[Octave-bug-tracker] [bug #51769] [octave forge] (image) imresize bilinear interpolation inaccurate

[Christof Kaufmann]

Follow-up Comment #19, bug #51769 (project octave):

When I fixed bilinear interpolation, I had noticed that the results were wrong
for bicubic interpolation, too. However, I was not sure, whether you would be
interested in a patch at all and therefore I had not fixed bicubic
interpolation.

There is also a comment in the code:
## work around for imremap, valid for linear interpolation, probably bad
## for cubic interpolation. Limits indices to the bounds 1 and end.

Should bicubic interpolation be fixed right here? The title only talks about
bilinear interpolation. Still, the methods are all based on sampling points at
the right positions... so would still be on topic. It could take a while for
me to fix it though.

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