Boost or alter saturation.

The filter accepts the following options:

intensity

Set strength of boost if positive value or strength of alter if negative value. Default is 0. Allowed range is from -2 to 2.

rbal

Set the red balance. Default is 1. Allowed range is from -10 to 10.

gbal

Set the green balance. Default is 1. Allowed range is from -10 to 10.

bbal

Set the blue balance. Default is 1. Allowed range is from -10 to 10.

rlum

Set the red luma coefficient.

glum

Set the green luma coefficient.

blum

Set the blue luma coefficient.

alternate

If intensity is negative and this is set to 1, colors will change, otherwise colors will be less saturated, more towards gray.