chromanr

Reduce chrominance noise.

The filter accepts the following options:

thres

Set threshold for averaging chrominance values. Sum of absolute difference of Y, U and V pixel components of current pixel and neighbour pixels lower than this threshold will be used in averaging. Luma component is left unchanged and is copied to output. Default value is 30. Allowed range is from 1 to 200.

sizew

Set horizontal radius of rectangle used for averaging. Allowed range is from 1 to 100. Default value is 5.

sizeh

Set vertical radius of rectangle used for averaging. Allowed range is from 1 to 100. Default value is 5.

stepw

Set horizontal step when averaging. Default value is 1. Allowed range is from 1 to 50. Mostly useful to speed-up filtering.

steph

Set vertical step when averaging. Default value is 1. Allowed range is from 1 to 50. Mostly useful to speed-up filtering.

threy

Set Y threshold for averaging chrominance values. Set finer control for max allowed difference between Y components of current pixel and neigbour pixels. Default value is 200. Allowed range is from 1 to 200.

threu

Set U threshold for averaging chrominance values. Set finer control for max allowed difference between U components of current pixel and neigbour pixels. Default value is 200. Allowed range is from 1 to 200.

threv

Set V threshold for averaging chrominance values. Set finer control for max allowed difference between V components of current pixel and neigbour pixels. Default value is 200. Allowed range is from 1 to 200.

distance

Set distance type used in calculations.

‘manhattan’

Absolute difference.

‘euclidean’

Difference squared.

Default distance type is manhattan.