POV-Ray: Newsgroups: povray.general: differencing images

POV-Ray : Newsgroups : povray.general : differencing images		Server Time 7 Aug 2024 11:24:30 EDT (-0400)

From: Ruy
Subject: differencing images
Date: 7 Oct 2001 21:24:36
Message: <3bc10054@news.povray.org>

I've been through Christoph Hormann's radiosity tutorial and found the
method of differencing pictures very useful as to check how different sets
of parameters work when compared to eachother.

How is that differencing accomplished?

Ruy

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From: Christoph Hormann
Subject: Re: differencing images
Date: 8 Oct 2001 02:03:53
Message: <3BC142B3.6989F1AE@gmx.de>

Ruy wrote:
> 
> I've been through Christoph Hormann's radiosity tutorial and found the
> method of differencing pictures very useful as to check how different sets
> of parameters work when compared to eachother.
> 
> How is that differencing accomplished?
> 

It's done with Pain Shop Pro's Image Arithmetic, most other imaging
programs should contain similar functions.  After differencing, usually
contrast is increased.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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From: Peter Popov
Subject: Re: differencing images
Date: 8 Oct 2001 16:53:25
Message: <sa44stkdimjl9g6h114lugf8q6hp9qrmlp@4ax.com>

On Mon, 08 Oct 2001 08:07:47 +0200, Christoph Hormann
<chr### [at] gmxde> wrote:

>It's done with Pain Shop Pro's 
                ^^^^

You're into S&M? :))


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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From: Ron Parker
Subject: Re: differencing images
Date: 8 Oct 2001 16:54:34
Message: <slrn9s44kk.351.ron.parker@fwi.com>

On Mon, 08 Oct 2001 23:50:05 +0300, Peter Popov wrote:
>On Mon, 08 Oct 2001 08:07:47 +0200, Christoph Hormann
><chr### [at] gmxde> wrote:
>
>>It's done with Pain Shop Pro's 
>                ^^^^
>
>You're into S&M? :))

Perhaps he just enjoys fine bread.

-- 
#local R=rgb 99;#local P=R-R;#local F=pigment{gradient x}box{0,1pigment{gradient
y pigment_map{[.5F pigment_map{[.3R][.3F color_map{[.15red 99][.15P]}rotate z*45
translate x]}]#local H=pigment{gradient y color_map{[.5P][.5R]}scale 1/3}[.5F
pigment_map{[.3R][.3H][.7H][.7R]}]}}}camera{location.5-3*z}//only my opinions

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From: Christoph Hormann
Subject: Re: differencing images
Date: 8 Oct 2001 18:11:19
Message: <3BC22542.31F6BBF9@gmx.de>

Peter Popov wrote:
> 
> You're into S&M? :))
> 

What's S&M?


BTW, if someone did not notice, it's of course Paint Shop Pro. ;-)

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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From: Tom Melly
Subject: Re: differencing images
Date: 9 Oct 2001 10:57:49
Message: <3bc3106d@news.povray.org>

"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3BC22542.31F6BBF9@gmx.de...
>
> What's S&M?
>

Oh, very convincing. Your secret's out...

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