… = ImageHistogram[…] (gb.image.effect)
Dim hImageHistogram 
As ImageHistogram
Dim anInteger 
As Integer
anInteger 
= hImageHistogram 
[ Channel As Integer, Value As Integer ]
 
Return an histogram value.
  - 
Channel is the color channel to look at.
 
  - 
Value is the color value.
 
  
Channel can be 
Image.Red, 
Image.Green, 
Image.Blue or 
Image.Alpha.