74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
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#include <opencv2/opencv.hpp>
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#include <iostream>
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using namespace std;
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using namespace cv;
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// ȫ<>ֱ<EFBFBD><D6B1><EFBFBD>ͼ<EFBFBD><CDBC>Դ
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cv::Mat srcImage;
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// <20><>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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cv::Rect roiRect;
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// <20><>ʼ<EFBFBD><CABC>
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cv::Point startPoint;
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// <20><>ֹ<EFBFBD><D6B9>
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cv::Point endPoint;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־λ
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bool downFlag = false;
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bool upFlag = false;
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void MouseEvent(int event, int x, int y, int flags, void* data)
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{
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><>ȡ<EFBFBD><C8A1>ʼ<EFBFBD><CABC>
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if (event == EVENT_LBUTTONDOWN)
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{
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downFlag = true;
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startPoint.x = x;
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startPoint.y = y;
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}
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// <20><><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><CFB5>ɿ<EFBFBD> <20><>ȡ<EFBFBD><C8A1>ֹ<EFBFBD><D6B9>
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if (event == EVENT_LBUTTONUP)
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{
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upFlag = true;
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endPoint.x = x;
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endPoint.y = y;
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}
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// <20><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if (downFlag == true && upFlag == false)
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{
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Point tempPoint;
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tempPoint.x = x;
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tempPoint.y = y;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾͼ<CABE><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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cv::Mat tempImage = srcImage.clone();
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cv::rectangle(tempImage, startPoint, tempPoint,
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Scalar(255, 0, 0), 2, 3, 0);
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cv::imshow("ROIing", tempImage);
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} // ѡ<><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if (downFlag == true && upFlag == true)
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{
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// <20><>ȡѡ<C8A1><D1A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ROI
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roiRect.width = abs(startPoint.x - endPoint.x);
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roiRect.height = abs(startPoint.y - endPoint.y);
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roiRect.x = min(startPoint.x, endPoint.x);
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roiRect.y = min(startPoint.y, endPoint.y);
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cv::Mat roiMat(srcImage, roiRect);
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imshow("ROI", roiMat);
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downFlag = false;
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upFlag = false;
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}
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cv::waitKey(0);
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}
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int main(int argc, char** argv)
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{
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// <20><>ȡͼ<C8A1><CDBC><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><D0B6>Ƿ<EFBFBD><C7B7><EFBFBD>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD>
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srcImage = cv::imread("./vedio/test.jpg");
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if (srcImage.empty())
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return -1;
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// <20>ص<EFBFBD><D8B5>¼<EFBFBD><C2BC><EFBFBD>Ӧ
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cv::namedWindow("ROIing");
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cv::imshow("ROIing", srcImage);
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cv::setMouseCallback("ROIing", MouseEvent, 0);
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cv::waitKey(0);
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return 0;
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}
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