[Insight-developers] Extending the Analyze Reader to read/write RGB files?

[Luis Ibanez]

Hi Kent,

Maybe I messed up...


I assigned that feature request to you because I thought
that you were already working on it.

I recalled that you were dealing with some RGB issues...

       Maybe it wasn't with Analyze ?

My apologies if the content of the bug is different from
what you were working on.


     Luis



--------------------
kent williams wrote:
> Thanks to Luis, I guess I'm supposed to get the itk::AnalyzeImageIO to
> support RGB analyze files.
> 
> Unfortunately, I can't find any place that describes the data layout of
> Analyze 7.5 RGB files.  The NIfTI reader seems to assume that each 24-bit
> RGB pixel is contiguous in memory.
> 
> The Analyze 7.5 reader has a bunch of stuff from the original BRAINS2
> Analyze file reader, which is commented out, and it suggess that RGB files
> are written out as an R volume followed by a G volume followed by a B
> volume.  Now, the code that's commented out, when I look at it, seems really
> wrong and old -- old enough and wrong enough that I don't trust its
> assumptions.
> 
> But that commented-out code raises my doubts about what the true Analyze 7.5
> RGB data layout is.  And Google search turns up one sketchy PDF file about
> the 7.5 format that doesn't explain RGB image format, and the actual Analyze
> 7.5 header is no more informative.
> 
> Does anyone know what the answer is, and does anyone have examples of that
> rara avis, an RGB Analyze7.5 file?
> 
> And is there an application that can READ an RGB Analyze 7.5 file? The
> original bug report complained about not being able to WRITE such an image
> file, and makes no mention of being able to read one.
> 
> Now, if a developer is writing files out to be read in with any modern
> application, Analyze files are a poor choice -- in this case, I'd suggest
> using a NIfTI file instead.  If they're using an old program that claims to
> be able to read RGB Analyze files, I can understand.
> 
> And a further mystery -- who is x25c54?
> 
> 
> 
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