558 lines
21 KiB
C++
558 lines
21 KiB
C++
/*
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By downloading, copying, installing or using the software you agree to this
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license. 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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License Agreement
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For Open Source Computer Vision Library
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(3-clause BSD License)
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Copyright (C) 2013, OpenCV Foundation, all rights reserved.
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Third party copyrights are property of their respective owners.
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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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* Redistributions 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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* Redistributions 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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* Neither the names of the copyright holders nor the names of the contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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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
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disclaimed. In no event shall copyright holders or contributors be liable for
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any direct, 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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#include "test_precomp.hpp"
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namespace opencv_test { namespace {
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/**
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* @brief Draw 2D synthetic markers and detect them
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*/
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class CV_ArucoDetectionSimple : public cvtest::BaseTest {
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public:
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CV_ArucoDetectionSimple();
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protected:
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void run(int);
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};
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CV_ArucoDetectionSimple::CV_ArucoDetectionSimple() {}
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void CV_ArucoDetectionSimple::run(int) {
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Ptr<aruco::Dictionary> dictionary = aruco::getPredefinedDictionary(aruco::DICT_6X6_250);
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// 20 images
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for(int i = 0; i < 20; i++) {
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const int markerSidePixels = 100;
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int imageSize = markerSidePixels * 2 + 3 * (markerSidePixels / 2);
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// draw synthetic image and store marker corners and ids
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vector< vector< Point2f > > groundTruthCorners;
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vector< int > groundTruthIds;
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Mat img = Mat(imageSize, imageSize, CV_8UC1, Scalar::all(255));
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for(int y = 0; y < 2; y++) {
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for(int x = 0; x < 2; x++) {
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Mat marker;
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int id = i * 4 + y * 2 + x;
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aruco::drawMarker(dictionary, id, markerSidePixels, marker);
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Point2f firstCorner =
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Point2f(markerSidePixels / 2.f + x * (1.5f * markerSidePixels),
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markerSidePixels / 2.f + y * (1.5f * markerSidePixels));
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Mat aux = img.colRange((int)firstCorner.x, (int)firstCorner.x + markerSidePixels)
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.rowRange((int)firstCorner.y, (int)firstCorner.y + markerSidePixels);
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marker.copyTo(aux);
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groundTruthIds.push_back(id);
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groundTruthCorners.push_back(vector< Point2f >());
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groundTruthCorners.back().push_back(firstCorner);
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groundTruthCorners.back().push_back(firstCorner + Point2f(markerSidePixels - 1, 0));
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groundTruthCorners.back().push_back(
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firstCorner + Point2f(markerSidePixels - 1, markerSidePixels - 1));
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groundTruthCorners.back().push_back(firstCorner + Point2f(0, markerSidePixels - 1));
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}
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}
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if(i % 2 == 1) img.convertTo(img, CV_8UC3);
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// detect markers
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vector< vector< Point2f > > corners;
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vector< int > ids;
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Ptr<aruco::DetectorParameters> params = aruco::DetectorParameters::create();
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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// check detection results
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for(unsigned int m = 0; m < groundTruthIds.size(); m++) {
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int idx = -1;
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for(unsigned int k = 0; k < ids.size(); k++) {
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if(groundTruthIds[m] == ids[k]) {
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idx = (int)k;
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break;
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}
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}
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if(idx == -1) {
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ts->printf(cvtest::TS::LOG, "Marker not detected");
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ts->set_failed_test_info(cvtest::TS::FAIL_MISMATCH);
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return;
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}
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for(int c = 0; c < 4; c++) {
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double dist = cv::norm(groundTruthCorners[m][c] - corners[idx][c]); // TODO cvtest
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if(dist > 0.001) {
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ts->printf(cvtest::TS::LOG, "Incorrect marker corners position");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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}
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}
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}
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}
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static double deg2rad(double deg) { return deg * CV_PI / 180.; }
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/**
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* @brief Get rvec and tvec from yaw, pitch and distance
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*/
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static void getSyntheticRT(double yaw, double pitch, double distance, Mat &rvec, Mat &tvec) {
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rvec = Mat(3, 1, CV_64FC1);
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tvec = Mat(3, 1, CV_64FC1);
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// Rvec
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// first put the Z axis aiming to -X (like the camera axis system)
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Mat rotZ(3, 1, CV_64FC1);
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rotZ.ptr< double >(0)[0] = 0;
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rotZ.ptr< double >(0)[1] = 0;
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rotZ.ptr< double >(0)[2] = -0.5 * CV_PI;
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Mat rotX(3, 1, CV_64FC1);
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rotX.ptr< double >(0)[0] = 0.5 * CV_PI;
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rotX.ptr< double >(0)[1] = 0;
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rotX.ptr< double >(0)[2] = 0;
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Mat camRvec, camTvec;
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composeRT(rotZ, Mat(3, 1, CV_64FC1, Scalar::all(0)), rotX, Mat(3, 1, CV_64FC1, Scalar::all(0)),
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camRvec, camTvec);
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// now pitch and yaw angles
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Mat rotPitch(3, 1, CV_64FC1);
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rotPitch.ptr< double >(0)[0] = 0;
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rotPitch.ptr< double >(0)[1] = pitch;
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rotPitch.ptr< double >(0)[2] = 0;
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Mat rotYaw(3, 1, CV_64FC1);
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rotYaw.ptr< double >(0)[0] = yaw;
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rotYaw.ptr< double >(0)[1] = 0;
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rotYaw.ptr< double >(0)[2] = 0;
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composeRT(rotPitch, Mat(3, 1, CV_64FC1, Scalar::all(0)), rotYaw,
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Mat(3, 1, CV_64FC1, Scalar::all(0)), rvec, tvec);
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// compose both rotations
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composeRT(camRvec, Mat(3, 1, CV_64FC1, Scalar::all(0)), rvec,
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Mat(3, 1, CV_64FC1, Scalar::all(0)), rvec, tvec);
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// Tvec, just move in z (camera) direction the specific distance
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tvec.ptr< double >(0)[0] = 0.;
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tvec.ptr< double >(0)[1] = 0.;
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tvec.ptr< double >(0)[2] = distance;
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}
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/**
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* @brief Create a synthetic image of a marker with perspective
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*/
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static Mat projectMarker(Ptr<aruco::Dictionary> &dictionary, int id, Mat cameraMatrix, double yaw,
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double pitch, double distance, Size imageSize, int markerBorder,
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vector< Point2f > &corners, int encloseMarker=0) {
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// canonical image
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Mat marker, markerImg;
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const int markerSizePixels = 100;
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aruco::drawMarker(dictionary, id, markerSizePixels, marker, markerBorder);
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marker.copyTo(markerImg);
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if(encloseMarker){ //to enclose the marker
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int enclose = int(marker.rows/4);
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markerImg = Mat::zeros(marker.rows+(2*enclose), marker.cols+(enclose*2), CV_8UC1);
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Mat field= markerImg.rowRange(int(enclose), int(markerImg.rows-enclose))
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.colRange(int(0), int(markerImg.cols));
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field.setTo(255);
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field= markerImg.rowRange(int(0), int(markerImg.rows))
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.colRange(int(enclose), int(markerImg.cols-enclose));
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field.setTo(255);
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field = markerImg(Rect(enclose,enclose,marker.rows,marker.cols));
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marker.copyTo(field);
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}
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// get rvec and tvec for the perspective
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Mat rvec, tvec;
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getSyntheticRT(yaw, pitch, distance, rvec, tvec);
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const float markerLength = 0.05f;
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vector< Point3f > markerObjPoints;
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markerObjPoints.push_back(Point3f(-markerLength / 2.f, +markerLength / 2.f, 0));
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markerObjPoints.push_back(markerObjPoints[0] + Point3f(markerLength, 0, 0));
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markerObjPoints.push_back(markerObjPoints[0] + Point3f(markerLength, -markerLength, 0));
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markerObjPoints.push_back(markerObjPoints[0] + Point3f(0, -markerLength, 0));
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// project markers and draw them
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Mat distCoeffs(5, 1, CV_64FC1, Scalar::all(0));
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projectPoints(markerObjPoints, rvec, tvec, cameraMatrix, distCoeffs, corners);
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vector< Point2f > originalCorners;
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originalCorners.push_back(Point2f(0+float(encloseMarker*markerSizePixels/4), 0+float(encloseMarker*markerSizePixels/4)));
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originalCorners.push_back(originalCorners[0]+Point2f((float)markerSizePixels, 0));
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originalCorners.push_back(originalCorners[0]+Point2f((float)markerSizePixels, (float)markerSizePixels));
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originalCorners.push_back(originalCorners[0]+Point2f(0, (float)markerSizePixels));
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Mat transformation = getPerspectiveTransform(originalCorners, corners);
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Mat img(imageSize, CV_8UC1, Scalar::all(255));
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Mat aux;
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const char borderValue = 127;
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warpPerspective(markerImg, aux, transformation, imageSize, INTER_NEAREST, BORDER_CONSTANT,
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Scalar::all(borderValue));
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// copy only not-border pixels
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for(int y = 0; y < aux.rows; y++) {
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for(int x = 0; x < aux.cols; x++) {
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if(aux.at< unsigned char >(y, x) == borderValue) continue;
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img.at< unsigned char >(y, x) = aux.at< unsigned char >(y, x);
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}
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}
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return img;
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}
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/**
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* @brief Draws markers in perspective and detect them
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*/
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class CV_ArucoDetectionPerspective : public cvtest::BaseTest {
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public:
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CV_ArucoDetectionPerspective();
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enum checkWithParameter{
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USE_APRILTAG=1, /// Detect marker candidates :: using AprilTag
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DETECT_INVERTED_MARKER, /// Check if there is a white marker
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};
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protected:
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void run(int);
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};
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CV_ArucoDetectionPerspective::CV_ArucoDetectionPerspective() {}
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void CV_ArucoDetectionPerspective::run(int tryWith) {
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int iter = 0;
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int szEnclosed = 0;
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Mat cameraMatrix = Mat::eye(3, 3, CV_64FC1);
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Size imgSize(500, 500);
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cameraMatrix.at< double >(0, 0) = cameraMatrix.at< double >(1, 1) = 650;
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cameraMatrix.at< double >(0, 2) = imgSize.width / 2;
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cameraMatrix.at< double >(1, 2) = imgSize.height / 2;
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Ptr<aruco::Dictionary> dictionary = aruco::getPredefinedDictionary(aruco::DICT_6X6_250);
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// detect from different positions
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for(double distance = 0.1; distance < 0.7; distance += 0.2) {
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for(int pitch = 0; pitch < 360; pitch += (distance == 0.1? 60:180)) {
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for(int yaw = 70; yaw <= 120; yaw += 40){
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int currentId = iter % 250;
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int markerBorder = iter % 2 + 1;
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iter++;
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vector< Point2f > groundTruthCorners;
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Ptr<aruco::DetectorParameters> params = aruco::DetectorParameters::create();
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params->minDistanceToBorder = 1;
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params->markerBorderBits = markerBorder;
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/// create synthetic image
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Mat img=
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projectMarker(dictionary, currentId, cameraMatrix, deg2rad(yaw), deg2rad(pitch),
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distance, imgSize, markerBorder, groundTruthCorners, szEnclosed);
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// marker :: Inverted
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if(CV_ArucoDetectionPerspective::DETECT_INVERTED_MARKER == tryWith){
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img = ~img;
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params->detectInvertedMarker = true;
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}
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if(CV_ArucoDetectionPerspective::USE_APRILTAG == tryWith){
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params->cornerRefinementMethod = cv::aruco::CORNER_REFINE_APRILTAG;
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}
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// detect markers
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vector< vector< Point2f > > corners;
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vector< int > ids;
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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// check results
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if(ids.size() != 1 || (ids.size() == 1 && ids[0] != currentId)) {
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if(ids.size() != 1)
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ts->printf(cvtest::TS::LOG, "Incorrect number of detected markers");
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else
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ts->printf(cvtest::TS::LOG, "Incorrect marker id");
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ts->set_failed_test_info(cvtest::TS::FAIL_MISMATCH);
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return;
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}
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for(int c = 0; c < 4; c++) {
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double dist = cv::norm(groundTruthCorners[c] - corners[0][c]); // TODO cvtest
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if(dist > 5) {
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ts->printf(cvtest::TS::LOG, "Incorrect marker corners position");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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}
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}
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}
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// change the state :: to detect an enclosed inverted marker
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if( CV_ArucoDetectionPerspective::DETECT_INVERTED_MARKER == tryWith && distance == 0.1 ){
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distance -= 0.1;
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szEnclosed++;
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}
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}
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}
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/**
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* @brief Check max and min size in marker detection parameters
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*/
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class CV_ArucoDetectionMarkerSize : public cvtest::BaseTest {
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public:
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CV_ArucoDetectionMarkerSize();
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protected:
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void run(int);
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};
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CV_ArucoDetectionMarkerSize::CV_ArucoDetectionMarkerSize() {}
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void CV_ArucoDetectionMarkerSize::run(int) {
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Ptr<aruco::Dictionary> dictionary = aruco::getPredefinedDictionary(aruco::DICT_6X6_250);
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int markerSide = 20;
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int imageSize = 200;
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// 10 cases
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for(int i = 0; i < 10; i++) {
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Mat marker;
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int id = 10 + i * 20;
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// create synthetic image
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Mat img = Mat(imageSize, imageSize, CV_8UC1, Scalar::all(255));
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aruco::drawMarker(dictionary, id, markerSide, marker);
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Mat aux = img.colRange(30, 30 + markerSide).rowRange(50, 50 + markerSide);
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marker.copyTo(aux);
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vector< vector< Point2f > > corners;
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vector< int > ids;
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Ptr<aruco::DetectorParameters> params = aruco::DetectorParameters::create();
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// set a invalid minMarkerPerimeterRate
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params->minMarkerPerimeterRate = min(4., (4. * markerSide) / float(imageSize) + 0.1);
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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if(corners.size() != 0) {
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ts->printf(cvtest::TS::LOG, "Error in DetectorParameters::minMarkerPerimeterRate");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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// set an valid minMarkerPerimeterRate
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params->minMarkerPerimeterRate = max(0., (4. * markerSide) / float(imageSize) - 0.1);
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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if(corners.size() != 1 || (corners.size() == 1 && ids[0] != id)) {
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ts->printf(cvtest::TS::LOG, "Error in DetectorParameters::minMarkerPerimeterRate");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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// set a invalid maxMarkerPerimeterRate
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params->maxMarkerPerimeterRate = min(4., (4. * markerSide) / float(imageSize) - 0.1);
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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if(corners.size() != 0) {
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ts->printf(cvtest::TS::LOG, "Error in DetectorParameters::maxMarkerPerimeterRate");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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// set an valid maxMarkerPerimeterRate
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params->maxMarkerPerimeterRate = max(0., (4. * markerSide) / float(imageSize) + 0.1);
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aruco::detectMarkers(img, dictionary, corners, ids, params);
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if(corners.size() != 1 || (corners.size() == 1 && ids[0] != id)) {
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ts->printf(cvtest::TS::LOG, "Error in DetectorParameters::maxMarkerPerimeterRate");
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ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
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return;
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}
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}
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}
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/**
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* @brief Check error correction in marker bits
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*/
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class CV_ArucoBitCorrection : public cvtest::BaseTest {
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public:
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CV_ArucoBitCorrection();
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protected:
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void run(int);
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};
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CV_ArucoBitCorrection::CV_ArucoBitCorrection() {}
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void CV_ArucoBitCorrection::run(int) {
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Ptr<aruco::Dictionary> _dictionary = aruco::getPredefinedDictionary(aruco::DICT_6X6_250);
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aruco::Dictionary &dictionary = *_dictionary;
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aruco::Dictionary dictionary2 = *_dictionary;
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int markerSide = 50;
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int imageSize = 150;
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Ptr<aruco::DetectorParameters> params = aruco::DetectorParameters::create();
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// 10 markers
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for(int l = 0; l < 10; l++) {
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Mat marker;
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int id = 10 + l * 20;
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Mat currentCodeBytes = dictionary.bytesList.rowRange(id, id + 1);
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// 5 valid cases
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for(int i = 0; i < 5; i++) {
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// how many bit errors (the error is low enough so it can be corrected)
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params->errorCorrectionRate = 0.2 + i * 0.1;
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int errors =
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(int)std::floor(dictionary.maxCorrectionBits * params->errorCorrectionRate - 1.);
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// create erroneous marker in currentCodeBits
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Mat currentCodeBits =
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aruco::Dictionary::getBitsFromByteList(currentCodeBytes, dictionary.markerSize);
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for(int e = 0; e < errors; e++) {
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currentCodeBits.ptr< unsigned char >()[2 * e] =
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!currentCodeBits.ptr< unsigned char >()[2 * e];
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}
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// add erroneous marker to dictionary2 in order to create the erroneous marker image
|
|
Mat currentCodeBytesError = aruco::Dictionary::getByteListFromBits(currentCodeBits);
|
|
currentCodeBytesError.copyTo(dictionary2.bytesList.rowRange(id, id + 1));
|
|
Mat img = Mat(imageSize, imageSize, CV_8UC1, Scalar::all(255));
|
|
dictionary2.drawMarker(id, markerSide, marker);
|
|
Mat aux = img.colRange(30, 30 + markerSide).rowRange(50, 50 + markerSide);
|
|
marker.copyTo(aux);
|
|
|
|
// try to detect using original dictionary
|
|
vector< vector< Point2f > > corners;
|
|
vector< int > ids;
|
|
aruco::detectMarkers(img, _dictionary, corners, ids, params);
|
|
if(corners.size() != 1 || (corners.size() == 1 && ids[0] != id)) {
|
|
ts->printf(cvtest::TS::LOG, "Error in bit correction");
|
|
ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// 5 invalid cases
|
|
for(int i = 0; i < 5; i++) {
|
|
// how many bit errors (the error is too high to be corrected)
|
|
params->errorCorrectionRate = 0.2 + i * 0.1;
|
|
int errors =
|
|
(int)std::floor(dictionary.maxCorrectionBits * params->errorCorrectionRate + 1.);
|
|
|
|
// create erroneous marker in currentCodeBits
|
|
Mat currentCodeBits =
|
|
aruco::Dictionary::getBitsFromByteList(currentCodeBytes, dictionary.markerSize);
|
|
for(int e = 0; e < errors; e++) {
|
|
currentCodeBits.ptr< unsigned char >()[2 * e] =
|
|
!currentCodeBits.ptr< unsigned char >()[2 * e];
|
|
}
|
|
|
|
// dictionary3 is only composed by the modified marker (in its original form)
|
|
Ptr<aruco::Dictionary> _dictionary3 = makePtr<aruco::Dictionary>(
|
|
dictionary2.bytesList.rowRange(id, id + 1).clone(),
|
|
dictionary.markerSize,
|
|
dictionary.maxCorrectionBits);
|
|
|
|
// add erroneous marker to dictionary2 in order to create the erroneous marker image
|
|
Mat currentCodeBytesError = aruco::Dictionary::getByteListFromBits(currentCodeBits);
|
|
currentCodeBytesError.copyTo(dictionary2.bytesList.rowRange(id, id + 1));
|
|
Mat img = Mat(imageSize, imageSize, CV_8UC1, Scalar::all(255));
|
|
dictionary2.drawMarker(id, markerSide, marker);
|
|
Mat aux = img.colRange(30, 30 + markerSide).rowRange(50, 50 + markerSide);
|
|
marker.copyTo(aux);
|
|
|
|
// try to detect using dictionary3, it should fail
|
|
vector< vector< Point2f > > corners;
|
|
vector< int > ids;
|
|
aruco::detectMarkers(img, _dictionary3, corners, ids, params);
|
|
if(corners.size() != 0) {
|
|
ts->printf(cvtest::TS::LOG, "Error in DetectorParameters::errorCorrectionRate");
|
|
ts->set_failed_test_info(cvtest::TS::FAIL_BAD_ACCURACY);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
typedef CV_ArucoDetectionPerspective CV_AprilTagDetectionPerspective;
|
|
typedef CV_ArucoDetectionPerspective CV_InvertedArucoDetectionPerspective;
|
|
|
|
TEST(CV_InvertedArucoDetectionPerspective, algorithmic) {
|
|
CV_InvertedArucoDetectionPerspective test;
|
|
test.safe_run(CV_ArucoDetectionPerspective::DETECT_INVERTED_MARKER);
|
|
}
|
|
|
|
TEST(CV_AprilTagDetectionPerspective, algorithmic) {
|
|
CV_AprilTagDetectionPerspective test;
|
|
test.safe_run(CV_ArucoDetectionPerspective::USE_APRILTAG);
|
|
}
|
|
|
|
TEST(CV_ArucoDetectionSimple, algorithmic) {
|
|
CV_ArucoDetectionSimple test;
|
|
test.safe_run();
|
|
}
|
|
|
|
TEST(CV_ArucoDetectionPerspective, algorithmic) {
|
|
CV_ArucoDetectionPerspective test;
|
|
test.safe_run();
|
|
}
|
|
|
|
TEST(CV_ArucoDetectionMarkerSize, algorithmic) {
|
|
CV_ArucoDetectionMarkerSize test;
|
|
test.safe_run();
|
|
}
|
|
|
|
TEST(CV_ArucoBitCorrection, algorithmic) {
|
|
CV_ArucoBitCorrection test;
|
|
test.safe_run();
|
|
}
|
|
|
|
}} // namespace
|