[Gimp-user] Gimp 2.8 pixelation on resize

2015-04-27 Thread wk_
ofnuts wrote: I do agree that this specific implementation/version of the algorithm on this specific part of this specific photo looks better. Period(*) Ok, but my problem is that I have mostly blackheaded sheeps in my cattle. And renat's case show's that this is not only a matter of scanning

[Gimp-user] Gimp 2.8 pixelation on resize

2015-04-27 Thread renat
ofnuts wrote: And renat's case show's that this is not only a matter of scanning printed docs. Moreover, I faced the similar grid while downscaling many other landscape pics with huge flat - but not absolutely flat - surfaces, be it sky hit by noise a bit, or a sea-view with a small waves. So this

Re: [Gimp-user] Gimp 2.8 pixelation on resize

2015-04-26 Thread Liam R. E. Quin
On Wed, 2015-04-22 at 21:11 +0200, wk_ wrote: Liam wrote: If it is a scan of a printed document is is to be expected that there may be moiré patterns, even if the scanner is set to apply a descreen filter. I feel that there is something lost from my original post. Like it never

[Gimp-user] Gimp 2.8 pixelation on resize

2015-04-24 Thread wk_
So, if you scale down to 51% (which is about 2x) you first do a 2px Gaussian blur. Result here: http://imgur.com/iZB3lmw Do you agree that Gimp 2.6 version looks still out much better? http://pasteboard.co/27ib9Dvx.png Wbr, Gunnar -- wk_ (via www.gimpusers.com/forums)

Re: [Gimp-user] Gimp 2.8 pixelation on resize

2015-04-23 Thread Ofnuts
See https://en.wikipedia.org/wiki/Aliasing So, if you scale down to 51% (which is about 2x) you first do a 2px Gaussian blur. Result here: http://imgur.com/iZB3lmw On 20/04/15 09:25, wk_ wrote: Steve wrote: I got the original image you posted, and enhanced the contrast with duplicate

Re: [Gimp-user] Gimp 2.8 pixelation on resize

2015-04-22 Thread Liam R. E. Quin
On Sun, 2015-04-19 at 22:20 +0200, wk_ wrote: Steve wrote: I have never seen anything exactly like this, so I am confident that it is not an artifact introduced by scaling an image in the GIMP. I don't understand your way to this conclusion. In my original post I have source scan,

[Gimp-user] Gimp 2.8 pixelation on resize

2015-03-27 Thread wk_
Hi! After installing new Gimp 2.8 (on Lubuntu 14.04 64bit) for our employee, she noticed, that scanned images are going pixelated (like moire effect) much more than with previous Gimp when scaling images down. I made a little set to comparision. This is clip of original scanned (300dpi) image: