Brightening Or Darkening Images In Pil Without Built In Functions

I'm using PIL for a uni project and we have one task where we have to darken or brighten an image without using any of PIL's functions to do so. The function takes the original fil

Solution 1:

It's an issue of integer division in the (extent/100) expression. To rectify this, you can:

use a floating point literal

extent/100.0

Handy if a term is a literal.

convert either the numerator or the denominator into float

float(extent)/a_hundred

If no term is a literal.

make sure that / is floating-point division

from __future__ import division

Insert that at the beginning of your source file, like all __future__ statements.

invoke python with -Qnew

python -Qnew

If using python2, otherwise

use python3 :)

In all cases, // remains integer division.