OpenCV create Mat from byte array

Question

In my C++ dll I am creating Mat from byte array:

BYTE * ptrImageData;  //Image data is in this array passed to this function

Mat newImg = Mat(nImageHeight,          


        

Answer 1

Yes, this is one way to create a Mat from a byte array. You just have to be careful that your array contains what you think it does.

The image is created with some gray shade not the original one.

So you are getting an image in newImg? What was the pixel format of the original data?

Maybe you've switched the red and blue channels. The following line will swap the channels:

cv::cvtColor(newImg,swappedImg,CV_RGB2BGR);