POV-Ray : Newsgroups : povray.advanced-users : Fourier transform of an image? Server Time: 22 Nov 2019 04:38:22 GMT
  Fourier transform of an image? (Message 1 to 3 of 3)  
From: gregjohn
Subject: Fourier transform of an image?
Date: 15 Oct 2019 13:55:00
Message: <web.5da5cf13d84b00751da97f40@news.povray.org>
Hi, I know that povray enables several kinds of image processing, if you load an
image as a pigment pattern.  I'm listening to some advanced lectures on
microscopy, and they are talking about doing a Fourier transform on an image.

Q: How easy is it to do this in povray?  TIA


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From: Alain Martel
Subject: Re: Fourier transform of an image?
Date: 15 Oct 2019 17:27:44
Message: <5da60190$1@news.povray.org>
Le 2019-10-15 à 09:52, gregjohn a écrit :
> Hi, I know that povray enables several kinds of image processing, if you load an
> image as a pigment pattern.  I'm listening to some advanced lectures on
> microscopy, and they are talking about doing a Fourier transform on an image.
> 
> Q: How easy is it to do this in povray?  TIA
> 
> 

I don't know, but, if you save as a .JPG, then, there is a Fourier 
transform performed while encoding the image.


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From: Bald Eagle
Subject: Re: Fourier transform of an image?
Date: 15 Oct 2019 18:00:00
Message: <web.5da608e0193c79904eec112d0@news.povray.org>
"gregjohn" <pte### [at] yahoocom> wrote:
> Hi, I know that povray enables several kinds of image processing, if you load an
> image as a pigment pattern.  I'm listening to some advanced lectures on
> microscopy, and they are talking about doing a Fourier transform on an image.
>
> Q: How easy is it to do this in povray?  TIA

I haven't been able to do it - yet.
But I've been getting better at implementing stuff like this.

I'm thinking that if you need it any time soon - use a 3rd party package.

It's been a while since I've wrestled with the FFT.

1D:
http://news.povray.org/povray.binaries.images/thread/%3Cweb.58b813187922eedfc437ac910%40news.povray.org%3E/?ttop=428294
&toff=350


http://news.povray.org/povray.binaries.images/thread/%3Cweb.58bd5ea376ca50b7c437ac910%40news.povray.org%3E/?ttop=428294
&toff=350


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