contrast
========

Goal:
-----
Increases or decreases the contrast of the supplied image.

Syntax:
-------
`contrast <fp>`

where <fp> means: any 32 bit floating point number is required as parameter input.

A positive value for <int> means the contrast will be increased, and a negative value for <int> means the contrast will be decreased.

Usage example:
--------------
`sic input.png output.png --script "contrast 10;"`
or
`sic input.png output.png --script "contrast -10;"`

See also:
---------
https://docs.rs/image/0.19.0/image/imageops/colorops/fn.contrast.html
