c++ - FreeImage: Get pixel color

Question

I'm writing a little application that reads color of each pixel in image and writes it to file. First I did it in Python, buit it's too slow on big images. Then I discovered FreeImage library, which I could use, but I can't understand how to use GetPixelColor method. Could you please provide an example on how to get color, for example, of pixel[50:50]? Here is information about GetPixelColor: http://freeimage.sourceforge.net/fnet/html/13E6BB72.htm. Thank you very much!

Answer 1

With FreeImagePlus using a 24 or 32 bit image, getting the pixel at coords 50, 50 would look like this:

fipImage input;
RGBQUAD pixel;

input.load("myimage.png");
height = in.getHeight();

in.getPixelColor(50, height-1-50, &pixel);

Be aware that in FreeImage the origin is bottom left, so y values will probably need to be inverted by subtracting y from the image height as above.