POV-Ray: Newsgroups: povray.binaries.images: Edge detection filter

POV-Ray : Newsgroups : povray.binaries.images : Edge detection filter		Server Time 4 Nov 2025 02:30:20 EST (-0500)

From: Bald Eagle
Subject: Edge detection filter
Date: 20 Apr 2020 20:35:02
Message: <web.5e9e3e93521c7ab7fb0b41570@news.povray.org>

I came across a basic video on matrices and their uses, and played around with
applying a simple edge-detection matrix to - the POV-Ray logo.

It's all in SDL and was 56 seconds of parse time for 400x400 pixels, so it's not
a fast thing by any stretch.

Maybe there are some more interesting matrices to apply, but I know there's been
some recent interest in this sort of thing.

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From: Mr
Subject: Re: Edge detection filter
Date: 25 Apr 2020 13:00:00
Message: <web.5ea46b82df855c166adeaecb0@news.povray.org>

"Bald Eagle" <cre### [at] netscapenet> wrote:
> I came across a basic video on matrices and their uses, and played around with
> applying a simple edge-detection matrix to - the POV-Ray logo.
>
> It's all in SDL and was 56 seconds of parse time for 400x400 pixels, so it's not
> a fast thing by any stretch.
>
> Maybe there are some more interesting matrices to apply, but I know there's been
> some recent interest in this sort of thing.

There is interest indeed :-)

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