POV-Ray : Newsgroups : povray.advanced-users : With all the talk of color, HCY : Re: With all the talk of color, HCY Server Time: 23 Jul 2019 12:26:38 GMT
  Re: With all the talk of color, HCY  
From: Mike Horvath
Date: 29 Nov 2016 07:47:14
On 11/29/2016 12:16 AM, [GDS|Entropy] wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>> I have never heard of HCY. Is there any documentation about it?
>>
>> Mike
>>
>
> I don't know if you saw my other post, but I included the links referenced
> by the source of that method.
>
> This page goes over many different models, and there is some chart they
> made with markers as well that is of unknown veracity.
> www.wolthera.info/?p=726
>
> Do let me know what conclusion you come to, because I am not well versed in
> color models, and find HCY to be very intuitive, easy to use and that it
> gets the exact results I am looking for.
>
> These next few links show the output of a Sirohi RD system using HCY, which
> is very different than he precise same inputs to HSB;
>
> Movie, Flickr did some unfortunate compression on (the stills are of better
> quality):
> https://m.flickr.com/#/photos/gds-entropy/31157486571/
>
> Frame 2000:
> https://m.flickr.com/#/photos/gds-entropy/30438914664/
>
> Frame 400:
> https://m.flickr.com/#/photos/gds-entropy/30438884034/
>
> How far from HCL is this? It behaves quite differently from other models
> from what I can tell.
>
> Ian
>

A couple of comments:

1. If she doesn't provide conversion formulas, I can't do much with it.
2. If it's an entirely new thing without being published in a scientific 
or technical journal, then Wikipedians will probably notice and delete it.

Mike


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