Function combine_rgb_channels

pub fn combine_rgb_channels(
    r: &ImageBuffer<Luma<u8>, Vec<u8>>,
    g: &ImageBuffer<Luma<u8>, Vec<u8>>,
    b: &ImageBuffer<Luma<u8>, Vec<u8>>,
) -> ImageBuffer<Rgb<u8>, Vec<u8>>

Combine RGB channels into a color image