POV-Ray: Newsgroups: povray.binaries.images: Problem with the image saved to disk

POV-Ray : Newsgroups : povray.binaries.images : Problem with the image saved to disk		Server Time 13 Nov 2024 03:47:16 EST (-0500)

From: zalakainz
Subject: Problem with the image saved to disk
Date: 6 Jan 2011 03:35:01
Message: <web.4d257d835ba2b92bb0720d810@news.povray.org>

This image is a windows capture

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From: zalakainz
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 03:45:01
Message: <web.4d25808c7c2d78a3b0720d810@news.povray.org>

This is the image saved to disk

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From: Roman Reiner
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 06:30:00
Message: <web.4d25a78b7c2d78a3959c275d0@news.povray.org>

Maybe this helps to illustrate the problem.
I differenced the images in photoshop and raised the contrast.

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From: Dave Blandston
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 07:00:01
Message: <web.4d25aeb67c2d78a35f9997c70@news.povray.org>

"zalakainz" <zal### [at] yahooes> wrote:
> This is the image saved to disk

OK, I'm just taking a guess here since I just spent a lot of time trying to set
gamma stuff up right - make sure the "display_gamma" and "file_gamma" settings
in your POVRAY.INI file are correct (probably 2.2), and your monitor is adjusted
properly. I'm no expert in this regard but that's something you should check.
The gamma stuff built into POV-Ray is really useful but HAS to be ajusted
correctly.

Regards,
Dave Blandston

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From: Dave Blandston
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 11:00:00
Message: <web.4d25e6a17c2d78a35f9997c70@news.povray.org>

And make sure you add the line "assumed_gamma 2.2" to your scene file...

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From: zalakainz
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 12:35:01
Message: <web.4d25fccf7c2d78a3b0720d810@news.povray.org>

"Dave Blandston" <nomail@nomail> wrote:
> And make sure you add the line "assumed_gamma 2.2" to your scene file...

Clarified:

http://news.povray.org/web.4d25b0127c2d78a3b0720d810%40news.povray.org


I think the best photorealistic combination is:
 1 .- "assumed_gamma 1" if you have a calibrated monitor to the sRGB standard.
 2 .- inverse gamma correction to color and texture if needed. This has been
automated with the keyword "srgb".

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From: clipka
Subject: Re: Problem with the image saved to disk
Date: 6 Jan 2011 15:32:08
Message: <4d2626c8$1@news.povray.org>

Am 06.01.2011 18:33, schrieb zalakainz:

> I think the best photorealistic combination is:
>   1 .- "assumed_gamma 1" if you have a calibrated monitor to the sRGB standard.
>   2 .- inverse gamma correction to color and texture if needed. This has been
> automated with the keyword "srgb".

Yup. For photorealism that's the way to go.

(Dave's recommendations for Display_Gamma and File_Gamma still hold though.)

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