Opencv learning notes -- Separation of color channels and multi-channel mixing

Catalog

Separate the color channels

Multichannel mixing

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Separate the color channels

Separate channel function ：split（）        take The multi-channel array is separated into several single channel arrays

void split(const Mat& src, Mat*mvbegin);

Parameters 1：onst Mat& Type of src, Separate multichannel arrays . 

Parameters 2： Output array or output vector Containers .

According to the effect ：

 

Code ：

Mat srcImg1;
vector<Mat> channel;

srcImg1 = imread("E:\\img\\logo6.png");
	
split(srcImg1, channel);

imshow(" Source graph srcImg1", srcImg1);
imshow(" Blue weight ", channel.at(0));
imshow(" Green component ", channel.at(1));
imshow(" Red component ", channel.at(2));

Color channel RGB, stay opencv In Chinese, it means BGR    B： blue    G： green     R： red

Multichannel mixing

Multi channel mixing is the merging of multiple channels .

merge() function       Combine multiple arrays into a multi-channel array .

void merge(InputArrayOfArrays  mv,  OutputArray  dst)

     

Parameters 1,mv. The merged input matrix or vector Array of containers , In this parameter All matrices must be the same                   Size and depth .

Parameters 2,dst. Output matrix , and mv[0] Have the same size and depth , And the number of channels is in the matrix array                   Total number of channels .