opencv 读取 yuv(4:2:0)

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#include <opencv/highgui.h>#include <stdio.h> //#include <>#define nWidth 352#define nHeight 288#define FrameSize nWidth*nHeight*3/2int _tmain(int argc, _TCHAR* argv[]){ /*IplImage *img = cvLoadImage("D:\\workspace\\cv_yun\\DSC_1598.JPG"); cvNamedWindow("a"); cvShowImage("a",img); cvWaitKey(0); */ FILE *f ; if(!(f = fopen("目录\\foreman_cif.yuv","rb"))) {  printf("file open error!"); } // calculate the frame num fseek(f, 0, SEEK_END); int frame_count = 0; long file_size = 0; frame_count = (int) ((int)ftell(f)/((nWidth * nHeight * 3) / 2));  // ftell 用于求文件大小 printf("frame num is %d \n", frame_count); printf("file length is   %d",ftell(f)); fseek(f, 0, SEEK_SET);//文件内位置定位到文件头 //IplImage *img = cvCreateImage(cvSize(352,288),IPL_DEPTH_8U,1); //IplImage *grey; IplImage *yimg = cvCreateImage(cvSize(nWidth, nHeight),IPL_DEPTH_8U,1); //IplImage *uimg = cvCreateImageHeader(cvSize(nWidth/2, nHeight/2),IPL_DEPTH_8U,1);      //IplImage *vimg = cvCreateImageHeader(cvSize(nWidth/2, nHeight/2),IPL_DEPTH_8U,1);  //----------------------------------------------------------------------实现读取一个文件 显示照片 unsigned char *pBuf = new unsigned char[nWidth*nHeight*3/2]; fread(pBuf, 1, (nWidth * nHeight * 3) / 2, f);// nWidth*nHeight*3/2  means 本程序使用 yuv:4:2:0 yuv分为 Y Cb Cr 三部分 cvSetData(yimg, pBuf, nWidth); cvNamedWindow("a"); cvShowImage("a", yimg); cvWaitKey( 0 ); //----------------------------------------------------------------------读取yuv文件的y部分 类似于播放器效果  /*unsigned char *pBuf = new unsigned char[nWidth*nHeight*3/2]; int pos = 0; for(int i = 0; i<frame_count-1; i++ ) {  fseek(f, pos, SEEK_SET);  fread(pBuf,1 , FrameSize, f );  cvSetData(yimg, pBuf, nWidth);  cvNamedWindow("a");  cvShowImage("a", yimg);  cvWaitKey( 33 );  pos += FrameSize; } */ cvDestroyWindow("a"); cvReleaseImage(&yimg); delete []pBuf; fclose(f); return 0;}

原文链接http://blog.csdn.net/david412306524/article/details/7672517

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