从视频的一行中读出所有像素的RGB值，并保存

代码：

1.头文件

    

 #include <stdio.h>#include <cv.h>#include <highgui.h> 

 

2.自定义 Help 函数

void help() {printf("/n Read out RGB pixel values and store them to disk/nCall:/n""./ReadRGB/n""/n This will store to files blines.csv, glines.csv and rlines.csv/n/n");}

 

3.main函数部分

int main( int argc, char** argv ){ if(argc != 2) {help(); return -1;} cvNamedWindow( "Example9_1", CV_WINDOW_AUTOSIZE ); CvCapture* capture = cvCreateFileCapture( argv[1] );if(!capture) {printf("/nCouldn't open %s/n",argv[1]); help(); return -1;} CvPoint pt1 = cvPoint(10,10); CvPoint pt2 = cvPoint(20,20); int max_buffer; IplImage *rawImage; int r[10000],g[10000],b[10000]; FILE *fptrb = fopen("blines.csv","w"); //Store the data here FILE *fptrg = fopen("glines.csv","w"); // for each color channel FILE *fptrr = fopen("rlines.csv","w"); CvLineIterator iterator; //MAIN PROCESSING LOOP: for(;;){ if( !cvGrabFrame( capture )) break; rawImage = cvRetrieveFrame( capture ); max_buffer = cvInitLineIterator(rawImage,pt1,pt2,&iterator,8,0); cvShowImage( "Example9_1", rawImage ); int c = cvWaitKey(10); for(int j=0; j<max_buffer; j++){ fprintf(fptrb,"%d,", iterator.ptr[0]); //Write blue value fprintf(fptrg,"%d,", iterator.ptr[1]); //green fprintf(fptrr,"%d,", iterator.ptr[2]); //red iterator.ptr[2] = 255; //Mark this sample in red CV_NEXT_LINE_POINT(iterator); //Step to the next pixel } //OUTPUT THE DATA IN ROWS: fprintf(fptrb,"/n");fprintf(fptrg,"/n");fprintf(fptrr,"/n"); } //CLEAN UP: printf("/nData stored to files: blines.csv, glines.csv and rlines.csv/n/n"); fclose(fptrb); fclose(fptrg); fclose(fptrr); cvReleaseCapture( &capture ); cvDestroyWindow( "Example9_1" );}