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155 lines
6.1 KiB
C++
155 lines
6.1 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// Intel License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000, Intel Corporation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "test_precomp.hpp"
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namespace opencv_test { namespace {
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//
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// TODO!!!:
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// check_slice (and/or check) seem(s) to be broken, or this is a bug in function
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// (or its inability to handle possible self-intersections in the generated contours).
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//
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// At least, if // return TotalErrors;
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// is uncommented in check_slice, the test fails easily.
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// So, now (and it looks like since 0.9.6)
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// we only check that the set of vertices of the approximated polygon is
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// a subset of vertices of the original contour.
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//
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//Tests to make sure that unreasonable epsilon (error)
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//values never get passed to the Douglas-Peucker algorithm.
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TEST(Imgproc_ApproxPoly, bad_epsilon)
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{
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std::vector<Point2f> inputPoints;
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inputPoints.push_back(Point2f(0.0f, 0.0f));
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std::vector<Point2f> outputPoints;
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double eps = std::numeric_limits<double>::infinity();
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ASSERT_ANY_THROW(approxPolyDP(inputPoints, outputPoints, eps, false));
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eps = 9e99;
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ASSERT_ANY_THROW(approxPolyDP(inputPoints, outputPoints, eps, false));
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eps = -1e-6;
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ASSERT_ANY_THROW(approxPolyDP(inputPoints, outputPoints, eps, false));
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eps = NAN;
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ASSERT_ANY_THROW(approxPolyDP(inputPoints, outputPoints, eps, false));
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}
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struct ApproxPolyN: public testing::Test
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{
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void SetUp()
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{
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vector<vector<Point>> inputPoints = {
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{ {87, 103}, {100, 112}, {96, 138}, {80, 169}, {60, 183}, {38, 176}, {41, 145}, {56, 118}, {76, 104} },
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{ {196, 102}, {205, 118}, {174, 196}, {152, 207}, {102, 194}, {100, 175}, {131, 109} },
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{ {372, 101}, {377, 119}, {337, 238}, {324, 248}, {240, 229}, {199, 214}, {232, 123}, {245, 103} },
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{ {463, 86}, {563, 112}, {574, 135}, {596, 221}, {518, 298}, {412, 266}, {385, 164}, {462, 86} }
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};
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Mat image(600, 600, CV_8UC1, Scalar(0));
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for (vector<Point>& polygon : inputPoints) {
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polylines(image, { polygon }, true, Scalar(255), 1);
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}
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findContours(image, contours, RETR_LIST, CHAIN_APPROX_NONE);
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}
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vector<vector<Point>> contours;
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};
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TEST_F(ApproxPolyN, accuracyInt)
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{
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vector<vector<Point>> rightCorners = {
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{ {72, 187}, {37, 176}, {42, 127}, {133, 64} },
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{ {168, 212}, {92, 192}, {131, 109}, {213, 100} },
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{ {72, 187}, {37, 176}, {42, 127}, {133, 64} },
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{ {384, 100}, {333, 251}, {197, 220}, {239, 103} },
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{ {168, 212}, {92, 192}, {131, 109}, {213, 100} },
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{ {333, 251}, {197, 220}, {239, 103}, {384, 100} },
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{ {542, 6}, {596, 221}, {518, 299}, {312, 236} },
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{ {596, 221}, {518, 299}, {312, 236}, {542, 6} }
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};
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EXPECT_EQ(rightCorners.size(), contours.size());
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for (size_t i = 0; i < contours.size(); ++i) {
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std::vector<Point> corners;
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approxPolyN(contours[i], corners, 4, -1, true);
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ASSERT_EQ(rightCorners[i], corners );
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}
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}
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TEST_F(ApproxPolyN, accuracyFloat)
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{
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vector<vector<Point2f>> rightCorners = {
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{ {72.f, 187.f}, {37.f, 176.f}, {42.f, 127.f}, {133.f, 64.f} },
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{ {168.f, 212.f}, {92.f, 192.f}, {131.f, 109.f}, {213.f, 100.f} },
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{ {72.f, 187.f}, {37.f, 176.f}, {42.f, 127.f}, {133.f, 64.f} },
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{ {384.f, 100.f}, {333.f, 251.f}, {197.f, 220.f}, {239.f, 103.f} },
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{ {168.f, 212.f}, {92.f, 192.f}, {131.f, 109.f}, {213.f, 100.f} },
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{ {333.f, 251.f}, {197.f, 220.f}, {239.f, 103.f}, {384.f, 100.f} },
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{ {542.f, 6.f}, {596.f, 221.f}, {518.f, 299.f}, {312.f, 236.f} },
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{ {596.f, 221.f}, {518.f, 299.f}, {312.f, 236.f}, {542.f, 6.f} }
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};
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EXPECT_EQ(rightCorners.size(), contours.size());
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for (size_t i = 0; i < contours.size(); ++i) {
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std::vector<Point2f> corners;
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approxPolyN(contours[i], corners, 4, -1, true);
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EXPECT_LT(cvtest::norm(rightCorners[i], corners, NORM_INF), .5f);
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}
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}
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TEST_F(ApproxPolyN, bad_args)
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{
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Mat contour(10, 1, CV_32FC2);
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vector<vector<Point>> bad_contours;
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vector<Point> corners;
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ASSERT_ANY_THROW(approxPolyN(contour, corners, 0));
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ASSERT_ANY_THROW(approxPolyN(contour, corners, 3, 0));
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ASSERT_ANY_THROW(approxPolyN(bad_contours, corners, 4));
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}
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}} // namespace
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