transform Mat into Channel32f

gistfile1.txt

//cv::imshow("", img.pixels);
    Channel32f chan(img.width, img.height);
    for(int i = 0; i < img.pixels.rows; i++)
    {
        for (int j = 0; j<img.pixels.cols; j++)
        {
            chan.setValue(ci::Vec2i(i, j), img.pixelAt(i, j));
        }
    }
    
    Texture myImg;
    myImg = Texture(chan);
    draw(myImg);

gistfile2.txt

a