Vapoursynth PlaneStats with threshold.
Min and Max with threshold are useful for white balance scripts like retinex.

PlaneMinMax

Usage

psm.PlaneMinMax(vnode clip [, float minthr=0, float maxthr=0, int plane=0])

Parameters:

• clip
  A clip to process.
  Gets frame props named psmMin and psmMax.
• minthr
  Amount of the smallest pixels dropped before pick the PlaneStatsMin.
  Should be a float between 0.0 and 1.0
• maxthr
  Amount of the largest pixels dropped before pick the PlaneStatsMax.
  Should be a float between 0.0 and 1.0
• plane
  Plane to be used.

PlaneAverage

Usage

psm.PlaneAverage(vnode clip, int[] value_exclude [, int plane=0, string prop='psmAvg'])

Parameters:

• clip
  A clip to process.
  Gets frame prop named psmAvg.
• value_exclude
  List of pixel values that will be ignored during averaging.
• plane
  Plane to be used.
• prop
  Name of the property to be used.