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Message-ID: <002901c0b826$966ba940$2a02a8c0@andrewjnt>
From: "Andrew Jarvis" <andrew.jarvis@oisel.co.uk>
To: "Tiff mailing list" <tiff@olympiakos.com>
References: <Pine.BSF.4.21.0103280732060.3187-100000@joe.bluegin.net>
Subject: Re: Bit depth
Date: Thu, 29 Mar 2001 09:02:23 +0100
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I assume you mean BitsPerSample.

You are correct. When I read the specification I was unsure whether 10 and
12 were valid BitsPerSample values since it quotes values of just 4 or 8 for
grayscale images and Paintshop Pro will only accept 16.

On re-reading the specification the description of the Compression tag
states 'For example, if your data can be represented in 6 bits, set
BitsPerSample to 8 instead of 6,' which implies that any value is valid. (I
also hadn't realised that the image data is supposed to be packed with no
wasted bits.)

I shall use BitsPerSample as intended and wait for Jasc Software to catch
up!

Thanks
AJ

----- Original Message -----
From: "Joe Dumoulin" <joe@bresgal.com>
To: "Andrew Jarvis" <andrew.jarvis@oisel.co.uk>
Sent: Wednesday, March 28, 2001 4:32 PM
Subject: Re: Bit depth


> I don't know if I've done this correctly, but I use BITS_PER_PIXEL tag.
>
> Joe D
> -----
>
> On Wed, 28 Mar 2001, Andrew Jarvis wrote:
>
> > I am storing images from ten and twelve bit cameras using sixteen bits
per
> > sample.
> >
> > Is there an accepted method of recording the original image depth?
> >
> > AJ
> >
>
>

