图像水平方向的投影

#include <highgui.h>#include <cv.h>int main(){IplImage *src=cvLoadImage("D:/a_project/image/1.jpg",0);cvThreshold(src,src,50,255,CV_THRESH_BINARY_INV); IplImage *painty=cvCreateImage(cvGetSize(src),IPL_DEPTH_8U,1);    cvZero(painty);    int *colheight =new int[src->width];        memset(colheight,0,src->width*4);     CvScalar value;for(int i=0;i<src->width;i++)for(int j=0;j<src->height;j++){   value=cvGet2D(src,j,i);   if(value.val[0]==0)   {      colheight[i]++; //统计每列的白色像素点   }   }for(int i=0;i<src->width;i++)for(int j=0;j<colheight[i];j++){  value.val[0]=255;  cvSet2D(painty,j,i,value); // 将 src[j][i]设置成黑色}      cvNamedWindow("C",1);  cvNamedWindow("l",1);  cvShowImage("C",src);  cvShowImage("l",painty);    cvWaitKey(0);}