Colour representation in Pillow

Martin McBride, 2020-09-19
Tags colour, rgb, transparency, greyscale
Categories pillow
In section Python libraries

Colour is a vital aspect of computer imaging, of course. Pillow supports various different raster image formats, which in turn support different ways of representing colour:

  • Light and colour - a basic overview of how the human eye detects colour.
  • Colour spaces - colour is most commonly represented as RGB values, but some Pillow also supports several alternatives.
  • Colour depth - modern bitmap image formats typically use 8 bits per colour per pixel to represent colours, but Pillow also supports several alternatives, mainly used by older image formats.

Pillow refers to the combination of a colour space and a colour depth as the mode of the image. Pillow supports a fixed set of modes.

If you found this article useful, you might be interested in the book Computer Graphics in Python, or other books, by the same author.


Tag cloud

2d arrays abstract data type alignment and array arrays bezier curve built-in function close closure colour comparison operator comprehension context conversion data types design pattern device space dictionary duck typing efficiency encryption enumerate filter font font style for loop function function composition function plot functools generator gif gradient greyscale higher order function html image processing imagesurface immutable object index inner function input installing iter iterator itertools lambda function len linspace list list comprehension logical operator lru_cache mandelbrot map monad mutability named parameter numeric python numpy object open operator optional parameter or partial application path positional parameter print pure function radial gradient range recipes recursion reduce rgb rotation scaling sequence slice slicing sound spirograph str stream string subpath symmetric encryption template text text metrics transform translation transparency tuple unpacking user space vectorisation webserver website while loop zip

Copyright (c) Axlesoft Ltd 2020