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From: RJH <patchmoney@gmx.com>
Newsgroups: rec.photo.digital
Subject: Re: Photo improvers
Date: Wed, 6 Nov 2024 08:59:08 -0000 (UTC)
Organization: A noiseless patient Spider
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On 4 Nov 2024 at 20:02:27 GMT, Gordon Freeman wrote:

> RJH <patchmoney@gmx.com> wrote:
> 
>> I've got a few ropey 100kb or so copies of photos I'd like to
> print at
>> A4 size. So something that could lessen the blockiness and make
> them
>> look more presentable would be useful.
>> 
>> Anyone any experience of the many 'AI' photo enhancement websites,
> or
>> desktop software, that does a decent job of such a task?
>> 
> 
> The deblocking filters available in some video editors can be very
> successfull but I don't know of an easy way to apply them to still
> images.
> 
> One thing worth trying is the Quantsmooth plugin in Irfanview. If
> you go to Properties > JPG/PCD/GIF > "JPEG Load" and tick "load
> using Quantsmooth" then open the image, it tries to reconstruct the
> lost precision of the quantisation values. The difference on a good
> quality JPEG is marginal and not worth the extra loading time, but
> on a very small or poor quality one it only takes seconds and cleans
> up the artefacts very well, and in fact the author of the plugin
> particularly recommends using when printing low quality images.
> 
> There's also a standalone Quantsmooth progran for Windows or Linux
> downloadable from https://github.com/kilobyte/jpegqs
> 
> 
> I'm sure an AI program would do better, in particular inventing
> plausible detail when enlarging a low res image, but I've no
> experience of using any of them, and whereas Quantsmooth only takes
> a few seconds to run, I understand AI programs typically take hours
> to do their magic.

Thanks, interesting. I tried the web page version:

https://ilyakurdyukov.github.io/jpeg-quantsmooth/

.. . . and didn't notice any difference. Think I need something more GUI based
.. . .

-- 
Cheers, Rob, Sheffield UK