hw06

 for(int i=0; i<50; i++)//延遲50張照片
        frame = cvQueryFrame(capture);
       
    cvFlip( frame, 0, 0);
    cvCvtColor(frame, background1, CV_BGR2GRAY);//把fame的顏色轉為CV_BGR2GRAY到background1
    background2=cvCloneImage(background1);//把background1複製到background2

    while(true)
    {
        frame = cvQueryFrame(capture);      
        cvFlip( frame, 0, 0);
       
        cvCvtColor(frame, gray, CV_BGR2GRAY); //把fame的顏色轉為CV_BGR2GRAY到gray
        cvAbsDiff(gray, background1, difference1);//gray減掉background1到difference1取絕對值            
        cvFlip( difference1, 0, 0);
        cvThreshold(difference1,difference1,60,255,CV_THRESH_BINARY);//如果色階大於31變255 小於60變0
        cvAbsDiff(gray, background2, difference2);//gray減掉background2到difference2取絕對值
        cvFlip( difference2, 0, 0);
        cvThreshold(difference2,difference2, 60,255,CV_THRESH_BINARY);
       
        background2=cvCloneImage(gray);//把gray複製到background2
       
        cvFlip( frame, 0, 0);
        cvShowImage("Webcam",frame);
        cvShowImage("Webcam1",difference1);
        cvShowImage("Webcam2",difference2);
   
        if(cvWaitKey(10)>0)     break;
    }

圖像顏色的轉換