Re: [Boost-users] [Gil] TIFF file with mixed 8/16 bit channel

Subject: Re: [Boost-users] [Gil] TIFF file with mixed 8/16 bit channel
From: Corinna Kinchin (crin_at_[hidden])
Date: 2011-11-07 05:02:56

Hey Christian,

Many thanks for your response, good luck with the fix and
it would be marvellous if you are able to keep us posted 
on progress ...

Meanwhile I have another TIFF file to hand (also generated
by Photoshop) which has these characteristics:

  Colorspace: CMYK
  Depth: 16-bit
  Channel depth:
    cyan: 16-bit
    magenta: 16-bit
    yellow: 16-bit
    black: 15-bit
    alpha: 16-bit

Let me know if you'd like a copy to test with.

All the best,

Corinna ...

 Corinna Kinchin                 email: ckinchin_at_[hidden]
 Datazone Ltd.                   Tel:   [phone]
 Palm Gate, Greenane,            Fax:   [phone]
 Killarney, Co. Kerry, Ireland   URL:   http://www.miramo.com

 Datazone - makers of `Miramo', the automated publishing tool

> 
> Hi Corinna,
> 
> I have been busy trying to load your picture but some internals of the
> tiff reader doesn't allow for that right now. Hopefully I can fix
> soon.
> 
> > I'm just downloading the latest boost version (am using 1.42 at the moment
> > which doesn't seem to have the cymk16161688_image_t you refer to)
> > and will try out your suggestion.
> 
> You have to build such image type. Here is how you do it:
> 
> typedef bit_aligned_image5_type< 16, 16, 16, 8, 8, cmyka_layout_t
> >::type image_t;
> 
> >
> > And this is almost certainly an RTFM question but how does one know
> > which input image type to use? If you had a moment to point me in
> > the right direction or to jot down an elegant code snippet to get
> > me on the right track for reading different flavours of TIFF files
> > I'd be eternally grateful ...
> 
> You could use a dynamic_image. See the dynamic_image extension.
> 
> Regards,
> Christian
> 
>