POV-Ray : Newsgroups : povray.binaries.images : Help with JPEG conversion : Re: Help with JPEG conversion Server Time
18 Aug 2024 16:15:39 EDT (-0400)
  Re: Help with JPEG conversion  
From: David Fontaine
Date: 25 Aug 2000 23:03:07
Message: <39A73147.CA5B9F2F@faricy.net>
Fabien Mosen wrote:

> In general, you might want to avoid such pure tones, as it JPG badly,
> and, anyway, it's harsh, even without the compression problems.
>
> That said, there is a solution to your problem : you must ensure that
> your conversion program does 1x1x1 subsampling in JPG conversion.
> PSP is unable to do that.  If you're not afraid of using a DOS-based
> program, I recommend "SEA" which you can get from www.photodex.com
> (shareware with GUI, stopped developpement :-(( ).
>
> I join a sample of what it can do for your problem.

What is n:n:n subsampling exactly? (I checked my program and it has YUV 4:1:1,
4:2:2 or 4:4:4)

--
David Fontaine   <dav### [at] faricynet>   ICQ 55354965
Please visit my website:  http://davidf.faricy.net/


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