第四章练习题 4-1，4-2

4-1

#include "stdafx.h"#include "cv.h"#include "highgui.h"int _tmain(int argc, _TCHAR* argv[]){CvCapture * capture = cvCreateFileCapture("E://tp//leukocyte.avi");IplImage * pImage = NULL;IplImage * GaryImage = NULL;IplImage * CannyImage = NULL;IplImage * pCombineImg = NULL;//定义图像头IplImage* pSub1= NULL;IplImage* pSub2= NULL;IplImage* pSub3= NULL;int nWidth,nHeight ;CvFont myfont = cvFont(1, 2);//创建三个窗口用来显示图像/*cvNamedWindow("srcImage");cvNamedWindow("GaryImage");cvNamedWindow("CannyImage");*/cvNamedWindow("MaxImage");if(capture){nWidth = (int)cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH);nHeight = (int)cvGetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT);GaryImage = cvCreateImage(cvSize(nWidth,nHeight),8,1);CannyImage = cvCreateImage(cvSize(nWidth,nHeight),8,1);pCombineImg = cvCreateImage(cvSize(nWidth,nHeight*3),8,1);pSub1 = cvCreateImageHeader(cvSize(nWidth, nHeight), 8, 1);pSub2 = cvCreateImageHeader(cvSize(nWidth, nHeight), 8, 1);pSub3 = cvCreateImageHeader(cvSize(nWidth, nHeight), 8, 1);//图像原点位置： 0表示顶-左结构,1表示底-左结构pSub1->origin = pCombineImg->origin;pSub2->origin = pCombineImg->origin;pSub3->origin = pCombineImg->origin;//widthStep表示存储一行像素需要的字节数pSub1->widthStep = pCombineImg->widthStep;pSub2->widthStep = pCombineImg->widthStep;pSub3->widthStep = pCombineImg->widthStep;pSub1->imageData = pCombineImg->imageData;pSub2->imageData = pCombineImg->imageData + nHeight*pCombineImg->widthStep;pSub3->imageData = pCombineImg->imageData + nHeight*2*pCombineImg->widthStep;do {if (cvWaitKey(15) == 27){break;}pImage = cvQueryFrame(capture);if(pImage){//彩色图像转换成灰度图像cvConvertImage(pImage, GaryImage, 0);//边缘化处理cvCanny(GaryImage, CannyImage, 1, 2, 5);//分别在三个窗口显示/*cvShowImage("srcImage",pImage);cvShowImage("GaryImage",GaryImage);cvShowImage("CannyImage",CannyImage);*///组合到一个窗口显示cvShowImage("MaxImage",pCombineImg);cvSetImageCOI(pImage, 1);cvCopy(pImage, pSub1, NULL);cvCopy(GaryImage, pSub2, NULL);cvCopy(CannyImage, pSub3, NULL);//添加文本cvPutText(pSub1, "srcImage", cvPoint(nWidth/2, nHeight/2), &myfont, cvScalar(255,255,0));cvPutText(pSub2, "GaryImage", cvPoint(nWidth/2, nHeight/2), &myfont, cvScalar(255,255,0));cvPutText(pSub3, "CannyImage", cvPoint(nWidth/2, nHeight/2), &myfont, cvScalar(255,255,0));cvSetImageCOI(pImage, 0);}}while (true);cvReleaseImageHeader(&pSub1);cvReleaseImageHeader(&pSub2);cvReleaseImageHeader(&pSub3);cvReleaseImage(&GaryImage);cvReleaseImage(&CannyImage);cvReleaseImage(&pCombineImg);cvReleaseCapture(&capture);}cvDestroyAllWindows();return 0;}

 

 

4-2

#include "stdafx.h"#include"cv.h"#include "highgui.h"void myMouse_Callback(int event, int x, int y, int flag, void* pUser){char buffer[256];CvFont myFont = cvFont(1, 2);IplImage* pImage = (IplImage*)pUser;char* ptr = NULL;unsigned char r=0, g=0, b=0;switch (event){case CV_EVENT_LBUTTONDOWN://获取鼠标所指处的像素值ptr = pImage->imageData + y*pImage->widthStep + x * pImage->depth* pImage->nChannels/8;r = ptr[0];g = ptr[1];b = ptr[2];//显示鼠标的位置wsprintfA(buffer,"weizhi[%d,%d]",x,y);//显示鼠标所指处的像素值//wsprintfA(buffer, "rgb [%d,%d,%d]", r,g,b);cvPutText(pImage, buffer, cvPoint(x, y), &myFont, cvScalar(255,0,0));break;}}int _tmain(int argc, _TCHAR* argv[]){IplImage * img = NULL;img = cvLoadImage("E://tp//lena256.jpg");cvNamedWindow("E4-2");cvSetMouseCallback("E4-2",myMouse_Callback,(void*)img);do{cvShowImage("E4-2", img);if (cvWaitKey(1000)==27){break;}}while (true);cvReleaseImage(&img);cvDestroyWindow("E4-2");return 0;}