OpenCV: How to convert CV_8UC1 mat to CV_8UC3

Question

How to convert CV_8UC1 Mat to CV_8UC3 with OpenCV?

Mat dst;
Mat src(height, width, CV_8UC1, (unsigned char*) captureClient->data());
src.convertTo(dst, CV         


        

Answer 1

From the documentation on convertTo

void Mat::convertTo(Mat& m, int rtype, double alpha=1, double beta=0) const

rtype – The desired destination matrix type, or rather, the depth (since the number of channels will be the same with the source one). If rtype is negative, the destination matrix will have the same type as the source.

You want to create a matrix for each of the 3 channels you want to create and then use the merge function. See the answers to this question