Re: OT: Looking for image file format that can handle 16b its per channel

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#111

From: Oliver Kreylos
Date: Thu, 30 Dec 1999 00:00

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Paul Richards wrote:
> 
> Victor Wagner wrote:
> >
> > Paul Richards <pauldoo@dunvegan1.demon.co.uk> wrote:
> > : Hi,
> > : Does anyone know of a simple image file format that I can use that can
> > : handle 16bits per channel?  In effect producing 48bit colour images?  I
> > : mean simple in that it'll be easy for me to write the input/output
> > : routines for in C++.
> >
> > ppm
> 
> PPM can't do 16bits per channel or 16bit greyscale which is what I'm
> looking for.

I think it can. The ASCII ppm format is rather flexible. AFAIK, you can
have arbitrarily large values per channel per pixel, you just should
give the maximal used value in the "maxValue" field.

The binary ppm format, on the other hand, supports only 8 bit values per
channel per pixel.

But since ASCII ppm is a horribly bloated format, I still suggest using
PNG. (ppm is *much* easier to read or write, though...)

  Oliver

-- 
Email: kreylos@cs.ucdavis.edu
WWW:   http://graphics.cs.ucdavis.edu/~okreylos

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From: Oliver Kreylos <kreylos@cs.ucdavis.edu>
Subject: Re: OT:  Looking for image file format that can handle 16b its per  channel
Date: 1999/12/30
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