Re: darkening colour

From	Bartc <bc@freeuk.com>
Newsgroups	comp.programming
Subject	Re: darkening colour
Date	2015-04-06 21:05 +0100
Organization	A noiseless patient Spider
Message-ID	<mfuosh$2oe$1@dont-email.me> (permalink)
References	(4 earlier) <c9464ca8-40fe-41b5-812b-03099f1e3915@googlegroups.com> <mfu298$71p$1@dont-email.me> <074c34c3-d929-497c-a7b1-cab576354c2f@googlegroups.com> <mfu747$pn9$1@dont-email.me> <df02d7fe-4e9a-408d-acb7-fb14ba8a0b21@googlegroups.com>

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On 06/04/2015 17:44, fir wrote:
> W dniu poniedziałek, 6 kwietnia 2015 17:02:28 UTC+2 użytkownik Bart napisał:

>> I don't know what I'm supposed to be looking at here. What is the
>> problem you're trying to solve? Are any of these before and after?
>>
>> But the rendering is crude enough that I doubt many will notice if the
>> colour balance is a bit off.
>>
>> Some of the objects do have garish (ie. highly saturated) colours, but
>> that would just be a bad choice of base colour: you can 'desaturate' by
>> choosing a different colour. You do't need to deal with it by complex
>> real-time per-pixel transformations.
>>
>
> So you tested it? (I thought nobody was testing it as they afraid of malware)
> Desaturation routine is seen when toggle 'q'

Sure.

> The problem? I want to general improve visual quality - thus i feel a need to test variious options etc
> Esp darkening/brightening i could use when doing shading of triangles to see if effect is
> not a bit better/more clear

OK, pressing Q in program22 and 23 (I can't remember 24), gives a 
gradual fade to black&white over the image.

If that's all you want, then I'm fairly certain that the simple 
luminance formula (the one that could be reduced to lookups) will work 
just as well.

But if you're concerned about the appearance, I'm not sure that's the 
right approach. If you don't want strong colours, then just start with 
less saturated colours in the first place! It doesn't look like you're 
attempting photo-realism so a 1% difference in correct colour balance is 
not going to be important.

There are also a lot of artefacts in the shading (especially on the 
solar panels of the space vehicle, if that's what they are) that could 
do with looking at.

-- 
Bartc

Thread

darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 01:12 -0700
  Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-06 10:52 +0200
    Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 11:21 +0100
      Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-06 12:44 +0200
        Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 12:54 +0100
          Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-06 14:27 +0200
          Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 05:51 -0700
    Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 04:38 -0700
      Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-06 14:52 +0200
        Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 06:25 -0700
          Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-06 17:02 +0200
            Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 09:36 -0700
              Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-07 10:52 +0200
                Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-07 02:10 -0700
                Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-07 11:30 +0200
                Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-07 03:24 -0700
                Re: darkening colour "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-04-07 13:00 +0200
      Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 14:17 +0100
        Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 06:27 -0700
          Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 14:39 +0100
            Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 06:48 -0700
              Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 16:02 +0100
                Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-06 09:44 -0700
                Re: darkening colour Bartc <bc@freeuk.com> - 2015-04-06 21:05 +0100
                Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-07 00:51 -0700
                Re: darkening colour fir <profesor.fir@gmail.com> - 2015-04-07 01:12 -0700

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