学习openCV第四章答案

#include "cv.h"
#include "highgui.h"

#pragma comment(lib,"cv.lib")
#pragma comment(lib,"cxcore.lib")
#pragma comment(lib,"highgui.lib")

int main(int argc, char** argv)
{
	CvCapture* capture = cvCreateFileCapture("11.avi");
    cvNamedWindow("origin",CV_WINDOW_AUTOSIZE);
    cvNamedWindow("gray",CV_WINDOW_AUTOSIZE);
    cvNamedWindow("canny",CV_WINDOW_AUTOSIZE);
	cvNamedWindow("totle", CV_WINDOW_AUTOSIZE);

	CvSize size = cvSize((int)cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH),
			                 (int)cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT));

    IplImage* gray = cvCreateImage(size,IPL_DEPTH_8U,1);
	 IplImage* gray3 = cvCreateImage(size,IPL_DEPTH_8U,3);//三通道灰度图像
    IplImage* cannyImage = cvCreateImage(size,IPL_DEPTH_8U,1);
	IplImage* cannyImage3 = cvCreateImage(size,IPL_DEPTH_8U,3);//三通道canny图像
	//size.width = size.width*3;
	IplImage* totle = cvCreateImage(cvSize(size.width*3,size.height),IPL_DEPTH_8U, 3);
    cvZero(totle);

	while (1)
	{
		IplImage* frame = cvQueryFrame(capture);
		
		if (!frame)
		{
			return -1;
		}
		
		cvShowImage("origin",frame);
	
        cvConvertImage(frame,gray,1);
		
		cvShowImage("gray",gray);

		//做canny运算
		
		if (gray->nChannels != 1)
		{
			break;
		}
		cvCanny(gray,cannyImage,100,150,3);
	
		cvShowImage("canny",cannyImage);

		IplImage* img1 = cvCreateImageHeader(size,frame->depth,3);
		IplImage* img2 = cvCreateImageHeader(size,frame->depth,3);
		IplImage* img3 = cvCreateImageHeader(size,frame->depth,3);
		img1->origin = frame->origin;
		img1->widthStep = totle->widthStep;//这里注意，因为img1要成为在大图中的一部分，所以是大图每行字节长

		img2->origin = frame->origin;
		img2->widthStep = totle->widthStep;

		img3->origin = frame->origin;
		img3->widthStep = totle->widthStep;

		cvCvtColor(gray,gray3,CV_GRAY2BGR);
        cvCvtColor(cannyImage,cannyImage3,CV_GRAY2BGR);

	

		img1->imageData = totle->imageData; //第一个指向大图的开始处，即第一行
		cvCopy(frame,img1);

		img2->imageData = totle->imageData + frame->widthStep;//这里很关键，注意字节排列问题，所以不能用width
        cvCopy(gray3,img2);

		img3->imageData = totle->imageData + 2*frame->widthStep;
        cvCopy(cannyImage3,img3);

		cvShowImage("totle",totle);
        CvFont font  = cvFont(10.0,1);
		cvInitFont(&font,CV_FONT_HERSHEY_SCRIPT_SIMPLEX,0.5f,0.5f,0,1);
		cvPutText(totle,"Frame",cvPoint(10,200),&font,cvScalar(0,0,255));
		cvPutText(totle,"Frame_gray",cvPoint(10+size.width,200),&font,cvScalar(0,0,255));
		cvPutText(totle,"Frame_canny",cvPoint(10+size.width*2,200),&font,cvScalar(0,0,255));
        char c = cvWaitKey(33);
		if (c == 27)
		{
			break;
		}

	}
	
	cvReleaseCapture(&capture);
    cvReleaseImage(&gray);
	//cvReleaseImage(&gray);
	cvReleaseImage(&cannyImage);
	cvReleaseImage(&totle);
	cvReleaseImage(&gray3);
	cvReleaseImage(&cannyImage3);
	cvDestroyAllWindows();
	
	return 1;

}