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Open Source Computer Vision Library
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105 lines
3.6 KiB
105 lines
3.6 KiB
// This file is part of OpenCV project. |
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// It is subject to the license terms in the LICENSE file found in the top-level directory |
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// of this distribution and at http://opencv.org/license.html. |
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// |
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// Copyright (C) 2016, Itseez, Inc, all rights reserved. |
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#include "test_precomp.hpp" |
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namespace opencv_test { namespace { |
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// return true if point lies inside ellipse |
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static bool check_pt_in_ellipse(const Point2f& pt, const RotatedRect& el) { |
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Point2f to_pt = pt - el.center; |
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double pt_angle = atan2(to_pt.y, to_pt.x); |
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double el_angle = el.angle * CV_PI / 180; |
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double x_dist = 0.5 * el.size.width * cos(pt_angle + el_angle); |
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double y_dist = 0.5 * el.size.height * sin(pt_angle + el_angle); |
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double el_dist = sqrt(x_dist * x_dist + y_dist * y_dist); |
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return cv::norm(to_pt) < el_dist; |
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} |
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// Return true if mass center of fitted points lies inside ellipse |
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static bool fit_and_check_ellipse(const vector<Point2f>& pts) { |
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RotatedRect ellipse = fitEllipseDirect(pts); // fitEllipseAMS() also works fine |
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Point2f mass_center; |
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for (size_t i = 0; i < pts.size(); i++) { |
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mass_center += pts[i]; |
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} |
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mass_center /= (float)pts.size(); |
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return check_pt_in_ellipse(mass_center, ellipse); |
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} |
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TEST(Imgproc_FitEllipse_Issue_4515, accuracy) { |
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vector<Point2f> pts; |
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pts.push_back(Point2f(327, 317)); |
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pts.push_back(Point2f(328, 316)); |
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pts.push_back(Point2f(329, 315)); |
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pts.push_back(Point2f(330, 314)); |
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pts.push_back(Point2f(331, 314)); |
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pts.push_back(Point2f(332, 314)); |
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pts.push_back(Point2f(333, 315)); |
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pts.push_back(Point2f(333, 316)); |
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pts.push_back(Point2f(333, 317)); |
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pts.push_back(Point2f(333, 318)); |
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pts.push_back(Point2f(333, 319)); |
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pts.push_back(Point2f(333, 320)); |
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EXPECT_TRUE(fit_and_check_ellipse(pts)); |
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} |
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TEST(Imgproc_FitEllipse_Issue_6544, accuracy) { |
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vector<Point2f> pts; |
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pts.push_back(Point2f(924.784f, 764.160f)); |
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pts.push_back(Point2f(928.388f, 615.903f)); |
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pts.push_back(Point2f(847.4f, 888.014f)); |
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pts.push_back(Point2f(929.406f, 741.675f)); |
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pts.push_back(Point2f(904.564f, 825.605f)); |
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pts.push_back(Point2f(926.742f, 760.746f)); |
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pts.push_back(Point2f(863.479f, 873.406f)); |
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pts.push_back(Point2f(910.987f, 808.863f)); |
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pts.push_back(Point2f(929.145f, 744.976f)); |
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pts.push_back(Point2f(917.474f, 791.823f)); |
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EXPECT_TRUE(fit_and_check_ellipse(pts)); |
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} |
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TEST(Imgproc_FitEllipse_Issue_10270, accuracy) { |
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vector<Point2f> pts; |
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float scale = 1; |
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Point2f shift(0, 0); |
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pts.push_back(Point2f(0, 1)*scale+shift); |
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pts.push_back(Point2f(0, 2)*scale+shift); |
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pts.push_back(Point2f(0, 3)*scale+shift); |
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pts.push_back(Point2f(2, 3)*scale+shift); |
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pts.push_back(Point2f(0, 4)*scale+shift); |
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// check that we get almost vertical ellipse centered around (1, 3) |
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RotatedRect e = fitEllipse(pts); |
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EXPECT_LT(std::min(fabs(e.angle-180), fabs(e.angle)), 10.); |
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EXPECT_NEAR(e.center.x, 1, 1); |
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EXPECT_NEAR(e.center.y, 3, 1); |
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EXPECT_LT(e.size.width*3, e.size.height); |
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} |
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TEST(Imgproc_FitEllipse_JavaCase, accuracy) { |
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vector<Point2f> pts; |
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float scale = 1; |
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Point2f shift(0, 0); |
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pts.push_back(Point2f(0, 0)*scale+shift); |
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pts.push_back(Point2f(1, 1)*scale+shift); |
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pts.push_back(Point2f(-1, 1)*scale+shift); |
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pts.push_back(Point2f(-1, -1)*scale+shift); |
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pts.push_back(Point2f(1, -1)*scale+shift); |
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// check that we get almost vertical ellipse centered around (1, 3) |
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RotatedRect e = fitEllipse(pts); |
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EXPECT_NEAR(e.center.x, 0, 0.01); |
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EXPECT_NEAR(e.center.y, 0, 0.01); |
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EXPECT_NEAR(e.size.width, sqrt(2.)*2, 0.4); |
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EXPECT_NEAR(e.size.height, sqrt(2.)*2, 0.4); |
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} |
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}} // namespace
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