POV-Ray : Newsgroups : povray.newusers : Point Spread Function Server Time: 17 Dec 2018 01:17:05 GMT
  Point Spread Function (Message 1 to 2 of 2)  
From: combobreaker
Subject: Point Spread Function
Date: 18 Nov 2016 14:00:01
Message: <web.582f08b364bf7ed96b2436be0@news.povray.org>
Hi
I am trying to simulate some experiments using POV-Ray. PSF contains critical
information for my experiments. I couldn't find anything about PSF model. Can
someone tell me what the PSF model is? BTW, I am using perspective camera with
no focal blur.

Many thanks in advance.


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From: clipka
Subject: Re: Point Spread Function
Date: 18 Nov 2016 15:59:57
Message: <582f257d@news.povray.org>
Am 18.11.2016 um 14:57 schrieb combobreaker:
> Hi
> I am trying to simulate some experiments using POV-Ray. PSF contains critical
> information for my experiments. I couldn't find anything about PSF model. Can
> someone tell me what the PSF model is? BTW, I am using perspective camera with
> no focal blur.
> 
> Many thanks in advance.

In terms of camera optics, POV-Ray's camera model does not include the
simulation of a PSF. Effectively, the PSF is that of an ideal pinhole
camera with an aperture diameter far smaller than the pixel size but far
larger than the wavelength (which of course does not match typical
real-world visible light scenarios).

In terms of image "reconstruction", POV-Ray also does not use a formal
PSF-based approach. Effectively, it just treats each pixel as a separate
bucket, and tries to compute a numeric integral for each bucket based on
as few samples as possible. In that sense it probably behaves pretty
much like an ideal CCD with a negligible distance between pixels.

I hope this helps.


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