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

[Ofnuts <ofnuts gmx com>]

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 layers set to Overlay mode, plus some color curve tweaking:
> This is not my original post you are talking about, it is already renat's
> posting to this topic. So for interest of clarity i post my OP again, because
> there are described simple steps I did:
>
>
> 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: http://pbrd.co/1CTKhHB
>
> This is how it looks after scaling down (Sinc algorythm) to the 51 percent
> http://pbrd.co/1CTKHO7
>
> Same procedure with Gimp 2.6: http://pbrd.co/1CTL9vR
>
> And scaled down with ImageMagick: (convert -geometry 292x360 100precent.png
> 51percent_imagemagick.png) http://pbrd.co/1CTLgYg
>
> I like most the Gimp 2.6 version, it has no pixelation, but black characters
> have still sharp edges. ImageMagick is also not bad. But Gimp 2.8 version is not
> for my . What is wrong here? Is there something to make it better?
>
> TIA,
>
> Gunnar