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opencv/modules/stitching/src/seam_finders.cpp

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "precomp.hpp"
#include <map>
namespace cv {
namespace detail {
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void PairwiseSeamFinder::find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks)
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{
LOGLN("Finding seams...");
if (src.size() == 0)
return;
#if ENABLE_LOG
int64 t = getTickCount();
#endif
images_ = src;
sizes_.resize(src.size());
for (size_t i = 0; i < src.size(); ++i)
sizes_[i] = src[i].size();
corners_ = corners;
masks_ = masks;
run();
LOGLN("Finding seams, time: " << ((getTickCount() - t) / getTickFrequency()) << " sec");
}
void PairwiseSeamFinder::run()
{
for (size_t i = 0; i < sizes_.size() - 1; ++i)
{
for (size_t j = i + 1; j < sizes_.size(); ++j)
{
Rect roi;
if (overlapRoi(corners_[i], corners_[j], sizes_[i], sizes_[j], roi))
findInPair(i, j, roi);
}
}
}
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void VoronoiSeamFinder::find(const std::vector<Size> &sizes, const std::vector<Point> &corners,
std::vector<Mat> &masks)
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{
LOGLN("Finding seams...");
if (sizes.size() == 0)
return;
#if ENABLE_LOG
int64 t = getTickCount();
#endif
sizes_ = sizes;
corners_ = corners;
masks_ = masks;
run();
LOGLN("Finding seams, time: " << ((getTickCount() - t) / getTickFrequency()) << " sec");
}
void VoronoiSeamFinder::findInPair(size_t first, size_t second, Rect roi)
{
const int gap = 10;
Mat submask1(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Mat submask2(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Size img1 = sizes_[first], img2 = sizes_[second];
Mat mask1 = masks_[first], mask2 = masks_[second];
Point tl1 = corners_[first], tl2 = corners_[second];
// Cut submasks with some gap
for (int y = -gap; y < roi.height + gap; ++y)
{
for (int x = -gap; x < roi.width + gap; ++x)
{
int y1 = roi.y - tl1.y + y;
int x1 = roi.x - tl1.x + x;
if (y1 >= 0 && x1 >= 0 && y1 < img1.height && x1 < img1.width)
submask1.at<uchar>(y + gap, x + gap) = mask1.at<uchar>(y1, x1);
else
submask1.at<uchar>(y + gap, x + gap) = 0;
int y2 = roi.y - tl2.y + y;
int x2 = roi.x - tl2.x + x;
if (y2 >= 0 && x2 >= 0 && y2 < img2.height && x2 < img2.width)
submask2.at<uchar>(y + gap, x + gap) = mask2.at<uchar>(y2, x2);
else
submask2.at<uchar>(y + gap, x + gap) = 0;
}
}
Mat collision = (submask1 != 0) & (submask2 != 0);
Mat unique1 = submask1.clone(); unique1.setTo(0, collision);
Mat unique2 = submask2.clone(); unique2.setTo(0, collision);
Mat dist1, dist2;
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distanceTransform(unique1 == 0, dist1, DIST_L1, 3);
distanceTransform(unique2 == 0, dist2, DIST_L1, 3);
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Mat seam = dist1 < dist2;
for (int y = 0; y < roi.height; ++y)
{
for (int x = 0; x < roi.width; ++x)
{
if (seam.at<uchar>(y + gap, x + gap))
mask2.at<uchar>(roi.y - tl2.y + y, roi.x - tl2.x + x) = 0;
else
mask1.at<uchar>(roi.y - tl1.y + y, roi.x - tl1.x + x) = 0;
}
}
}
DpSeamFinder::DpSeamFinder(CostFunction costFunc) : costFunc_(costFunc) {}
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void DpSeamFinder::find(const std::vector<Mat> &src, const std::vector<Point> &corners, std::vector<Mat> &masks)
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{
LOGLN("Finding seams...");
#if ENABLE_LOG
int64 t = getTickCount();
#endif
if (src.size() == 0)
return;
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::vector<std::pair<size_t, size_t> > pairs;
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for (size_t i = 0; i+1 < src.size(); ++i)
for (size_t j = i+1; j < src.size(); ++j)
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pairs.push_back(std::make_pair(i, j));
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sort(pairs.begin(), pairs.end(), ImagePairLess(src, corners));
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std::reverse(pairs.begin(), pairs.end());
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for (size_t i = 0; i < pairs.size(); ++i)
{
size_t i0 = pairs[i].first, i1 = pairs[i].second;
process(src[i0], src[i1], corners[i0], corners[i1], masks[i0], masks[i1]);
}
LOGLN("Finding seams, time: " << ((getTickCount() - t) / getTickFrequency()) << " sec");
}
void DpSeamFinder::process(
const Mat &image1, const Mat &image2, Point tl1, Point tl2,
Mat &mask1, Mat &mask2)
{
CV_Assert(image1.size() == mask1.size());
CV_Assert(image2.size() == mask2.size());
Point intersectTl(std::max(tl1.x, tl2.x), std::max(tl1.y, tl2.y));
Point intersectBr(std::min(tl1.x + image1.cols, tl2.x + image2.cols),
std::min(tl1.y + image1.rows, tl2.y + image2.rows));
if (intersectTl.x >= intersectBr.x || intersectTl.y >= intersectBr.y)
return; // there are no conflicts
unionTl_ = Point(std::min(tl1.x, tl2.x), std::min(tl1.y, tl2.y));
unionBr_ = Point(std::max(tl1.x + image1.cols, tl2.x + image2.cols),
std::max(tl1.y + image1.rows, tl2.y + image2.rows));
unionSize_ = Size(unionBr_.x - unionTl_.x, unionBr_.y - unionTl_.y);
mask1_ = Mat::zeros(unionSize_, CV_8U);
mask2_ = Mat::zeros(unionSize_, CV_8U);
Mat tmp = mask1_(Rect(tl1.x - unionTl_.x, tl1.y - unionTl_.y, mask1.cols, mask1.rows));
mask1.copyTo(tmp);
tmp = mask2_(Rect(tl2.x - unionTl_.x, tl2.y - unionTl_.y, mask2.cols, mask2.rows));
mask2.copyTo(tmp);
// find both images contour masks
contour1mask_ = Mat::zeros(unionSize_, CV_8U);
contour2mask_ = Mat::zeros(unionSize_, CV_8U);
for (int y = 0; y < unionSize_.height; ++y)
{
for (int x = 0; x < unionSize_.width; ++x)
{
if (mask1_(y, x) &&
((x == 0 || !mask1_(y, x-1)) || (x == unionSize_.width-1 || !mask1_(y, x+1)) ||
(y == 0 || !mask1_(y-1, x)) || (y == unionSize_.height-1 || !mask1_(y+1, x))))
{
contour1mask_(y, x) = 255;
}
if (mask2_(y, x) &&
((x == 0 || !mask2_(y, x-1)) || (x == unionSize_.width-1 || !mask2_(y, x+1)) ||
(y == 0 || !mask2_(y-1, x)) || (y == unionSize_.height-1 || !mask2_(y+1, x))))
{
contour2mask_(y, x) = 255;
}
}
}
findComponents();
findEdges();
resolveConflicts(image1, image2, tl1, tl2, mask1, mask2);
}
void DpSeamFinder::findComponents()
{
// label all connected components and get information about them
ncomps_ = 0;
labels_.create(unionSize_);
states_.clear();
tls_.clear();
brs_.clear();
contours_.clear();
for (int y = 0; y < unionSize_.height; ++y)
{
for (int x = 0; x < unionSize_.width; ++x)
{
if (mask1_(y, x) && mask2_(y, x))
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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labels_(y, x) = std::numeric_limits<int>::max();
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else if (mask1_(y, x))
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labels_(y, x) = std::numeric_limits<int>::max()-1;
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else if (mask2_(y, x))
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labels_(y, x) = std::numeric_limits<int>::max()-2;
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else
labels_(y, x) = 0;
}
}
for (int y = 0; y < unionSize_.height; ++y)
{
for (int x = 0; x < unionSize_.width; ++x)
{
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if (labels_(y, x) >= std::numeric_limits<int>::max()-2)
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{
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if (labels_(y, x) == std::numeric_limits<int>::max())
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states_.push_back(INTERS);
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else if (labels_(y, x) == std::numeric_limits<int>::max()-1)
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states_.push_back(FIRST);
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else if (labels_(y, x) == std::numeric_limits<int>::max()-2)
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states_.push_back(SECOND);
floodFill(labels_, Point(x, y), ++ncomps_);
tls_.push_back(Point(x, y));
brs_.push_back(Point(x+1, y+1));
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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contours_.push_back(std::vector<Point>());
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}
if (labels_(y, x))
{
int l = labels_(y, x);
int ci = l-1;
tls_[ci].x = std::min(tls_[ci].x, x);
tls_[ci].y = std::min(tls_[ci].y, y);
brs_[ci].x = std::max(brs_[ci].x, x+1);
brs_[ci].y = std::max(brs_[ci].y, y+1);
if ((x == 0 || labels_(y, x-1) != l) || (x == unionSize_.width-1 || labels_(y, x+1) != l) ||
(y == 0 || labels_(y-1, x) != l) || (y == unionSize_.height-1 || labels_(y+1, x) != l))
{
contours_[ci].push_back(Point(x, y));
}
}
}
}
}
void DpSeamFinder::findEdges()
{
// find edges between components
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::map<std::pair<int, int>, int> wedges; // weighted edges
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for (int ci = 0; ci < ncomps_-1; ++ci)
{
for (int cj = ci+1; cj < ncomps_; ++cj)
{
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wedges[std::make_pair(ci, cj)] = 0;
wedges[std::make_pair(cj, ci)] = 0;
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}
}
for (int ci = 0; ci < ncomps_; ++ci)
{
for (size_t i = 0; i < contours_[ci].size(); ++i)
{
int x = contours_[ci][i].x;
int y = contours_[ci][i].y;
int l = ci + 1;
if (x > 0 && labels_(y, x-1) && labels_(y, x-1) != l)
{
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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wedges[std::make_pair(ci, labels_(y, x-1)-1)]++;
wedges[std::make_pair(labels_(y, x-1)-1, ci)]++;
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}
if (y > 0 && labels_(y-1, x) && labels_(y-1, x) != l)
{
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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wedges[std::make_pair(ci, labels_(y-1, x)-1)]++;
wedges[std::make_pair(labels_(y-1, x)-1, ci)]++;
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}
if (x < unionSize_.width-1 && labels_(y, x+1) && labels_(y, x+1) != l)
{
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wedges[std::make_pair(ci, labels_(y, x+1)-1)]++;
wedges[std::make_pair(labels_(y, x+1)-1, ci)]++;
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}
if (y < unionSize_.height-1 && labels_(y+1, x) && labels_(y+1, x) != l)
{
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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wedges[std::make_pair(ci, labels_(y+1, x)-1)]++;
wedges[std::make_pair(labels_(y+1, x)-1, ci)]++;
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}
}
}
edges_.clear();
for (int ci = 0; ci < ncomps_-1; ++ci)
{
for (int cj = ci+1; cj < ncomps_; ++cj)
{
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::map<std::pair<int, int>, int>::iterator itr = wedges.find(std::make_pair(ci, cj));
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if (itr != wedges.end() && itr->second > 0)
edges_.insert(itr->first);
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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itr = wedges.find(std::make_pair(cj, ci));
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if (itr != wedges.end() && itr->second > 0)
edges_.insert(itr->first);
}
}
}
void DpSeamFinder::resolveConflicts(
const Mat &image1, const Mat &image2, Point tl1, Point tl2, Mat &mask1, Mat &mask2)
{
if (costFunc_ == COLOR_GRAD)
computeGradients(image1, image2);
// resolve conflicts between components
bool hasConflict = true;
while (hasConflict)
{
int c1 = 0, c2 = 0;
hasConflict = false;
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for (std::set<std::pair<int, int> >::iterator itr = edges_.begin(); itr != edges_.end(); ++itr)
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{
c1 = itr->first;
c2 = itr->second;
if ((states_[c1] & INTERS) && (states_[c1] & (~INTERS)) != states_[c2])
{
hasConflict = true;
break;
}
}
if (hasConflict)
{
int l1 = c1+1, l2 = c2+1;
if (hasOnlyOneNeighbor(c1))
{
// if the first components has only one adjacent component
for (int y = tls_[c1].y; y < brs_[c1].y; ++y)
for (int x = tls_[c1].x; x < brs_[c1].x; ++x)
if (labels_(y, x) == l1)
labels_(y, x) = l2;
states_[c1] = states_[c2] == FIRST ? SECOND : FIRST;
}
else
{
// if the first component has more than one adjacent component
Point p1, p2;
if (getSeamTips(c1, c2, p1, p2))
{
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std::vector<Point> seam;
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bool isHorizontalSeam;
if (estimateSeam(image1, image2, tl1, tl2, c1, p1, p2, seam, isHorizontalSeam))
updateLabelsUsingSeam(c1, c2, seam, isHorizontalSeam);
}
states_[c1] = states_[c2] == FIRST ? INTERS_SECOND : INTERS_FIRST;
}
const int c[] = {c1, c2};
const int l[] = {l1, l2};
for (int i = 0; i < 2; ++i)
{
// update information about the (i+1)-th component
int x0 = tls_[c[i]].x, x1 = brs_[c[i]].x;
int y0 = tls_[c[i]].y, y1 = brs_[c[i]].y;
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tls_[c[i]] = Point(std::numeric_limits<int>::max(), std::numeric_limits<int>::max());
brs_[c[i]] = Point(std::numeric_limits<int>::min(), std::numeric_limits<int>::min());
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contours_[c[i]].clear();
for (int y = y0; y < y1; ++y)
{
for (int x = x0; x < x1; ++x)
{
if (labels_(y, x) == l[i])
{
tls_[c[i]].x = std::min(tls_[c[i]].x, x);
tls_[c[i]].y = std::min(tls_[c[i]].y, y);
brs_[c[i]].x = std::max(brs_[c[i]].x, x+1);
brs_[c[i]].y = std::max(brs_[c[i]].y, y+1);
if ((x == 0 || labels_(y, x-1) != l[i]) || (x == unionSize_.width-1 || labels_(y, x+1) != l[i]) ||
(y == 0 || labels_(y-1, x) != l[i]) || (y == unionSize_.height-1 || labels_(y+1, x) != l[i]))
{
contours_[c[i]].push_back(Point(x, y));
}
}
}
}
}
// remove edges
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edges_.erase(std::make_pair(c1, c2));
edges_.erase(std::make_pair(c2, c1));
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}
}
// update masks
int dx1 = unionTl_.x - tl1.x, dy1 = unionTl_.y - tl1.y;
int dx2 = unionTl_.x - tl2.x, dy2 = unionTl_.y - tl2.y;
for (int y = 0; y < mask2.rows; ++y)
{
for (int x = 0; x < mask2.cols; ++x)
{
int l = labels_(y - dy2, x - dx2);
if (l > 0 && (states_[l-1] & FIRST) && mask1.at<uchar>(y - dy2 + dy1, x - dx2 + dx1))
mask2.at<uchar>(y, x) = 0;
}
}
for (int y = 0; y < mask1.rows; ++y)
{
for (int x = 0; x < mask1.cols; ++x)
{
int l = labels_(y - dy1, x - dx1);
if (l > 0 && (states_[l-1] & SECOND) && mask2.at<uchar>(y - dy1 + dy2, x - dx1 + dx2))
mask1.at<uchar>(y, x) = 0;
}
}
}
void DpSeamFinder::computeGradients(const Mat &image1, const Mat &image2)
{
CV_Assert(image1.channels() == 3 || image1.channels() == 4);
CV_Assert(image2.channels() == 3 || image2.channels() == 4);
CV_Assert(costFunction() == COLOR_GRAD);
Mat gray;
if (image1.channels() == 3)
Make imgproc.hpp independent from C API
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cvtColor(image1, gray, COLOR_BGR2GRAY);
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else if (image1.channels() == 4)
Make imgproc.hpp independent from C API
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cvtColor(image1, gray, COLOR_BGRA2GRAY);
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Sobel(gray, gradx1_, CV_32F, 1, 0);
Sobel(gray, grady1_, CV_32F, 0, 1);
if (image2.channels() == 3)
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cvtColor(image2, gray, COLOR_BGR2GRAY);
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else if (image2.channels() == 4)
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cvtColor(image2, gray, COLOR_BGRA2GRAY);
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Sobel(gray, gradx2_, CV_32F, 1, 0);
Sobel(gray, grady2_, CV_32F, 0, 1);
}
bool DpSeamFinder::hasOnlyOneNeighbor(int comp)
{
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std::set<std::pair<int, int> >::iterator begin, end;
begin = lower_bound(edges_.begin(), edges_.end(), std::make_pair(comp, std::numeric_limits<int>::min()));
end = upper_bound(edges_.begin(), edges_.end(), std::make_pair(comp, std::numeric_limits<int>::max()));
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return ++begin == end;
}
bool DpSeamFinder::closeToContour(int y, int x, const Mat_<uchar> &contourMask)
{
const int rad = 2;
for (int dy = -rad; dy <= rad; ++dy)
{
if (y + dy >= 0 && y + dy < unionSize_.height)
{
for (int dx = -rad; dx <= rad; ++dx)
{
if (x + dx >= 0 && x + dx < unionSize_.width &&
contourMask(y + dy, x + dx))
{
return true;
}
}
}
}
return false;
}
bool DpSeamFinder::getSeamTips(int comp1, int comp2, Point &p1, Point &p2)
{
CV_Assert(states_[comp1] & INTERS);
// find special points
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std::vector<Point> specialPoints;
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int l2 = comp2+1;
for (size_t i = 0; i < contours_[comp1].size(); ++i)
{
int x = contours_[comp1][i].x;
int y = contours_[comp1][i].y;
if (closeToContour(y, x, contour1mask_) &&
closeToContour(y, x, contour2mask_) &&
((x > 0 && labels_(y, x-1) == l2) ||
(y > 0 && labels_(y-1, x) == l2) ||
(x < unionSize_.width-1 && labels_(y, x+1) == l2) ||
(y < unionSize_.height-1 && labels_(y+1, x) == l2)))
{
specialPoints.push_back(Point(x, y));
}
}
if (specialPoints.size() < 2)
return false;
// find clusters
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std::vector<int> labels;
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cv::partition(specialPoints, labels, ClosePoints(10));
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int nlabels = *std::max_element(labels.begin(), labels.end()) + 1;
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if (nlabels < 2)
return false;
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std::vector<Point> sum(nlabels);
std::vector<std::vector<Point> > points(nlabels);
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for (size_t i = 0; i < specialPoints.size(); ++i)
{
sum[labels[i]] += specialPoints[i];
points[labels[i]].push_back(specialPoints[i]);
}
// select two most distant clusters
int idx[2] = {-1,-1};
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double maxDist = -std::numeric_limits<double>::max();
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for (int i = 0; i < nlabels-1; ++i)
{
for (int j = i+1; j < nlabels; ++j)
{
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double size1 = static_cast<double>(points[i].size()), size2 = static_cast<double>(points[j].size());
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double cx1 = cvRound(sum[i].x / size1), cy1 = cvRound(sum[i].y / size1);
double cx2 = cvRound(sum[j].x / size2), cy2 = cvRound(sum[j].y / size1);
double dist = (cx1 - cx2) * (cx1 - cx2) + (cy1 - cy2) * (cy1 - cy2);
if (dist > maxDist)
{
maxDist = dist;
idx[0] = i;
idx[1] = j;
}
}
}
// select two points closest to the clusters' centers
Point p[2];
for (int i = 0; i < 2; ++i)
{
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double size = static_cast<double>(points[idx[i]].size());
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double cx = cvRound(sum[idx[i]].x / size);
double cy = cvRound(sum[idx[i]].y / size);
size_t closest = points[idx[i]].size();
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double minDist = std::numeric_limits<double>::max();
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for (size_t j = 0; j < points[idx[i]].size(); ++j)
{
double dist = (points[idx[i]][j].x - cx) * (points[idx[i]][j].x - cx) +
(points[idx[i]][j].y - cy) * (points[idx[i]][j].y - cy);
if (dist < minDist)
{
minDist = dist;
closest = j;
}
}
p[i] = points[idx[i]][closest];
}
p1 = p[0];
p2 = p[1];
return true;
}
namespace
{
template <typename T>
float diffL2Square3(const Mat &image1, int y1, int x1, const Mat &image2, int y2, int x2)
{
const T *r1 = image1.ptr<T>(y1);
const T *r2 = image2.ptr<T>(y2);
return static_cast<float>(sqr(r1[3*x1] - r2[3*x2]) + sqr(r1[3*x1+1] - r2[3*x2+1]) +
sqr(r1[3*x1+2] - r2[3*x2+2]));
}
template <typename T>
float diffL2Square4(const Mat &image1, int y1, int x1, const Mat &image2, int y2, int x2)
{
const T *r1 = image1.ptr<T>(y1);
const T *r2 = image2.ptr<T>(y2);
return static_cast<float>(sqr(r1[4*x1] - r2[4*x2]) + sqr(r1[4*x1+1] - r2[4*x2+1]) +
sqr(r1[4*x1+2] - r2[4*x2+2]));
}
} // namespace
void DpSeamFinder::computeCosts(
const Mat &image1, const Mat &image2, Point tl1, Point tl2,
int comp, Mat_<float> &costV, Mat_<float> &costH)
{
CV_Assert(states_[comp] & INTERS);
// compute costs
float (*diff)(const Mat&, int, int, const Mat&, int, int) = 0;
if (image1.type() == CV_32FC3 && image2.type() == CV_32FC3)
diff = diffL2Square3<float>;
else if (image1.type() == CV_8UC3 && image2.type() == CV_8UC3)
diff = diffL2Square3<uchar>;
else if (image1.type() == CV_32FC4 && image2.type() == CV_32FC4)
diff = diffL2Square4<float>;
else if (image1.type() == CV_8UC4 && image2.type() == CV_8UC4)
diff = diffL2Square4<uchar>;
else
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CV_Error(Error::StsBadArg, "both images must have CV_32FC3(4) or CV_8UC3(4) type");
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int l = comp+1;
Rect roi(tls_[comp], brs_[comp]);
int dx1 = unionTl_.x - tl1.x, dy1 = unionTl_.y - tl1.y;
int dx2 = unionTl_.x - tl2.x, dy2 = unionTl_.y - tl2.y;
const float badRegionCost = normL2(Point3f(255.f, 255.f, 255.f),
Point3f(0.f, 0.f, 0.f));
costV.create(roi.height, roi.width+1);
for (int y = roi.y; y < roi.br().y; ++y)
{
for (int x = roi.x; x < roi.br().x+1; ++x)
{
if (labels_(y, x) == l && x > 0 && labels_(y, x-1) == l)
{
float costColor = (diff(image1, y + dy1, x + dx1 - 1, image2, y + dy2, x + dx2) +
diff(image1, y + dy1, x + dx1, image2, y + dy2, x + dx2 - 1)) / 2;
if (costFunc_ == COLOR)
costV(y - roi.y, x - roi.x) = costColor;
else if (costFunc_ == COLOR_GRAD)
{
float costGrad = std::abs(gradx1_(y + dy1, x + dx1)) + std::abs(gradx1_(y + dy1, x + dx1 - 1)) +
std::abs(gradx2_(y + dy2, x + dx2)) + std::abs(gradx2_(y + dy2, x + dx2 - 1)) + 1.f;
costV(y - roi.y, x - roi.x) = costColor / costGrad;
}
}
else
costV(y - roi.y, x - roi.x) = badRegionCost;
}
}
costH.create(roi.height+1, roi.width);
for (int y = roi.y; y < roi.br().y+1; ++y)
{
for (int x = roi.x; x < roi.br().x; ++x)
{
if (labels_(y, x) == l && y > 0 && labels_(y-1, x) == l)
{
float costColor = (diff(image1, y + dy1 - 1, x + dx1, image2, y + dy2, x + dx2) +
diff(image1, y + dy1, x + dx1, image2, y + dy2 - 1, x + dx2)) / 2;
if (costFunc_ == COLOR)
costH(y - roi.y, x - roi.x) = costColor;
else if (costFunc_ == COLOR_GRAD)
{
float costGrad = std::abs(grady1_(y + dy1, x + dx1)) + std::abs(grady1_(y + dy1 - 1, x + dx1)) +
std::abs(grady2_(y + dy2, x + dx2)) + std::abs(grady2_(y + dy2 - 1, x + dx2)) + 1.f;
costH(y - roi.y, x - roi.x) = costColor / costGrad;
}
}
else
costH(y - roi.y, x - roi.x) = badRegionCost;
}
}
}
bool DpSeamFinder::estimateSeam(
const Mat &image1, const Mat &image2, Point tl1, Point tl2, int comp,
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Point p1, Point p2, std::vector<Point> &seam, bool &isHorizontal)
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{
CV_Assert(states_[comp] & INTERS);
Mat_<float> costV, costH;
computeCosts(image1, image2, tl1, tl2, comp, costV, costH);
Rect roi(tls_[comp], brs_[comp]);
Point src = p1 - roi.tl();
Point dst = p2 - roi.tl();
int l = comp+1;
// estimate seam direction
bool swapped = false;
isHorizontal = std::abs(dst.x - src.x) > std::abs(dst.y - src.y);
if (isHorizontal)
{
if (src.x > dst.x)
{
std::swap(src, dst);
swapped = true;
}
}
else if (src.y > dst.y)
{
swapped = true;
std::swap(src, dst);
}
// find optimal control
Mat_<uchar> control = Mat::zeros(roi.size(), CV_8U);
Mat_<uchar> reachable = Mat::zeros(roi.size(), CV_8U);
Mat_<float> cost = Mat::zeros(roi.size(), CV_32F);
reachable(src) = 1;
cost(src) = 0.f;
int nsteps;
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std::pair<float, int> steps[3];
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if (isHorizontal)
{
for (int x = src.x+1; x <= dst.x; ++x)
{
for (int y = 0; y < roi.height; ++y)
{
// seam follows along upper side of pixels
nsteps = 0;
if (labels_(y + roi.y, x + roi.x) == l)
{
if (reachable(y, x-1))
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steps[nsteps++] = std::make_pair(cost(y, x-1) + costH(y, x-1), 1);
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if (y > 0 && reachable(y-1, x-1))
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steps[nsteps++] = std::make_pair(cost(y-1, x-1) + costH(y-1, x-1) + costV(y-1, x), 2);
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if (y < roi.height-1 && reachable(y+1, x-1))
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steps[nsteps++] = std::make_pair(cost(y+1, x-1) + costH(y+1, x-1) + costV(y, x), 3);
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}
if (nsteps)
{
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std::pair<float, int> opt = *min_element(steps, steps + nsteps);
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cost(y, x) = opt.first;
control(y, x) = (uchar)opt.second;
reachable(y, x) = 255;
}
}
}
}
else
{
for (int y = src.y+1; y <= dst.y; ++y)
{
for (int x = 0; x < roi.width; ++x)
{
// seam follows along left side of pixels
nsteps = 0;
if (labels_(y + roi.y, x + roi.x) == l)
{
if (reachable(y-1, x))
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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steps[nsteps++] = std::make_pair(cost(y-1, x) + costV(y-1, x), 1);
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if (x > 0 && reachable(y-1, x-1))
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steps[nsteps++] = std::make_pair(cost(y-1, x-1) + costV(y-1, x-1) + costH(y, x-1), 2);
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if (x < roi.width-1 && reachable(y-1, x+1))
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steps[nsteps++] = std::make_pair(cost(y-1, x+1) + costV(y-1, x+1) + costH(y, x), 3);
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}
if (nsteps)
{
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std::pair<float, int> opt = *min_element(steps, steps + nsteps);
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cost(y, x) = opt.first;
control(y, x) = (uchar)opt.second;
reachable(y, x) = 255;
}
}
}
}
if (!reachable(dst))
return false;
// restore seam
Point p = dst;
seam.clear();
seam.push_back(p + roi.tl());
if (isHorizontal)
{
for (; p.x != src.x; seam.push_back(p + roi.tl()))
{
if (control(p) == 2) p.y--;
else if (control(p) == 3) p.y++;
p.x--;
}
}
else
{
for (; p.y != src.y; seam.push_back(p + roi.tl()))
{
if (control(p) == 2) p.x--;
else if (control(p) == 3) p.x++;
p.y--;
}
}
if (!swapped)
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std::reverse(seam.begin(), seam.end());
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CV_Assert(seam.front() == p1);
CV_Assert(seam.back() == p2);
return true;
}
void DpSeamFinder::updateLabelsUsingSeam(
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int comp1, int comp2, const std::vector<Point> &seam, bool isHorizontalSeam)
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{
Mat_<int> mask = Mat::zeros(brs_[comp1].y - tls_[comp1].y,
brs_[comp1].x - tls_[comp1].x, CV_32S);
for (size_t i = 0; i < contours_[comp1].size(); ++i)
mask(contours_[comp1][i] - tls_[comp1]) = 255;
for (size_t i = 0; i < seam.size(); ++i)
mask(seam[i] - tls_[comp1]) = 255;
// find connected components after seam carving
int l1 = comp1+1, l2 = comp2+1;
int ncomps = 0;
for (int y = 0; y < mask.rows; ++y)
for (int x = 0; x < mask.cols; ++x)
if (!mask(y, x) && labels_(y + tls_[comp1].y, x + tls_[comp1].x) == l1)
floodFill(mask, Point(x, y), ++ncomps);
for (size_t i = 0; i < contours_[comp1].size(); ++i)
{
int x = contours_[comp1][i].x - tls_[comp1].x;
int y = contours_[comp1][i].y - tls_[comp1].y;
bool ok = false;
static const int dx[] = {-1, +1, 0, 0, -1, +1, -1, +1};
static const int dy[] = {0, 0, -1, +1, -1, -1, +1, +1};
for (int j = 0; j < 8; ++j)
{
int c = x + dx[j];
int r = y + dy[j];
if (c >= 0 && c < mask.cols && r >= 0 && r < mask.rows &&
mask(r, c) && mask(r, c) != 255)
{
ok = true;
mask(y, x) = mask(r, c);
}
}
if (!ok)
mask(y, x) = 0;
}
if (isHorizontalSeam)
{
for (size_t i = 0; i < seam.size(); ++i)
{
int x = seam[i].x - tls_[comp1].x;
int y = seam[i].y - tls_[comp1].y;
if (y < mask.rows-1 && mask(y+1, x) && mask(y+1, x) != 255)
mask(y, x) = mask(y+1, x);
else
mask(y, x) = 0;
}
}
else
{
for (size_t i = 0; i < seam.size(); ++i)
{
int x = seam[i].x - tls_[comp1].x;
int y = seam[i].y - tls_[comp1].y;
if (x < mask.cols-1 && mask(y, x+1) && mask(y, x+1) != 255)
mask(y, x) = mask(y, x+1);
else
mask(y, x) = 0;
}
}
// find new components connected with the second component and
// with other components except the ones we are working with
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::map<int, int> connect2;
std::map<int, int> connectOther;
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for (int i = 1; i <= ncomps; ++i)
{
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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connect2.insert(std::make_pair(i, 0));
connectOther.insert(std::make_pair(i, 0));
Normalize line endings and whitespace
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}
for (size_t i = 0; i < contours_[comp1].size(); ++i)
{
int x = contours_[comp1][i].x;
int y = contours_[comp1][i].y;
if ((x > 0 && labels_(y, x-1) == l2) ||
(y > 0 && labels_(y-1, x) == l2) ||
(x < unionSize_.width-1 && labels_(y, x+1) == l2) ||
(y < unionSize_.height-1 && labels_(y+1, x) == l2))
{
connect2[mask(y - tls_[comp1].y, x - tls_[comp1].x)]++;
}
if ((x > 0 && labels_(y, x-1) != l1 && labels_(y, x-1) != l2) ||
(y > 0 && labels_(y-1, x) != l1 && labels_(y-1, x) != l2) ||
(x < unionSize_.width-1 && labels_(y, x+1) != l1 && labels_(y, x+1) != l2) ||
(y < unionSize_.height-1 && labels_(y+1, x) != l1 && labels_(y+1, x) != l2))
{
connectOther[mask(y - tls_[comp1].y, x - tls_[comp1].x)]++;
}
}
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::vector<int> isAdjComp(ncomps + 1, 0);
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for (std::map<int, int>::iterator itr = connect2.begin(); itr != connect2.end(); ++itr)
Normalize line endings and whitespace
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{
Fix warnings from MSVC 9 64-bit
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double len = static_cast<double>(contours_[comp1].size());
Normalize line endings and whitespace
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isAdjComp[itr->first] = itr->second / len > 0.05 && connectOther.find(itr->first)->second / len < 0.1;
}
// update labels
for (int y = 0; y < mask.rows; ++y)
for (int x = 0; x < mask.cols; ++x)
if (mask(y, x) && isAdjComp[mask(y, x)])
labels_(y + tls_[comp1].y, x + tls_[comp1].x) = l2;
}
class GraphCutSeamFinder::Impl : public PairwiseSeamFinder
{
public:
Impl(int cost_type, float terminal_cost, float bad_region_penalty)
: cost_type_(cost_type), terminal_cost_(terminal_cost), bad_region_penalty_(bad_region_penalty) {}
~Impl() {}
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void find(const std::vector<Mat> &src, const std::vector<Point> &corners, std::vector<Mat> &masks);
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void findInPair(size_t first, size_t second, Rect roi);
private:
void setGraphWeightsColor(const Mat &img1, const Mat &img2,
const Mat &mask1, const Mat &mask2, GCGraph<float> &graph);
void setGraphWeightsColorGrad(const Mat &img1, const Mat &img2, const Mat &dx1, const Mat &dx2,
const Mat &dy1, const Mat &dy2, const Mat &mask1, const Mat &mask2,
GCGraph<float> &graph);
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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std::vector<Mat> dx_, dy_;
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int cost_type_;
float terminal_cost_;
float bad_region_penalty_;
};
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void GraphCutSeamFinder::Impl::find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks)
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{
// Compute gradients
dx_.resize(src.size());
dy_.resize(src.size());
Mat dx, dy;
for (size_t i = 0; i < src.size(); ++i)
{
CV_Assert(src[i].channels() == 3);
Sobel(src[i], dx, CV_32F, 1, 0);
Sobel(src[i], dy, CV_32F, 0, 1);
dx_[i].create(src[i].size(), CV_32F);
dy_[i].create(src[i].size(), CV_32F);
for (int y = 0; y < src[i].rows; ++y)
{
const Point3f* dx_row = dx.ptr<Point3f>(y);
const Point3f* dy_row = dy.ptr<Point3f>(y);
float* dx_row_ = dx_[i].ptr<float>(y);
float* dy_row_ = dy_[i].ptr<float>(y);
for (int x = 0; x < src[i].cols; ++x)
{
dx_row_[x] = normL2(dx_row[x]);
dy_row_[x] = normL2(dy_row[x]);
}
}
}
PairwiseSeamFinder::find(src, corners, masks);
}
void GraphCutSeamFinder::Impl::setGraphWeightsColor(const Mat &img1, const Mat &img2,
const Mat &mask1, const Mat &mask2, GCGraph<float> &graph)
{
const Size img_size = img1.size();
// Set terminal weights
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
int v = graph.addVtx();
graph.addTermWeights(v, mask1.at<uchar>(y, x) ? terminal_cost_ : 0.f,
mask2.at<uchar>(y, x) ? terminal_cost_ : 0.f);
}
}
// Set regular edge weights
const float weight_eps = 1.f;
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
int v = y * img_size.width + x;
if (x < img_size.width - 1)
{
float weight = normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y, x + 1), img2.at<Point3f>(y, x + 1)) +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y, x + 1) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y, x + 1))
weight += bad_region_penalty_;
graph.addEdges(v, v + 1, weight, weight);
}
if (y < img_size.height - 1)
{
float weight = normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y + 1, x), img2.at<Point3f>(y + 1, x)) +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y + 1, x) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y + 1, x))
weight += bad_region_penalty_;
graph.addEdges(v, v + img_size.width, weight, weight);
}
}
}
}
void GraphCutSeamFinder::Impl::setGraphWeightsColorGrad(
const Mat &img1, const Mat &img2, const Mat &dx1, const Mat &dx2,
const Mat &dy1, const Mat &dy2, const Mat &mask1, const Mat &mask2,
GCGraph<float> &graph)
{
const Size img_size = img1.size();
// Set terminal weights
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
int v = graph.addVtx();
graph.addTermWeights(v, mask1.at<uchar>(y, x) ? terminal_cost_ : 0.f,
mask2.at<uchar>(y, x) ? terminal_cost_ : 0.f);
}
}
// Set regular edge weights
const float weight_eps = 1.f;
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
int v = y * img_size.width + x;
if (x < img_size.width - 1)
{
float grad = dx1.at<float>(y, x) + dx1.at<float>(y, x + 1) +
dx2.at<float>(y, x) + dx2.at<float>(y, x + 1) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y, x + 1), img2.at<Point3f>(y, x + 1))) / grad +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y, x + 1) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y, x + 1))
weight += bad_region_penalty_;
graph.addEdges(v, v + 1, weight, weight);
}
if (y < img_size.height - 1)
{
float grad = dy1.at<float>(y, x) + dy1.at<float>(y + 1, x) +
dy2.at<float>(y, x) + dy2.at<float>(y + 1, x) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y + 1, x), img2.at<Point3f>(y + 1, x))) / grad +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y + 1, x) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y + 1, x))
weight += bad_region_penalty_;
graph.addEdges(v, v + img_size.width, weight, weight);
}
}
}
}
void GraphCutSeamFinder::Impl::findInPair(size_t first, size_t second, Rect roi)
{
Mat img1 = images_[first], img2 = images_[second];
Mat dx1 = dx_[first], dx2 = dx_[second];
Mat dy1 = dy_[first], dy2 = dy_[second];
Mat mask1 = masks_[first], mask2 = masks_[second];
Point tl1 = corners_[first], tl2 = corners_[second];
const int gap = 10;
Mat subimg1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32FC3);
Mat subimg2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32FC3);
Mat submask1(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Mat submask2(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Mat subdx1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdy1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdx2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdy2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
// Cut subimages and submasks with some gap
for (int y = -gap; y < roi.height + gap; ++y)
{
for (int x = -gap; x < roi.width + gap; ++x)
{
int y1 = roi.y - tl1.y + y;
int x1 = roi.x - tl1.x + x;
if (y1 >= 0 && x1 >= 0 && y1 < img1.rows && x1 < img1.cols)
{
subimg1.at<Point3f>(y + gap, x + gap) = img1.at<Point3f>(y1, x1);
submask1.at<uchar>(y + gap, x + gap) = mask1.at<uchar>(y1, x1);
subdx1.at<float>(y + gap, x + gap) = dx1.at<float>(y1, x1);
subdy1.at<float>(y + gap, x + gap) = dy1.at<float>(y1, x1);
}
else
{
subimg1.at<Point3f>(y + gap, x + gap) = Point3f(0, 0, 0);
submask1.at<uchar>(y + gap, x + gap) = 0;
subdx1.at<float>(y + gap, x + gap) = 0.f;
subdy1.at<float>(y + gap, x + gap) = 0.f;
}
int y2 = roi.y - tl2.y + y;
int x2 = roi.x - tl2.x + x;
if (y2 >= 0 && x2 >= 0 && y2 < img2.rows && x2 < img2.cols)
{
subimg2.at<Point3f>(y + gap, x + gap) = img2.at<Point3f>(y2, x2);
submask2.at<uchar>(y + gap, x + gap) = mask2.at<uchar>(y2, x2);
subdx2.at<float>(y + gap, x + gap) = dx2.at<float>(y2, x2);
subdy2.at<float>(y + gap, x + gap) = dy2.at<float>(y2, x2);
}
else
{
subimg2.at<Point3f>(y + gap, x + gap) = Point3f(0, 0, 0);
submask2.at<uchar>(y + gap, x + gap) = 0;
subdx2.at<float>(y + gap, x + gap) = 0.f;
subdy2.at<float>(y + gap, x + gap) = 0.f;
}
}
}
const int vertex_count = (roi.height + 2 * gap) * (roi.width + 2 * gap);
const int edge_count = (roi.height - 1 + 2 * gap) * (roi.width + 2 * gap) +
(roi.width - 1 + 2 * gap) * (roi.height + 2 * gap);
GCGraph<float> graph(vertex_count, edge_count);
switch (cost_type_)
{
case GraphCutSeamFinder::COST_COLOR:
setGraphWeightsColor(subimg1, subimg2, submask1, submask2, graph);
break;
case GraphCutSeamFinder::COST_COLOR_GRAD:
setGraphWeightsColorGrad(subimg1, subimg2, subdx1, subdx2, subdy1, subdy2,
submask1, submask2, graph);
break;
default:
Move C API of opencv_calib3d to separate file
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CV_Error(Error::StsBadArg, "unsupported pixel similarity measure");
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}
graph.maxFlow();
for (int y = 0; y < roi.height; ++y)
{
for (int x = 0; x < roi.width; ++x)
{
if (graph.inSourceSegment((y + gap) * (roi.width + 2 * gap) + x + gap))
{
if (mask1.at<uchar>(roi.y - tl1.y + y, roi.x - tl1.x + x))
mask2.at<uchar>(roi.y - tl2.y + y, roi.x - tl2.x + x) = 0;
}
else
{
if (mask2.at<uchar>(roi.y - tl2.y + y, roi.x - tl2.x + x))
mask1.at<uchar>(roi.y - tl1.y + y, roi.x - tl1.x + x) = 0;
}
}
}
}
GraphCutSeamFinder::GraphCutSeamFinder(int cost_type, float terminal_cost, float bad_region_penalty)
: impl_(new Impl(cost_type, terminal_cost, bad_region_penalty)) {}
GraphCutSeamFinder::~GraphCutSeamFinder() {}
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void GraphCutSeamFinder::find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks)
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{
impl_->find(src, corners, masks);
}
renmaed gpu module -> cuda
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#ifdef HAVE_OPENCV_CUDA
Remove all using directives for STL namespace and members Made all STL usages explicit to be able automatically find all usages of particular class or function.
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void GraphCutSeamFinderGpu::find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks)
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{
// Compute gradients
dx_.resize(src.size());
dy_.resize(src.size());
Mat dx, dy;
for (size_t i = 0; i < src.size(); ++i)
{
CV_Assert(src[i].channels() == 3);
Sobel(src[i], dx, CV_32F, 1, 0);
Sobel(src[i], dy, CV_32F, 0, 1);
dx_[i].create(src[i].size(), CV_32F);
dy_[i].create(src[i].size(), CV_32F);
for (int y = 0; y < src[i].rows; ++y)
{
const Point3f* dx_row = dx.ptr<Point3f>(y);
const Point3f* dy_row = dy.ptr<Point3f>(y);
float* dx_row_ = dx_[i].ptr<float>(y);
float* dy_row_ = dy_[i].ptr<float>(y);
for (int x = 0; x < src[i].cols; ++x)
{
dx_row_[x] = normL2(dx_row[x]);
dy_row_[x] = normL2(dy_row[x]);
}
}
}
PairwiseSeamFinder::find(src, corners, masks);
}
void GraphCutSeamFinderGpu::findInPair(size_t first, size_t second, Rect roi)
{
Mat img1 = images_[first], img2 = images_[second];
Mat dx1 = dx_[first], dx2 = dx_[second];
Mat dy1 = dy_[first], dy2 = dy_[second];
Mat mask1 = masks_[first], mask2 = masks_[second];
Point tl1 = corners_[first], tl2 = corners_[second];
const int gap = 10;
Mat subimg1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32FC3);
Mat subimg2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32FC3);
Mat submask1(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Mat submask2(roi.height + 2 * gap, roi.width + 2 * gap, CV_8U);
Mat subdx1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdy1(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdx2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
Mat subdy2(roi.height + 2 * gap, roi.width + 2 * gap, CV_32F);
// Cut subimages and submasks with some gap
for (int y = -gap; y < roi.height + gap; ++y)
{
for (int x = -gap; x < roi.width + gap; ++x)
{
int y1 = roi.y - tl1.y + y;
int x1 = roi.x - tl1.x + x;
if (y1 >= 0 && x1 >= 0 && y1 < img1.rows && x1 < img1.cols)
{
subimg1.at<Point3f>(y + gap, x + gap) = img1.at<Point3f>(y1, x1);
submask1.at<uchar>(y + gap, x + gap) = mask1.at<uchar>(y1, x1);
subdx1.at<float>(y + gap, x + gap) = dx1.at<float>(y1, x1);
subdy1.at<float>(y + gap, x + gap) = dy1.at<float>(y1, x1);
}
else
{
subimg1.at<Point3f>(y + gap, x + gap) = Point3f(0, 0, 0);
submask1.at<uchar>(y + gap, x + gap) = 0;
subdx1.at<float>(y + gap, x + gap) = 0.f;
subdy1.at<float>(y + gap, x + gap) = 0.f;
}
int y2 = roi.y - tl2.y + y;
int x2 = roi.x - tl2.x + x;
if (y2 >= 0 && x2 >= 0 && y2 < img2.rows && x2 < img2.cols)
{
subimg2.at<Point3f>(y + gap, x + gap) = img2.at<Point3f>(y2, x2);
submask2.at<uchar>(y + gap, x + gap) = mask2.at<uchar>(y2, x2);
subdx2.at<float>(y + gap, x + gap) = dx2.at<float>(y2, x2);
subdy2.at<float>(y + gap, x + gap) = dy2.at<float>(y2, x2);
}
else
{
subimg2.at<Point3f>(y + gap, x + gap) = Point3f(0, 0, 0);
submask2.at<uchar>(y + gap, x + gap) = 0;
subdx2.at<float>(y + gap, x + gap) = 0.f;
subdy2.at<float>(y + gap, x + gap) = 0.f;
}
}
}
Mat terminals, leftT, rightT, top, bottom;
switch (cost_type_)
{
case GraphCutSeamFinder::COST_COLOR:
setGraphWeightsColor(subimg1, subimg2, submask1, submask2,
terminals, leftT, rightT, top, bottom);
break;
case GraphCutSeamFinder::COST_COLOR_GRAD:
setGraphWeightsColorGrad(subimg1, subimg2, subdx1, subdx2, subdy1, subdy2,
submask1, submask2, terminals, leftT, rightT, top, bottom);
break;
default:
Move C API of opencv_calib3d to separate file
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CV_Error(Error::StsBadArg, "unsupported pixel similarity measure");
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}
renamed gpu namespace -> cuda
2013-08-28 19:45:13 +08:00
cuda::GpuMat terminals_d(terminals);
cuda::GpuMat leftT_d(leftT);
cuda::GpuMat rightT_d(rightT);
cuda::GpuMat top_d(top);
cuda::GpuMat bottom_d(bottom);
cuda::GpuMat labels_d, buf_d;
cuda::graphcut(terminals_d, leftT_d, rightT_d, top_d, bottom_d, labels_d, buf_d);
Normalize line endings and whitespace
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Mat_<uchar> labels = (Mat)labels_d;
for (int y = 0; y < roi.height; ++y)
{
for (int x = 0; x < roi.width; ++x)
{
if (labels(y + gap, x + gap))
{
if (mask1.at<uchar>(roi.y - tl1.y + y, roi.x - tl1.x + x))
mask2.at<uchar>(roi.y - tl2.y + y, roi.x - tl2.x + x) = 0;
}
else
{
if (mask2.at<uchar>(roi.y - tl2.y + y, roi.x - tl2.x + x))
mask1.at<uchar>(roi.y - tl1.y + y, roi.x - tl1.x + x) = 0;
}
}
}
}
void GraphCutSeamFinderGpu::setGraphWeightsColor(const Mat &img1, const Mat &img2, const Mat &mask1, const Mat &mask2,
Mat &terminals, Mat &leftT, Mat &rightT, Mat &top, Mat &bottom)
{
const Size img_size = img1.size();
terminals.create(img_size, CV_32S);
leftT.create(Size(img_size.height, img_size.width), CV_32S);
rightT.create(Size(img_size.height, img_size.width), CV_32S);
top.create(img_size, CV_32S);
bottom.create(img_size, CV_32S);
Mat_<int> terminals_(terminals);
Mat_<int> leftT_(leftT);
Mat_<int> rightT_(rightT);
Mat_<int> top_(top);
Mat_<int> bottom_(bottom);
// Set terminal weights
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
float source = mask1.at<uchar>(y, x) ? terminal_cost_ : 0.f;
float sink = mask2.at<uchar>(y, x) ? terminal_cost_ : 0.f;
terminals_(y, x) = saturate_cast<int>((source - sink) * 255.f);
}
}
// Set regular edge weights
const float weight_eps = 1.f;
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
if (x > 0)
{
float weight = normL2(img1.at<Point3f>(y, x - 1), img2.at<Point3f>(y, x - 1)) +
normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
weight_eps;
if (!mask1.at<uchar>(y, x - 1) || !mask1.at<uchar>(y, x) ||
!mask2.at<uchar>(y, x - 1) || !mask2.at<uchar>(y, x))
weight += bad_region_penalty_;
leftT_(x, y) = saturate_cast<int>(weight * 255.f);
}
else
leftT_(x, y) = 0;
if (x < img_size.width - 1)
{
float weight = normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y, x + 1), img2.at<Point3f>(y, x + 1)) +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y, x + 1) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y, x + 1))
weight += bad_region_penalty_;
rightT_(x, y) = saturate_cast<int>(weight * 255.f);
}
else
rightT_(x, y) = 0;
if (y > 0)
{
float weight = normL2(img1.at<Point3f>(y - 1, x), img2.at<Point3f>(y - 1, x)) +
normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
weight_eps;
if (!mask1.at<uchar>(y - 1, x) || !mask1.at<uchar>(y, x) ||
!mask2.at<uchar>(y - 1, x) || !mask2.at<uchar>(y, x))
weight += bad_region_penalty_;
top_(y, x) = saturate_cast<int>(weight * 255.f);
}
else
top_(y, x) = 0;
if (y < img_size.height - 1)
{
float weight = normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y + 1, x), img2.at<Point3f>(y + 1, x)) +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y + 1, x) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y + 1, x))
weight += bad_region_penalty_;
bottom_(y, x) = saturate_cast<int>(weight * 255.f);
}
else
bottom_(y, x) = 0;
}
}
}
void GraphCutSeamFinderGpu::setGraphWeightsColorGrad(
const Mat &img1, const Mat &img2, const Mat &dx1, const Mat &dx2,
const Mat &dy1, const Mat &dy2, const Mat &mask1, const Mat &mask2,
Mat &terminals, Mat &leftT, Mat &rightT, Mat &top, Mat &bottom)
{
const Size img_size = img1.size();
terminals.create(img_size, CV_32S);
leftT.create(Size(img_size.height, img_size.width), CV_32S);
rightT.create(Size(img_size.height, img_size.width), CV_32S);
top.create(img_size, CV_32S);
bottom.create(img_size, CV_32S);
Mat_<int> terminals_(terminals);
Mat_<int> leftT_(leftT);
Mat_<int> rightT_(rightT);
Mat_<int> top_(top);
Mat_<int> bottom_(bottom);
// Set terminal weights
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
float source = mask1.at<uchar>(y, x) ? terminal_cost_ : 0.f;
float sink = mask2.at<uchar>(y, x) ? terminal_cost_ : 0.f;
terminals_(y, x) = saturate_cast<int>((source - sink) * 255.f);
}
}
// Set regular edge weights
const float weight_eps = 1.f;
for (int y = 0; y < img_size.height; ++y)
{
for (int x = 0; x < img_size.width; ++x)
{
if (x > 0)
{
float grad = dx1.at<float>(y, x - 1) + dx1.at<float>(y, x) +
dx2.at<float>(y, x - 1) + dx2.at<float>(y, x) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y, x - 1), img2.at<Point3f>(y, x - 1)) +
normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x))) / grad +
weight_eps;
if (!mask1.at<uchar>(y, x - 1) || !mask1.at<uchar>(y, x) ||
!mask2.at<uchar>(y, x - 1) || !mask2.at<uchar>(y, x))
weight += bad_region_penalty_;
leftT_(x, y) = saturate_cast<int>(weight * 255.f);
}
else
leftT_(x, y) = 0;
if (x < img_size.width - 1)
{
float grad = dx1.at<float>(y, x) + dx1.at<float>(y, x + 1) +
dx2.at<float>(y, x) + dx2.at<float>(y, x + 1) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y, x + 1), img2.at<Point3f>(y, x + 1))) / grad +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y, x + 1) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y, x + 1))
weight += bad_region_penalty_;
rightT_(x, y) = saturate_cast<int>(weight * 255.f);
}
else
rightT_(x, y) = 0;
if (y > 0)
{
float grad = dy1.at<float>(y - 1, x) + dy1.at<float>(y, x) +
dy2.at<float>(y - 1, x) + dy2.at<float>(y, x) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y - 1, x), img2.at<Point3f>(y - 1, x)) +
normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x))) / grad +
weight_eps;
if (!mask1.at<uchar>(y - 1, x) || !mask1.at<uchar>(y, x) ||
!mask2.at<uchar>(y - 1, x) || !mask2.at<uchar>(y, x))
weight += bad_region_penalty_;
top_(y, x) = saturate_cast<int>(weight * 255.f);
}
else
top_(y, x) = 0;
if (y < img_size.height - 1)
{
float grad = dy1.at<float>(y, x) + dy1.at<float>(y + 1, x) +
dy2.at<float>(y, x) + dy2.at<float>(y + 1, x) + weight_eps;
float weight = (normL2(img1.at<Point3f>(y, x), img2.at<Point3f>(y, x)) +
normL2(img1.at<Point3f>(y + 1, x), img2.at<Point3f>(y + 1, x))) / grad +
weight_eps;
if (!mask1.at<uchar>(y, x) || !mask1.at<uchar>(y + 1, x) ||
!mask2.at<uchar>(y, x) || !mask2.at<uchar>(y + 1, x))
weight += bad_region_penalty_;
bottom_(y, x) = saturate_cast<int>(weight * 255.f);
}
else
bottom_(y, x) = 0;
}
}
}
#endif
} // namespace detail
} // namespace cv
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