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Re: gamma

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jrg wrote:
> On 09/23/2016 10:15 AM, Mike Easter wrote:
>> Askfor wrote:
>>> What is gamma, related to imaging and monitors ? Most explanations
>>> include some graphs, but how does it affect my visual experience ? How
>>> is it related to common visual attributes, like brightness, contrast and
>>> saturation ? Is there some sort of method to translate gamma into some
>>> combination of those three ?
>>
>> Should we assume that you already know/understand what the wp article on
>> gamma correction says?  It is brief but gives a useful overview.  Pieces
>> of two sentences pasted behind the link:
>>
>> https://en.wikipedia.org/wiki/Gamma_correction  Gamma encoding of images
>> is used to optimize the usage of bits when encoding an image, or
>> bandwidth used to transport an image, by taking advantage of the
>> non-linear manner in which humans perceive light and color. ... If
>> images are not gamma-encoded, they allocate too many bits or too much
>> bandwidth to highlights that humans cannot differentiate, and too few
>> bits or too little bandwidth to shadow values that humans are sensitive
>> to and would require more bits/bandwidth to maintain the same visual
>> quality.
>>
>
> Oh, now I see... :-p
>

I have found several articles. Very simplified, gamma is like contrast, 
but isn't linear, double gamma doesn't mean double contrast.

Generally, one can adjust monitor with gamma+brightness or 
contrast+brightness combinations. That information is of practical value 
to me at the moment. The rest of it, not so much.

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gamma Askfor <askfor@nowhere.net> - 2016-09-23 13:19 +0200
  Re: gamma "Auric__" <not.my.real@email.address> - 2016-09-23 14:10 +0000
    Re: gamma Askfor <askfor@nowhere.net> - 2016-09-23 16:50 +0200
      Re: gamma Jasen Betts <jasen@xnet.co.nz> - 2016-09-23 20:23 +0000
  Re: gamma Askfor <askfor@nowhere.net> - 2016-09-23 18:00 +0200
    Re: gamma Jasen Betts <jasen@xnet.co.nz> - 2016-09-23 20:26 +0000
      Re: gamma jrg <connyank@cox.net> - 2016-09-23 14:48 -0700
  Re: gamma Mike Easter <MikeE@ster.invalid> - 2016-09-23 10:15 -0700
    Re: gamma jrg <connyank@cox.net> - 2016-09-23 10:32 -0700
      Re: gamma Askfor <askfor@nowhere.net> - 2016-09-23 19:55 +0200
        Re: gamma Snit <usenet@gallopinginsanity.com> - 2016-09-23 11:05 -0700
  Re: gamma Snit <usenet@gallopinginsanity.com> - 2016-09-23 10:27 -0700
    Re: gamma tmelmosfire@gmail.com - 2016-09-23 21:06 -0700
      Re: gamma Jim Polaski <jpolaski@linuxmail.org> - 2016-09-24 04:16 +0000
        Re: gamma tmelmosfire@gmail.com - 2016-09-24 00:58 -0700

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