Python Programming for Biology: Bioinformatics and Beyond

Adjustments and filters

The previous example which adjusts the brightness of a pixmap leads neatly into thinking

about more general ways that we can change the global properties of an image. Helpfully

many kinds of adjustment, for contrast, brightness, sharpness etc., can be made directly in

PIL. This is more convenient than doing things in numeric Python arrays. Nonetheless, we

will go on to show some of the equivalent operations with arrays, because this gives more

control and teaches something about how the adjustments work at a low level.