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Dear all,
I'd like to save my raytraced image as 16bit/color PNG and eventually
convert the PNG into either 16bit grayscale PNG or 16bit grayscale TIF,
which would result in a range of zero to 65,535 steps in gray level.
When I write down the +FN16, would this be a compressed 16bit per color PNG?
Would there be any other options inside the POV-ray with which I could save
it as 16bit grayscale PNG or 16bit grayscale TIF?
Thanks,
Jong
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From: Christoph Hormann
Subject: Re: Saving output as 16bit grayscale PNG
Date: 18 Jul 2002 05:58:03
Message: <3D36912B.3CC46F12@gmx.de>
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Jong wrote:
>
> Dear all,
>
> I'd like to save my raytraced image as 16bit/color PNG and eventually
> convert the PNG into either 16bit grayscale PNG or 16bit grayscale TIF,
> which would result in a range of zero to 65,535 steps in gray level.
> When I write down the +FN16, would this be a compressed 16bit per color PNG?
> Would there be any other options inside the POV-ray with which I could save
> it as 16bit grayscale PNG or 16bit grayscale TIF?
When you use '+fn16' you will get a 3x16 bit rgb PNG file. When
specifying 'hf_gray_16 on' in global_settings you will always get a 16 bit
grayscale PNG with '+fn'. Same applies for PPM (+fp).
Christoph
--
POV-Ray tutorials, IsoWood include,
TransSkin and more: http://www.tu-bs.de/~y0013390/
Last updated 15 Jul. 2002 _____./\/^>_*_<^\/\.______
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Thank you, Chris.
Works perfect!
One more newbie question about the gray level or color calculation of the
POV for precision:
In order to get higher precision output such as 16 bit/color PNG, what
parameters should be adjusted?
For example, do I better change the adc_bailout value from 1/255 default to
1/65000?
Are there any to be changed accordingly?
Jong
"Christoph Hormann" <chr### [at] gmx de> wrote in message
news:3D36912B.3CC46F12@gmx.de...
>
>
> Jong wrote:
> >
> > Dear all,
> > I'd like to save my raytraced image as 16bit/color PNG and eventually
> > convert the PNG into either 16bit grayscale PNG or 16bit grayscale TIF,
> > which would result in a range of zero to 65,535 steps in gray level.
...
> > it as 16bit grayscale PNG or 16bit grayscale TIF?
>
> When you use '+fn16' you will get a 3x16 bit rgb PNG file. When
> specifying 'hf_gray_16 on' in global_settings you will always get a 16 bit
> grayscale PNG with '+fn'. Same applies for PPM (+fp).
>
> Christoph
>
> --
> POV-Ray tutorials, IsoWood include,
> TransSkin and more: http://www.tu-bs.de/~y0013390/
> Last updated 15 Jul. 2002 _____./\/^>_*_<^\/\.______
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