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Fix 2.4 ocl Canny.

Browse Source 
This fix is a workaround for current 2.4 branch without introducing an
additional oclMat buffer into CannyBuf object.
Test case is cleaned up.
Volatile keywords in kernels are removed for performance concern.
This commit is contained in:
peng xiao 2013-05-29 14:15:26 +08:00
parent 2ccdf56119
commit d015fa76fa
3 changed files with 45 additions and 53 deletions
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50
modules/ocl/src/canny.cpp
View File

@ -87,7 +87,7 @@ void cv::ocl::CannyBuf::create(const Size &image_size, int apperture_size)
filterDY = createDerivFilter_GPU(CV_8U, CV_32S, 0, 1, apperture_size, BORDER_REPLICATE);
}
}
ensureSizeIsEnough(image_size.height + 2, image_size.width + 2, CV_32FC1, edgeBuf);
ensureSizeIsEnough(2 * (image_size.height + 2), image_size.width + 2, CV_32FC1, edgeBuf);
ensureSizeIsEnough(1, image_size.width * image_size.height, CV_16UC2, trackBuf1);
ensureSizeIsEnough(1, image_size.width * image_size.height, CV_16UC2, trackBuf2);
@ -141,13 +141,16 @@ namespace
void CannyCaller(CannyBuf &buf, oclMat &dst, float low_thresh, float high_thresh)
{
using namespace ::cv::ocl::canny;
calcMap_gpu(buf.dx, buf.dy, buf.edgeBuf, buf.edgeBuf, dst.rows, dst.cols, low_thresh, high_thresh);
oclMat magBuf = buf.edgeBuf(Rect(0, 0, buf.edgeBuf.cols, buf.edgeBuf.rows / 2));
oclMat mapBuf = buf.edgeBuf(Rect(0, buf.edgeBuf.rows / 2, buf.edgeBuf.cols, buf.edgeBuf.rows / 2));
edgesHysteresisLocal_gpu(buf.edgeBuf, buf.trackBuf1, buf.counter, dst.rows, dst.cols);
calcMap_gpu(buf.dx, buf.dy, magBuf, mapBuf, dst.rows, dst.cols, low_thresh, high_thresh);
edgesHysteresisGlobal_gpu(buf.edgeBuf, buf.trackBuf1, buf.trackBuf2, buf.counter, dst.rows, dst.cols);
edgesHysteresisLocal_gpu(mapBuf, buf.trackBuf1, buf.counter, dst.rows, dst.cols);
getEdges_gpu(buf.edgeBuf, dst, dst.rows, dst.cols);
edgesHysteresisGlobal_gpu(mapBuf, buf.trackBuf1, buf.trackBuf2, buf.counter, dst.rows, dst.cols);
getEdges_gpu(mapBuf, dst, dst.rows, dst.cols);
}
}
@ -172,18 +175,20 @@ void cv::ocl::Canny(const oclMat &src, CannyBuf &buf, oclMat &dst, double low_th
buf.create(src.size(), apperture_size);
buf.edgeBuf.setTo(Scalar::all(0));
oclMat magBuf = buf.edgeBuf(Rect(0, 0, buf.edgeBuf.cols, buf.edgeBuf.rows / 2));
if (apperture_size == 3)
{
calcSobelRowPass_gpu(src, buf.dx_buf, buf.dy_buf, src.rows, src.cols);
calcMagnitude_gpu(buf.dx_buf, buf.dy_buf, buf.dx, buf.dy, buf.edgeBuf, src.rows, src.cols, L2gradient);
calcMagnitude_gpu(buf.dx_buf, buf.dy_buf, buf.dx, buf.dy, magBuf, src.rows, src.cols, L2gradient);
}
else
{
buf.filterDX->apply(src, buf.dx);
buf.filterDY->apply(src, buf.dy);
calcMagnitude_gpu(buf.dx, buf.dy, buf.edgeBuf, src.rows, src.cols, L2gradient);
calcMagnitude_gpu(buf.dx, buf.dy, magBuf, src.rows, src.cols, L2gradient);
}
CannyCaller(buf, dst, static_cast<float>(low_thresh), static_cast<float>(high_thresh));
}
@ -209,7 +214,10 @@ void cv::ocl::Canny(const oclMat &dx, const oclMat &dy, CannyBuf &buf, oclMat &d
buf.dy = dy;
buf.create(dx.size(), -1);
buf.edgeBuf.setTo(Scalar::all(0));
calcMagnitude_gpu(buf.dx, buf.dy, buf.edgeBuf, dx.rows, dx.cols, L2gradient);
oclMat magBuf = buf.edgeBuf(Rect(0, 0, buf.edgeBuf.cols, buf.edgeBuf.rows / 2));
calcMagnitude_gpu(buf.dx, buf.dy, magBuf, dx.rows, dx.cols, L2gradient);
CannyCaller(buf, dst, static_cast<float>(low_thresh), static_cast<float>(high_thresh));
}
@ -234,7 +242,7 @@ void canny::calcSobelRowPass_gpu(const oclMat &src, oclMat &dx_buf, oclMat &dy_b
size_t globalThreads[3] = {cols, rows, 1};
size_t localThreads[3] = {16, 16, 1};
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
}
void canny::calcMagnitude_gpu(const oclMat &dx_buf, const oclMat &dy_buf, oclMat &dx, oclMat &dy, oclMat &mag, int rows, int cols, bool L2Grad)
@ -264,12 +272,8 @@ void canny::calcMagnitude_gpu(const oclMat &dx_buf, const oclMat &dy_buf, oclMat
size_t globalThreads[3] = {cols, rows, 1};
size_t localThreads[3] = {16, 16, 1};
char build_options [15] = "";
if(L2Grad)
{
strcat(build_options, "-D L2GRAD");
}
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1, build_options);
const char * build_options = L2Grad ? "-D L2GRAD":"";
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1, build_options);
}
void canny::calcMagnitude_gpu(const oclMat &dx, const oclMat &dy, oclMat &mag, int rows, int cols, bool L2Grad)
{
@ -292,12 +296,8 @@ void canny::calcMagnitude_gpu(const oclMat &dx, const oclMat &dy, oclMat &mag, i
size_t globalThreads[3] = {cols, rows, 1};
size_t localThreads[3] = {16, 16, 1};
char build_options [15] = "";
if(L2Grad)
{
strcat(build_options, "-D L2GRAD");
}
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1, build_options);
const char * build_options = L2Grad ? "-D L2GRAD":"";
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1, build_options);
}
void canny::calcMap_gpu(oclMat &dx, oclMat &dy, oclMat &mag, oclMat &map, int rows, int cols, float low_thresh, float high_thresh)
@ -328,7 +328,7 @@ void canny::calcMap_gpu(oclMat &dx, oclMat &dy, oclMat &mag, oclMat &map, int ro
string kernelName = "calcMap";
size_t localThreads[3] = {16, 16, 1};
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
}
void canny::edgesHysteresisLocal_gpu(oclMat &map, oclMat &st1, void *counter, int rows, int cols)
@ -348,7 +348,7 @@ void canny::edgesHysteresisLocal_gpu(oclMat &map, oclMat &st1, void *counter, in
size_t globalThreads[3] = {cols, rows, 1};
size_t localThreads[3] = {16, 16, 1};
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
}
void canny::edgesHysteresisGlobal_gpu(oclMat &map, oclMat &st1, oclMat &st2, void *counter, int rows, int cols)
@ -378,7 +378,7 @@ void canny::edgesHysteresisGlobal_gpu(oclMat &map, oclMat &st1, oclMat &st2, voi
args.push_back( make_pair( sizeof(cl_int), (void *)&map.step));
args.push_back( make_pair( sizeof(cl_int), (void *)&map.offset));
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1, DISABLE);
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
openCLSafeCall(clEnqueueReadBuffer(*(cl_command_queue*)getoclCommandQueue(), (cl_mem)counter, 1, 0, sizeof(int), &count, 0, NULL, NULL));
std::swap(st1, st2);
}
@ -403,5 +403,5 @@ void canny::getEdges_gpu(oclMat &map, oclMat &dst, int rows, int cols)
size_t globalThreads[3] = {cols, rows, 1};
size_t localThreads[3] = {16, 16, 1};
openCLExecuteKernel2(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
openCLExecuteKernel(clCxt, &imgproc_canny, kernelName, globalThreads, localThreads, args, -1, -1);
}

28
modules/ocl/src/opencl/imgproc_canny.cl
View File

@ -297,6 +297,9 @@ calcMap
map_step /= sizeof(*map);
map_offset /= sizeof(*map);
mag += mag_offset;
map += map_offset;
__local float smem[18][18];
int gidx = get_global_id(0);
@ -389,7 +392,7 @@ edgesHysteresisLocal
(
__global int * map,
__global ushort2 * st,
volatile __global unsigned int * counter,
__global unsigned int * counter,
int rows,
int cols,
int map_step,
@ -399,6 +402,8 @@ edgesHysteresisLocal
map_step /= sizeof(*map);
map_offset /= sizeof(*map);
map += map_offset;
__local int smem[18][18];
int gidx = get_global_id(0);
@ -416,12 +421,12 @@ edgesHysteresisLocal
if(ly < 14)
{
smem[ly][lx] =
map[grp_idx + lx + min(grp_idy + ly, rows - 1) * map_step + map_offset];
map[grp_idx + lx + min(grp_idy + ly, rows - 1) * map_step];
}
if(ly < 4 && grp_idy + ly + 14 <= rows && grp_idx + lx <= cols)
{
smem[ly + 14][lx] =
map[grp_idx + lx + min(grp_idy + ly + 14, rows - 1) * map_step + map_offset];
map[grp_idx + lx + min(grp_idy + ly + 14, rows - 1) * map_step];
}
barrier(CLK_LOCAL_MEM_FENCE);
@ -482,14 +487,17 @@ edgesHysteresisLocal
__constant int c_dx[8] = {-1, 0, 1, -1, 1, -1, 0, 1};
__constant int c_dy[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
#define stack_size 512
__kernel
void edgesHysteresisGlobal
void
__attribute__((reqd_work_group_size(128,1,1)))
edgesHysteresisGlobal
(
__global int * map,
__global ushort2 * st1,
__global ushort2 * st2,
volatile __global int * counter,
__global int * counter,
int rows,
int cols,
int count,
@ -501,6 +509,8 @@ void edgesHysteresisGlobal
map_step /= sizeof(*map);
map_offset /= sizeof(*map);
map += map_offset;
int gidx = get_global_id(0);
int gidy = get_global_id(1);
@ -510,7 +520,7 @@ void edgesHysteresisGlobal
int grp_idx = get_group_id(0);
int grp_idy = get_group_id(1);
volatile __local unsigned int s_counter;
__local unsigned int s_counter;
__local unsigned int s_ind;
__local ushort2 s_st[stack_size];
@ -564,9 +574,9 @@ void edgesHysteresisGlobal
pos.x += c_dx[lidx & 7];
pos.y += c_dy[lidx & 7];
if (map[pos.x + map_offset + pos.y * map_step] == 1)
if (map[pos.x + pos.y * map_step] == 1)
{
map[pos.x + map_offset + pos.y * map_step] = 2;
map[pos.x + pos.y * map_step] = 2;
ind = atomic_inc(&s_counter);
@ -621,6 +631,6 @@ void getEdges
if(gidy < rows && gidx < cols)
{
dst[gidx + gidy * dst_step] = (uchar)(-(map[gidx + 1 + (gidy + 1) * map_step] >> 1));
dst[gidx + gidy * dst_step] = (uchar)(-(map[gidx + 1 + (gidy + 1) * map_step + map_offset] >> 1));
}
}

20
modules/ocl/test/test_canny.cpp
View File

@ -45,7 +45,6 @@
#include "precomp.hpp"
#ifdef HAVE_OPENCL
#define SHOW_RESULT 0
////////////////////////////////////////////////////////
// Canny
@ -59,13 +58,10 @@ PARAM_TEST_CASE(Canny, AppertureSize, L2gradient)
bool useL2gradient;
cv::Mat edges_gold;
//std::vector<cv::ocl::Info> oclinfo;
virtual void SetUp()
{
apperture_size = GET_PARAM(0);
useL2gradient = GET_PARAM(1);
//int devnums = getDevice(oclinfo);
//CV_Assert(devnums > 0);
}
};
@ -77,32 +73,18 @@ TEST_P(Canny, Accuracy)
double low_thresh = 50.0;
double high_thresh = 100.0;
cv::resize(img, img, cv::Size(512, 384));
cv::ocl::oclMat ocl_img = cv::ocl::oclMat(img);
cv::ocl::oclMat edges;
cv::ocl::Canny(ocl_img, edges, low_thresh, high_thresh, apperture_size, useL2gradient);
char filename [100];
sprintf(filename, "G:/Valve_edges_a%d_L2Grad%d.jpg", apperture_size, (int)useL2gradient);
cv::Mat edges_gold;
cv::Canny(img, edges_gold, low_thresh, high_thresh, apperture_size, useL2gradient);
#if SHOW_RESULT
cv::Mat edges_x2, ocl_edges(edges);
edges_x2.create(edges.rows, edges.cols * 2, edges.type());
edges_x2.setTo(0);
cv::add(edges_gold, cv::Mat(edges_x2, cv::Rect(0, 0, edges_gold.cols, edges_gold.rows)), cv::Mat(edges_x2, cv::Rect(0, 0, edges_gold.cols, edges_gold.rows)));
cv::add(ocl_edges, cv::Mat(edges_x2, cv::Rect(edges_gold.cols, 0, edges_gold.cols, edges_gold.rows)), cv::Mat(edges_x2, cv::Rect(edges_gold.cols, 0, edges_gold.cols, edges_gold.rows)));
cv::namedWindow("Canny result (left: cpu, right: ocl)");
cv::imshow("Canny result (left: cpu, right: ocl)", edges_x2);
cv::waitKey();
#endif //OUTPUT_RESULT
EXPECT_MAT_SIMILAR(edges_gold, edges, 1e-2);
}
INSTANTIATE_TEST_CASE_P(GPU_ImgProc, Canny, testing::Combine(
INSTANTIATE_TEST_CASE_P(OCL_ImgProc, Canny, testing::Combine(
testing::Values(AppertureSize(3), AppertureSize(5)),
testing::Values(L2gradient(false), L2gradient(true))));
#endif