在OpenCV中将Mats保存为int数组 [英] Saving Mats into int arrays in opencv

问题描述

我把我的img分成3个单独的Mats，像这样：

I split my img into 3 separate Mats like this:

std::vector<Mat> planes(3);
cv::split(img, planes);
cv::Mat R = planes[2];
cv::Mat G = planes[1];
cv::Mat B = planes[0];

现在我想将这些R，G和Bs值存储在三个不同的数组中。这样的：
例如对于R。

Now I want to store these R, G and Bs values in three different arrays. Somthing like this: for example for R.

std::vector<Mat> planes(3);
cv::split(img, planes);
cv::Mat R = planes[2];
int r[20]; 

for (i=0 ; i<20 ; i++)

{

r[i]= R[i];

}

我知道这会给错误。

I know this will give error. So how do I correctly implement this feature ?

推荐答案

这里是如何做到这一点R ; G）

Here is how you can do this for R (with obvious extension to B & G)

std::vector<Mat> planes(3);
cv::split(img, planes);
cv::Mat R;

// change the type from uchar to int
planes[2].convertTo(R, CV_32SC1);

// get a pointer to the first row
int* r = R.ptr<int>(0);

// iterate of all data  (R has to be continuous
// with no row padding to do it like this)
for (i = 0 ; i < R.rows * R.cols; ++i)
{    // you have to write the following :-)
     your_code(r[i]);
}   

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