Module image 

Plain in-memory images and PNG input / output.

Structs

GrayImage

One 8-bit channel (masks).

RgbaImage

RGBA, 8 bits per channel, straight (not premultiplied) alpha.

Functions

decode_png

Decode any 8-bit PNG (gray, gray+alpha, RGB, RGBA, palette) to RGBA.

luma

ITU-R BT.601 luma, as used for gray layers.