我試圖檢測使用cvblob
的對象。所以我用cvRenderBlob()
的方法。程序編譯成功,但在運行時它返回一個未處理的異常。當我把它分解時,箭頭指向語句中的cvRenderBlob()
方法定義中的cvblob.cpp文件。但如果我使用cvRenderBlobs()
方法它工作正常。我只需要檢測一個最大的斑點。有人請幫我處理這個例外。 這裏是我的VC++代碼,OpenCV cvblob - 渲染斑點
CvCapture* capture = 0;
IplImage* frame = 0;
int key = 0;
CvBlobs blobs;
CvBlob *blob;
capture = cvCaptureFromCAM(0);
if (!capture) {
printf("Could not initialize capturing....\n");
return 1;
}
int screenx = GetSystemMetrics(SM_CXSCREEN);
int screeny = GetSystemMetrics(SM_CYSCREEN);
while (key!='q') {
frame = cvQueryFrame(capture);
if (!frame) break;
IplImage* imgHSV = cvCreateImage(cvGetSize(frame), 8, 3);
cvCvtColor(frame, imgHSV, CV_BGR2HSV);
IplImage* imgThreshed = cvCreateImage(cvGetSize(frame), 8, 1);
cvInRangeS(imgHSV, cvScalar(61, 156, 205),cvScalar(161, 256, 305), imgThreshed); // for light blue color
IplImage* imgThresh = imgThreshed;
cvSmooth(imgThresh, imgThresh, CV_GAUSSIAN, 9, 9);
cvNamedWindow("Thresh");
cvShowImage("Thresh", imgThresh);
IplImage* labelImg = cvCreateImage(cvGetSize(imgHSV), IPL_DEPTH_LABEL, 1);
unsigned int result = cvLabel(imgThresh, labelImg, blobs);
blob = blobs[cvGreaterBlob(blobs)];
cvRenderBlob(labelImg, blob, frame, frame);
/*cvRenderBlobs(labelImg, blobs, frame, frame);*/
/*cvFilterByArea(blobs, 60, 500);*/
cvFilterByLabel(blobs, cvGreaterBlob(blobs));
cvNamedWindow("Video");
cvShowImage("Video", frame);
key = cvWaitKey(1);
}
cvDestroyWindow("Thresh");
cvDestroyWindow("Video");
cvReleaseCapture(&capture);