I have geotiff tiles and some need te be partially blurred, because of military terrains.

I mainly use the rasterresampler to resample the pixels in those area's to 3 meters and then resample them back to their original pixel dimensions.

The problem as you can see in the picture is on the edge.

The black edge is 1,12 meters, so the resampler doesn't have the space to make another 3x3 cell there, so he doesn't.

How can I solve this?

I had the idea to make the geotiff tiles canvas bigger (see picture), let it resample and then clip it back with the bounding box of the original tile.

But I don't know how to make the canvas bigger.

@Takashi Iijima​ Do you have an idea?