POV-Ray : Newsgroups : povray.advanced-users : HDR compositing? : Re: HDR compositing? Server Time
16 May 2024 05:38:27 EDT (-0400)
  Re: HDR compositing?  
From: Thomas de Groot
Date: 2 Jul 2014 03:08:37
Message: <53b3aff5$1@news.povray.org>
On 1-7-2014 22:37, Christian Froeschlin wrote:
> On 25.05.2014 14:00, Thomas de Groot wrote:
>
>> Does anyone know how to do HDR compositing in POV-Ray, or something
>> giving similar results? I do not mean a hdr output, but something more
>> sophisticated than simple averaging of images.
>
> A bit late reply but I think you can do the following:
>
> - Treat the different exposures as functions (split into R + G + B)
> - Combine these into new functions using "select": use value
>    from longer exposure by default, pull values from shorter exposure
>    where longer exposure is above some threshold (e.g. 0.9). When using
>    value of shorter exposure divide by appropriate factor (depending
>    on difference in stops)
> - Render combined function pigment with HDR output
>
>
Thanks Christian. In fact Clipka suggested what I should have known: 
render in exr and post-process in Ive's IC.

Thomas


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