[argyllcms] Re: Quality of camera profile - colour banding
- From: Milan Knížek <knizek.confy@xxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 28 Jul 2008 21:26:09 +0200
Graeme Gill píše v Po 28. 07. 2008 v 18:13 +1000:
> Thanks. Without starting to look at the color conversions,
> I don't like the look of the original - it seems to have a great
> deal of quantization and reversals, not something you'd normally
> see in a natural image. I've isolated a section of the
> blue channel, and picked out a range of values and magnified
> them to make it obvious, and put it here:
> <http://www.argyllcms.com/bandin_B.tif>.
Interesting.
I prepared a GIF animation of the R+G+B channels of the image available
in the test_pack.zip and another image converted with eos10d profile (by
Ture Palsson) and updated the page:
http://www.milan-knizek.net/files/tmp/banding.html
While the posterisation in the shadows is on both images, the uneven
posterisation in highlights (especially green and blue channels) is well
visible only with my custom made profile (on the left).
Milan Knizek
knizek (dot) confy (at) volny (dot) cz
http://www.milan-knizek.net - about linux and photography
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