Function image::imageops::colorops::index_colors

pub fn index_colors<Pix, Map>(image: &ImageBuffer<Pix, Vec<u8>>,
                              color_map: &Map)
                              -> ImageBuffer<Luma<u8>, Vec<u8>> where Map: ColorMap<Color=Pix>, Pix: Pixel<Subpixel=u8> + 'static

Reduces the colors using the supplied color_map and returns an image of the indices