opencv各通道像素坐标数据的存取

 1.CvMat数据的处理哦：

 #pragma comment( lib, "cxcore.lib" )
 #include "cv.h"
 #include
 void main()
 {
     //矩阵元素为三通道浮点数
     CvMat* mat = cvCreateMat(3,3,CV_32FC3);
     cvZero(mat);//将矩阵置0
     //为矩阵元素赋值

     //获得矩阵元素(0,0)的指针
     float *p = (float*)cvPtr2D(mat, 0, 0);
     //为矩阵赋值
     for(int i = 0; i < 9; i++)
     {
         //为每个通道赋值
         *p = (float)i*10;
         p++;
         *p = (float)i*10+1;
         p++;
         *p = (float)i*10+2;
         p++;
     }

     //打印矩阵的值
     p =  (float*)cvPtr2D(mat, 0, 0);

     for(i = 0; i < 9; i++)
     {
         printf("%2.1f,%2.1f,%2.1f/t",*p,*(p+1),*(p+2));
         p+=3;
         if((i+1) % 3 == 0)
             printf("/n");
     }
 }