在opencv中访问多通道阵列中的整个通道

Question

我正在尝试在opencv中访问3通道图像中的整个通道（用整个矩阵替换通道，见下文）。是否可以在不循环单个像素值的情况下这样做？

Mat RGB(320, 480, CV_8UC3)
Mat R(320, 480, CV_8UC1)
Mat G(320, 480, CV_8UC1)
Mat B(320, 480, CV_8UC1)

// First channel of RGB = R
// second channel of RGB = G
// third channel fo RGB = B

Answer 1

只需使用split和merge

即可

Mat RGB // source mat
Mat BGR_3[3]; 
split(RGB,RGB_3);  
BGR_3[0]//do some operation Blue channel
BGR_3[1]//do some operation Green Channel
BGR_3[2]//do some operation Red channel

//later merge
Mat dst
merge(BGR_3,3,dst);