MeanShitf 예제

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main() {
        VideoCapture cap = VideoCapture(0);
        if (!cap.isOpened()) {
                cout << "Could't load camera" << endl;
                return -1;
        }

        cap.set(CAP_PROP_FRAME_WIDTH, 640);
        cap.set(CAP_PROP_FRAME_HEIGHT, 480);

        int channels[] = { 0, 1 };  // 히스토그램에는 Hue와 Saturation 채널만 사용합니다.
        int histSize[] = { 180, 256 };  // Hue와 Saturation 채널의 빈(bin) 개수
        float hueRange[] = { 0, 180 };  // Hue 값 범위
        float satRange[] = { 0, 256 };  // Saturation 값 범위
        const float* ranges[] = { hueRange, satRange };

        Mat frame, hsv_frame, ROI_frame;
        Rect2d roi_pt;
        namedWindow("frame");

        while(1) {
                cap >> frame;
                if (frame.empty()) {
                        cout << "Could't load frame" << endl;
                        return -1;
                }

                if (!roi_pt.empty()) {
                        cvtColor(frame, hsv_frame, COLOR_BGR2HSV);
                        ROI_frame = hsv_frame(roi_pt);
                        imshow("ROI_frame", ROI_frame);

                }
                else {
                        putText(frame, "Hit the Space to set target to track", Point(10, 30), FONT_HERSHEY_SIMPLEX,
                                1, Scalar(0, 0, 255), 1);
                }

                int key = waitKey(33);
                if (key == 27) break;
                else if (key == 32) {
                        roi_pt = selectROI("frame", frame, false, false);
                }

                imshow("frame", frame);
        }

        cap.release();
        destroyAllWindows();
        return 0;
}