View source for MaskTools/CombMask

{{FilterCat|External_filters|Other_filters|Support_filters}}

{{FuncDef|CombMask (clip[, int "thY1"[, int "thY2"]])}}

'''Plugin''': [[MaskTools]]

This filter produces a mask showing areas that are combed. The thresholds work as for the other filters: after calculating the combing value, if this one is under <tt>thY1</tt>, the pixel is set to 0, over <tt>thY2</tt>, it is set to 255, and in between, it is set to the combing value divided by 256. 

The combing value is (upper_pixel - pixel)*(lower_pixel - pixel). Thus, it is not normalized to the range 0..255, because if it was done, value would be close to 1 or 2, no more. That means you can use threshold higher than 255, even if they should not be useful. 

Defaults are <tt>thY1</tt> = 10 and <tt>thY2</tt> = 10 (thus making a binary mask). 
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