POV-Ray : Newsgroups : povray.binaries.images : Fixed shadows FINAL : Re: Fixed shadows FINAL Server Time
15 Aug 2024 14:21:44 EDT (-0400)
  Re: Fixed shadows FINAL  
From: Glen Berry
Date: 8 Jun 2002 16:46:47
Message: <G2wCPcnpVSrbQgG9eSHoKDRCSPQR@4ax.com>
On Sat, 08 Jun 2002 23:14:36 +0300, Kari Kivisalo
<pro### [at] luxlabcom> wrote:

>I found that adding Gaussian noise individually to each channel
>and twice as much to blue channel duplicated quite accurately
>noise in a couple of 6000dpi slide scans. Blue channel is more noisy
>in all imaging systems. I scale up the image, add noise, blur a little
>to prevent noise aliasing, scale down and mix with original.

That sounds interesting, at least for simulating electronic scans and
digital camera images. Have you ever given any thought to simulating
film grain?



Later,
Glen

7no### [at] ezwvcom     (Remove the numeral "7")


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