PixelPaint: Filters read off the edge of the image

[AtkinsSJ]

If you create a new image, and then run a gaussian blur on it, the edges of the image become darker. It seems like it's reading black pixel values from off the edge of the image. I don't know how the convolution matrix should work with image edges, but it should only take the image itself into account.

[alimpfard]

There's an option for that (which is probably not exposed in the GUI), it can either read zeros or wrap around the image. There's no real universal solution to this that I know of, but I'm far from an expert in that field :P

[sppmacd]

GIMP makes this configurable through "Abyss policy", you can select "None", "Clamp", "Black" or "White":

[AtkinsSJ]

I'd personally say the most sensible (or, least surprising) default would be 'clamp' there: Assume that whatever the edge pixel's color is, it continues infinitely in that direction. Seems like mostly an issue of what the default is more than anything.

[viyangjain]

Hello I'm new to open source can you guide me how can I contribute in this issue.