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Open Source Computer Vision Library
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70 lines
2.4 KiB
70 lines
2.4 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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#include <vector> |
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#include <cmath> |
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using namespace cv; |
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using namespace std; |
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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 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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