workImg：当前工作图像（全局）；
img3：Sobel_edge结果；
m_imagetype:图像类型（全局）；
OnEdgedetSobel() { IplImage *img = cvCreateImage( cvGetSize(workImg), IPL_DEPTH_16S, 1); if(workImg->nChannels==3) OnColorToGray(); //img=workImg; imageClone(workImg,&img); cvFlip(img); IplImage *img2 = cvCreateImage( cvGetSize(img), IPL_DEPTH_16S, 1);//当输入图像是 8 位的，要求输出图像是 16 位的 IplImage *img3 = cvCreateImage( cvGetSize(img), IPL_DEPTH_8U, 1); cvSobel( img, img2, 1, 0); cvConvertScaleAbs(img2,img3,1,0); cvReleaseImage(&img); cvReleaseImage(&img2); cvFlip(img3); m_dibFlag=imageReplace(img3,&workImg); m_ImageType=1; Invalidate();