[GRASS-dev] how difficult would it be to modify i.edge to not load the entire image into memory ?

[Moritz Lennert]

Hi Anna, Hi Vaclav,

I would love to use the i.edge module. However, the fact that it reads 
everything into memory obviously limits its use either to small images, 
or to tiled versions of larger images.

I have just rapidly looked at the code, but I cannot really detect any 
place where you really need the entire image, or ? The Gaussian filter 
could be cut off at a certain distance and the actual Canny detector is 
also based on a kernel, AFAICT. So, do you think this could be rewritten 
to use the SEGMENT library and at all times only load necessary parts of 
the image into memory ?

Moritz