#include ＜iostream＞                      (注意: < 是中文小于号, 需要改过了才能使用)

                #include ＜opencv2/core/core.hpp>          (注意: < 是中文小于号, 需要改过了才能使用)

                #include ＜opencv2/highgui/highgui.hpp>    (注意: < 是中文小于号, 需要改过了才能使用)

                #include ＜opencv2/opencv.hpp>             (注意: < 是中文小于号, 需要改过了才能使用)

                using namespace std;

                using namespace cv;

                IplImage* doCanny(IplImage* image_input,

                double lowThresh,

                double highThresh,

                double aperture)

                {

                if(image_input->nChannels != 1)

                return (0);

                IplImage* image_output = cvCreateImage(cvGetSize(image_input),

                image_input->depth,

                image_input->nChannels);

                cvCanny(image_input,image_output,lowThresh,highThresh,aperture);

                return(image_output);

                }

                int main(int argc, char* argv[])

                {

                cvNamedWindow("Camera" , CV_WINDOW_AUTOSIZE );

                CvCapture* capture = cvCreateCameraCapture(CV_CAP_ANY);

                assert(capture != NULL);

                IplImage *frame = 0;

                frame = cvQueryFrame(capture);

                IplImage *frame_edge = cvCreateImage(cvGetSize(frame),

                IPL_DEPTH_8U,

                1);

                while(1)

                {

                frame = cvQueryFrame(capture);

                if(!frame) break;

                cvConvertImage(frame,frame_edge,0);

                frame = cvCloneImage(frame_edge);

                frame_edge = doCanny(frame_edge,70,90,3);

                cvShowImage("Camera",frame_edge);

                char c = cvWaitKey(15);

                if(c == 27)  break;

                }

                cvReleaseCapture(&capture);

                cvReleaseImage( &frame_edge );

                cvReleaseImage( &frame);

                return (int)0;

                }