#include "stdafx.h"
#include "cv.h"
#include "highgui.h"void* getImage()
{CvCapture* capture=cvCreateCameraCapture(0);IplImage *img1=NULL,*img2=NULL,*img3=NULL,*frame=NULL,*ppImage=NULL;char keycode;cvNamedWindow("frame");if(capture!=NULL){frame=cvQueryFrame(capture);  //注意任何视频(包括摄像头获取的视频的第一帧都是空帧,要从下一帧开始才是图像)while(1){frame=cvQueryFrame(capture);cvShowImage("frame",frame);keycode=cvWaitKey(30);if(keycode==27)break;//保存第一张想要保存的图像if(keycode=='1'){img1=cvCreateImage(cvGetSize(frame),frame->depth,1);    //将通道数为1对应灰度图像，再将frame利用cvConvertImage转换成灰度图像cvConvertImage(frame,img1);                              //也可以利用cvCvtColor(frmae,img1,CV_BGR2GRAY)转成灰度图像cvSaveImage("C:/Users/shark/Desktop/1.jpg",img1);   }//保存第二张想要的图像：相对于第一张图像多出一个水杯之类的东西if(keycode=='2'){img2=cvCreateImage(cvGetSize(frame),frame->depth,1);cvConvertImage(frame,img2);cvSaveImage("C:/Users/shark/Desktop/2.jpg",img2);}}}img3=cvCreateImage(cvGetSize(frame),frame->depth,1);ppImage=cvCreateImage(cvGetSize(frame),frame->depth,1);//差的绝对值、二值化阈值、开操作cvAbsDiff(img1,img2,img3);cvThreshold(img3,img1,20,255,CV_THRESH_BINARY);cvMorphologyEx(img1,img3,NULL,NULL,CV_MOP_OPEN);cvCopy(img3,ppImage);cvSaveImage("C:/Users/shark/Desktop/3.jpg",ppImage);cvReleaseImage(&img1);cvReleaseImage(&img2);cvReleaseImage(&img3);cvReleaseCapture(&capture);cvDestroyAllWindows();return ppImage;
}bool findImage(IplImage* pImage,char nVal, CvPoint* pPos)
{char* ptr=NULL;if(pImage->nChannels==1){ptr=pImage->imageData;if(ptr!=NULL){for(int row=0;row<pImage->height;row++){for(int col=0;col<pImage->width;col++){if(ptr[col]==nVal)    //此处图像颜色类型为uchar{pPos->x=col;pPos->y=row;return true;}if(ptr[col]>150)   //???{int x=0;}}ptr+=pImage->widthStep;}}}return false;
}int main()
{IplImage* pImg=NULL;CvPoint oldPoint={0,0},curPoint={0,0};int nArea=0,newArea=0;CvConnectedComp comp;char* szMyWin="my win";pImg=(IplImage*)getImage();if(pImg!=NULL){do{if(findImage(pImg,255,&curPoint))    //找像素值为255的像素点{cvFloodFill(pImg,curPoint,cvScalar(100),cvScalar(0),cvScalar(0),&comp,8|CV_FLOODFILL_FIXED_RANGE);if(comp.area<nArea){if(comp.area>0)cvFloodFill(pImg,curPoint,cvScalar(0),cvScalar(0),cvScalar(0),&comp,8|CV_FLOODFILL_FIXED_RANGE);    }else{newArea=comp.area;if(nArea>0)   //此为对之前区域填充cvFloodFill(pImg,oldPoint,cvScalar(0),cvScalar(0),cvScalar(0),&comp,8|CV_FLOODFILL_FIXED_RANGE);memcpy(&oldPoint,&curPoint,sizeof(CvPoint));//oldPoint=curPoint;nArea=newArea;}}else{cvFloodFill(pImg,oldPoint,cvScalar(255),cvScalar(0),cvScalar(0),&comp,8|CV_FLOODFILL_FIXED_RANGE);   //填充最后的最大区域break;}}while(true);cvSaveImage("C:/Users/shark/Desktop/4.jpg",pImg);cvNamedWindow(szMyWin);cvShowImage(szMyWin,pImg);cvWaitKey(0);cvReleaseImage(&pImg);cvDestroyWindow(szMyWin);}
}