【OpenCV学习】多通道矩阵的赋值和取值

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/

 

#pragma comment( lib, "cxcore.lib" )
#include "cv.h"
#include <stdio.h>
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");
    }
}

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/