02-03-2018, 09:19 AM
(This post was last modified: 02-03-2018, 09:26 AM by rich2005.
Edit Reason: typo
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(02-03-2018, 06:06 AM)grit Wrote: When I scale down and rotate layers in 2.9.8/9, resolution is decreased and layer is blurred. I remember this wasn't like that before.
Is that a bug?
Obviously depends on the image sizes and amount of scaling/rotating.
There is a difference between 2.8 and 2.9 - I think less of a bug, more a decision by the developers.
The Gimp 2.8 sinc(Lanczos3) algorithm replaced by 2 new methods.
LoHalo method: when you downscale an image thats less than a half of the original size
NoHalo method: when you do not reduce the size much (rotate, shear or something)
This does mean that for small images there is a less sharp 'feel' - edge artifacts are not there. You need to zoom in for this comparison, but differences are there.
You might need to sharpen, depending on requirements. Gimp 2.9 does now come with wavelet sharpen. Usual advice remains, leave any sharpening to the very final procedure.