11 static cv::UMat image;
16 static cv::Rect selection;
21     static cv::Point origin;  in onMouse()
30         selection &= cv::Rect(0, 0, image.cols, image.rows);  in onMouse()
35     case cv::EVENT_LBUTTONDOWN:  in onMouse()
36         origin = cv::Point(x, y);  in onMouse()
37         selection = cv::Rect(x, y, 0, 0);  in onMouse()
40     case cv::EVENT_LBUTTONUP:  in onMouse()
72     cv::VideoCapture cap;  in main()
73     cv::Rect trackWindow;  in main()
78     cv::CommandLineParser parser(argc, argv, keys);  in main()
94     cv::namedWindow("Histogram", cv::WINDOW_NORMAL);  in main()
95     cv::namedWindow("CamShift Demo", cv::WINDOW_NORMAL);  in main()
96     cv::setMouseCallback("CamShift Demo", onMouse);  in main()
97     cv::createTrackbar("Vmin", "CamShift Demo", &vmin, 256);  in main()
98     cv::createTrackbar("Vmax", "CamShift Demo", &vmax, 256);  in main()
99     cv::createTrackbar("Smin", "CamShift Demo", &smin, 256);  in main()
101     cv::Mat frame, histimg(200, 320, CV_8UC3, cv::Scalar::all(0));  in main()
102     cv::UMat hsv, hist, hue, mask, backproj;  in main()
118             cv::cvtColor(image, hsv, cv::COLOR_BGR2HSV);  in main()
124                 cv::inRange(hsv, cv::Scalar(0, smin, std::min(_vmin, _vmax)),  in main()
125                         cv::Scalar(180, 256, std::max(_vmin, _vmax)), mask);  in main()
129 …          cv::mixChannels(std::vector<cv::UMat>(1, hsv), std::vector<cv::UMat>(1, hue), fromTo, 1);  in main()
133                     cv::UMat roi(hue, selection), maskroi(mask, selection);  in main()
134 …         cv::calcHist(std::vector<cv::Mat>(1, roi.getMat(cv::ACCESS_READ)), std::vector<int>(1, 0),  in main()
136                     cv::normalize(hist, hist, 0, 255, cv::NORM_MINMAX);  in main()
141                     histimg = cv::Scalar::all(0);  in main()
143                     cv::Mat buf (1, hsize, CV_8UC3);  in main()
145 …                buf.at<cv::Vec3b>(i) = cv::Vec3b(cv::saturate_cast<uchar>(i*180./hsize), 255, 255);  in main()
146                     cv::cvtColor(buf, buf, cv::COLOR_HSV2BGR);  in main()
149                         cv::Mat _hist = hist.getMat(cv::ACCESS_READ);  in main()
152                             int val = cv::saturate_cast<int>(_hist.at<float>(i)*histimg.rows/255);  in main()
153                             cv::rectangle(histimg, cv::Point(i*binW, histimg.rows),  in main()
154                                        cv::Point((i+1)*binW, histimg.rows - val),  in main()
155                                        cv::Scalar(buf.at<cv::Vec3b>(i)), -1, 8);  in main()
160 …         cv::calcBackProject(std::vector<cv::UMat>(1, hue), std::vector<int>(1, 0), hist, backproj,  in main()
162                 cv::bitwise_and(backproj, mask, backproj);  in main()
164                 cv::RotatedRect trackBox = cv::CamShift(backproj, trackWindow,  in main()
165 …                         cv::TermCriteria(cv::TermCriteria::EPS | cv::TermCriteria::COUNT, 10, 1));  in main()
169                     trackWindow = cv::Rect(trackWindow.x - r, trackWindow.y - r,  in main()
171                                   cv::Rect(0, 0, cols, rows);  in main()
175                     cv::cvtColor(backproj, image, cv::COLOR_GRAY2BGR);  in main()
178                     cv::Mat _image = image.getMat(cv::ACCESS_RW);  in main()
179                     cv::ellipse(_image, trackBox, cv::Scalar(0, 0, 255), 3, cv::LINE_AA);  in main()
188             cv::UMat roi(image, selection);  in main()
189             cv::bitwise_not(roi, roi);  in main()
192         cv::imshow("CamShift Demo", image);  in main()
194             cv::imshow("Histogram", histimg);  in main()
196         char c = (char)cv::waitKey(10);  in main()
207             histimg = cv::Scalar::all(0);  in main()
212                 cv::destroyWindow("Histogram");  in main()
214                 cv::namedWindow("Histogram", cv::WINDOW_AUTOSIZE);  in main()
220             cv::ocl::setUseOpenCL(!cv::ocl::useOpenCL());  in main()