Re: [Gdcm2] Buffer problem in Qt environment

[Sylvain A. <syl...@ho...>]

Yep, that's exactly why I've chosen to use the RGB 24 bits format in 8-8-8, which displays the image without losing too much information in 8-bits.

As I didn't know before and I was passing the 16-bits buffer to a RGB16 format, this is why I had a weird blue-green image.

By the way, Mathieu, have you acknowledged my bug description?

> Date: Wed, 17 Jun 2009 16:17:59 +0200
> Subject: Re: [Gdcm2] Buffer problem in Qt environment
> From: mat...@gm...
> To: mm...@gm...
> CC: syl...@ho...; gdc...@li...
> 
> On Wed, Jun 17, 2009 at 4:08 PM, Mark Roden<mm...@gm...> wrote:
> > Hi all,
> >
> > Just as a side note, a 16bit rgb image is 5 bits red, 6 bits green, 5
> > bits blue-- QtImage does not support 16 bit monochrome.  If it did,
> > that would be 48bit rgb, and you'd just make each channel the
> > monochrome information.  Another gotcha along the same lines has to do
> > with Microsoft's bitmap classes; they _say_ that they support 16 bit
> > monochrome, but if you dig into the documentation, there's a note that
> > says something along the lines of "Who needs this?  I don't know, so
> > we won't implement it."  The fix there is to go to 48 bit bitmaps,
> > which work just fine.
> 
> Thanks ! I just updated Sylvain's sample and realize that QImage also
> has the same drawback, you cannot simply pass a 16bit buffer :(
> 
> 
> $ svn ci -m"style"
> Sending        Cxx/CMakeLists.txt
> Sending        Cxx/ConvertToQImage.cxx
> Transmitting file data ..
> Committed revision 5838.
> 
> -- 
> Mathieu

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