Some 3x3 filters for XnView

[Grincheux]

Size Divisor Bias V01 V02 V03 V04 V05 V06 V07 V08 V09
3 1 0 -2 4 -1 0 -4 0 0 4 0
3 1 0 -2 4 -1 0 -3 0 3 -3 3
3 1 0 -2 4 -1 0 1 2 -2 0 -1
3 1 0 -2 4 -1 0 1 4 -3 -4 2
3 1 0 -2 4 -1 0 4 -4 3 -3 0
3 1 0 -2 4 -1 0 4 4 -4 -3 -1

You can view the result here

[xnview]

thanks

[omniplex]

Size Divisor Bias V01 V02 V03 V04 V05 V06 V07 V08 V09

This is a stupid question, but what are these "user defined filters", what are the rules to create something that might be interesting or even useful? I tried to check the 1230 search hits for filter on site xnview.com (= forum+wiki+old site+everything), but found only one old thread mentioning the user defined filters at all.

[XnTriq]

This is a stupid question, but what are these "user defined filters", what are the rules to create something that might be interesting or even useful?

• XnView Forum
  • Filter - Custom
• Claude “Clo” Charries: XnView English Help Manual
  • Functions details » Customized effect-filters
• Wikipedia
  • Kernel (image processing)
• GIMP User Manual
  • Convolution Matrix