Module image::imageops::colorops[−][src]

Functions for altering and converting the color of pixelbufs

Structs

A bi-level color map

A color map

brighten	Brighten the supplied image. `value` is the amount to brighten each pixel by. Negative values decrease the brightness and positive values increase it.
contrast	Adjust the contrast of the supplied image. `contrast` is the amount to adjust the contrast by. Negative values decrease the contrast and positive values increase the contrast.
dither	Reduces the colors of the image using the supplied `color_map` while applying Floyd-Steinberg dithering to improve the visual conception
grayscale	Convert the supplied image to grayscale
huerotate	Hue rotate the supplied image. `value` is the degrees to rotate each pixel by. 0 and 360 do nothing, the rest rotates by the given degree value. just like the css webkit filter hue-rotate(180)
index_colors	Reduces the colors using the supplied `color_map` and returns an image of the indices
invert	Invert each pixel within the supplied image. This function operates in place.