Thanks for the hint Matthieu ... will start with the crop sizing
David
On 11/25/2016 01:28 AM, Matthieu Moy wrote:
----- Original Message -----
I sometimes find that after processing my images get pixelised on the
lighttable. If I zoom in or out the problem remains but it is not creating
problems on the final output. .... anybody else see this?
If you look closely, you'll see that it's not pixelization : you do see large
squares, but there are details inside these squares (as opposed to a large
pixel which obviously doesn't).
This looks very much like an interference pattern due to resizing (e.g. subsampling with
an "almost integer" factor which results in sampling always the R pixels of
your sensor for a while, then only the B pixels, ...). It's probably not a coincidence
that the pattern you see on the image is the same as the color pattern on your camera's
color filter array.
Unfortunately, I don't know the algorithms enough to give a real diagnosis, and even less
a solution :-(. If you're looking for a combination of modules, I'd look at the crop
module (the crop factor may be the one giving you the "almost integer" factor),
and the demosaic module.
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