Function as_blue_channel

pub fn as_blue_channel<I, C>(image: &I) -> Image<Rgb<C>>
where
    I: GenericImage<Pixel = Luma<C>>,
    Rgb<C>: Pixel<Subpixel = C>,
    C: Primitive,

Creates an RGB image by embedding a grayscale image in its blue channel.

Examples

use image::Luma;
use imageproc::map::as_blue_channel;

let image = gray_image!(
    1, 2;
    3, 4);

let expected = rgb_image!(
    [0, 0, 1], [0, 0, 2];
    [0, 0, 3], [0, 0, 4]);

let actual = as_blue_channel(&image);
assert_pixels_eq!(actual, expected);