Camera2 byteArray to BGR uint8 mat conversion

Android/Java
4

so, problem is, you have an argb image on the java side and an expected bgr Mat on the c++ side.

maybe you can use mixChannels():


Mat argb2bgr(const Mat &m) {
	Mat _r(m.rows, m.cols, CV_8UC3);
	mixChannels({m}, {_r}, {1,2, 2,1, 3,0}); // drop a, swap r,b
    return _r;
}

you also dont need to split anything into channels:


Mat dehaze(const Mat &argb, Scalar tw=Scalar(0.8, 0.8, 0.5)) {
    // convert to rgb, [0...1]
	Mat image = argb2bgr(argb);
	image.convertTo(image, CV_64F, 1.0/255);

	GaussianBlur(image, blurred, Size(41, 41), 30, 30);
    
    // each channel on its own row
    Mat channels = blurred.reshape(1,blurred.total()); 

    // check for max along x axis
    Mat maxVals;
    reduce(channels, maxVals, 0, REDUCE_MAX, image.depth());

    Mat tbgr = (Scalar::all(1.0) - blurred.mul(tw)) / maxVals;
}

btw, do you have a link to the algorithm you try to implement here ?