Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > alt.os.linux > #39093

Re: gamma

Show all headers | View raw

On 2016-09-24, tmelmosfire@gmail.com <tmelmosfire@gmail.com> wrote:
> On Friday, 23 September 2016 17:27:31 UTC, Snit  wrote:
>> On 9/23/16, 4:19 AM, in article ns33rb$q78$1@ls237.t-com.hr, "Askfor"
>> <askfor@nowhere.net> wrote:
>> 
>> > This might not be completely on-topic, but I think I could get an answer
>> > here, one that might be better than elsewhere.
>> > 
>> > 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 ?
>> 
>> If I understand correctly (and I might not!) brightness is, at least in
>> theory, linear... all levels of brightness on the screen are effected the
>> same: in other words both dark and light parts of the screen are brightened
>> (or made less bright).
>> 
>> Contrast works by making a bigger difference between dark and light areas...
>> but in a linear way (I think). It tends to make the near-whites and
>> near-blacks get pushed to the extremes and you lose details.
>> 
>> Gamma impacts both: the bright parts of the screen more than the dark... so
>> the curves you are seeing is showing how much more. Usually they show
>> brightening the black parts little if any and the white ones a lot with
>> those of different luminance values in some exponential way. This impacts
>> the contrast without "blowing out" the near-whites and near-blacks.
>
> Thank you. Good explanation and something I have wondered about.

Another snit sock puppet.
Are you guys getting this yet? 
I hope so.

Back to alt.os.linux | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

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

csiph-web