#include"cv.h"

#include"highgui.h"

//读入视频并转换为灰度图再作边缘检测

//并分开三个窗口输出

IplImage *frame,*gray,*canny,*uni,*temp;

int wid=-1, hei=-1;

int main(void)

{

	CvCapture *src = cvCreateFileCapture("Megamind.avi");

	//cvNamedWindow("Union");

	cvNamedWindow("Origin");

	cvNamedWindow("Gray");

	cvNamedWindow("Canny");

	CvFont r, g, c;

	cvInitFont(&r, CV_FONT_HERSHEY_TRIPLEX, 1, 1, 0);

	cvInitFont(&g, CV_FONT_HERSHEY_TRIPLEX, 1, 1, 0);

	cvInitFont(&c, CV_FONT_HERSHEY_TRIPLEX, 1, 1, 0);

	while (1)

	{

		frame = cvQueryFrame(src);

		if (!frame)

			break;

		/*if (wid == -1)

		{

			wid = frame->width;

			hei = frame->height;

		}*/

		if (cvWaitKey(33) == 27)

			break;

		temp = cvCreateImage(cvGetSize(frame), IPL_DEPTH_8U, 3);

		cvCopy(frame, temp);

		cvPutText(temp, "Original", CvPoint(10, 30), &r, CV_RGB(0, 204, 153));//显示文字

		cvShowImage("Origin", temp);	

		gray = cvCreateImage(cvGetSize(frame), IPL_DEPTH_8U, 1);//先创建图像指针

		cvConvertImage(frame, gray);

		canny = cvCreateImage(cvGetSize(gray), IPL_DEPTH_8U, 1);//同上先创建

		cvPutText(gray, "Gray", CvPoint(10, 30), &g, CV_RGB(0, 204, 153));//显示文字

		cvShowImage("Gray", gray);//显示到灰度窗口中

		cvCanny(gray, canny, 20, 250, 3);//边缘检测处理

		cvPutText(canny, "Canny", CvPoint(10, 30), &c, CV_RGB(0, 204, 153));

		cvShowImage("Canny", canny);//显示到边缘检测窗口中

		/*uni = cvCreateImage(CvSize(3 * frame->width, frame->width), IPL_DEPTH_8U,3);

		CvRect pos1 = CvRect(0, 0, wid, hei);

		CvRect pos2 = CvRect(wid, 0, wid, hei);

		CvRect pos3 = CvRect(2*wid, 0 ,wid, hei);

		cvSetImageROI(uni, pos1);

		cvCopy(frame, uni);

		cvResetImageROI(uni);

		cvSetImageROI(uni, pos2);

		uni->nChannels = 1;

		cvCopy(gray, uni);

		cvResetImageROI(uni);

		cvSetImageROI(uni, pos3);

		uni->nChannels = 1;

		cvCopy(canny, uni);

		cvResetImageROI(uni);

		cvShowImage("Union", uni);*/

	}

	cvDestroyAllWindows();

	cvReleaseCapture(&src);

	cvReleaseImage(&gray);

	cvReleaseImage(&canny);

	return 0;

}