几个opencv实例.doc

1加载图片 #include highgui.h int main( int argc, char** argv ) { IplImage* img = cvLoadImage( argv[1] );//加载图片 cvNamedWindow(Example1, CV_WINDOW_AUTOSIZE ); cvShowImage(Example1, img ); cvWaitKey(0); cvReleaseImage( img ); cvDestroyWindow(Example1); } 加载视频文件.avi #include highgui.h int main( int argc, char** argv ) { cvNamedWindow( Example2, CV_WINDOW_AUTOSIZE ); //CvCapture* capture = cvCaptureFromAVI( argv[1] ); // either one will work CvCapture* capture = cvCreateFileCapture( argv[1] ); IplImage* frame; while(1) { frame = cvQueryFrame( capture ); if( !frame ) break; cvShowImage( Example2, frame ); char c = cvWaitKey(33); if( c == 27 ) break; } cvReleaseCapture( capture ); cvDestroyWindow( Example2 ); } 3.给视频文件加滚动条 #include stdio.h #include iostream #include fstream #include cv.h #include highgui.h using namespace std; int g_slider_position = 0; CvCapture* g_capture = NULL; void onTrackbarSlide(int pos) { cvSetCaptureProperty( g_capture, CV_CAP_PROP_POS_FRAMES, pos ); } int getAVIFrames(char * fname) { char tempSize[4]; ifstream videoFile( fname , ios::in | ios::binary ); if ( !videoFile ) { cout Couldn鈥檛 open the input file fname endl; exit( 1 ); } videoFile.seekg( 0x30 , ios::beg ); videoFile.read( tempSize , 4 ); int frames = (unsigned char ) tempSize[0] + 0x100*(unsigned char ) tempSize[1] + 0x10000*(unsigned char ) tempSize[2] + 0x1000000*(unsigned char ) tempSize[3]; videoFile.close( ); return frames; } int main( int argc, char** argv ) { cvNamedWindow( Example2_3, CV_WINDOW_AUTOSIZE ); g_capture = cvCreateFileCapture( argv[1] ); IplImage *foo = cvQueryFrame( g_capture); int frames = (int) cvGetCaptureProperty( g_capture, CV_CAP_PROP_FRAME_COUNT ); int tmpw = (int) cvGetCaptureProperty( g_capture, CV_CAP_PROP_FRAME_WIDTH