[Dcmlib] Signed Images

[Jean-Pierre Roux]

Aris Basic wrote:

> is gdcm doing any conversion on pixel data from signed 
> (pixelrepresentation == 1) images ?
> pixelrepresentation == 0 images i can display nicely but 
> representation 1 they come up strange :(


gdcm doesn't make any transformation for 'signed pixels'.
It's up to the user to deal with the sign.
How do you display the image?
Did you try with vtkgdcmViever? (of course, you need VTK ...)

In our test data set ( gdcmData), there are a few 'signed pixels' images :

MR-MONO2-16-head.dcm 
CT-MONO2-16-chest.dcm
CT-MONO2-16-ankle.dcm  
CT-MONO2-16-ort.dcm
CT-MONO2-16-brain.dcm
GE_RHAPSODE-16-MONO2-JPEG-Fragments.dcm 
GE_GENESIS-16-MONO2-Uncompressed-UnusualVR.dcm
GE_GENESIS-16-MONO2-WrongLengthItem.dcm 
PICKER-16-MONO2-No_DicomV3_Preamble.dcm
012345.002.050.dcm

Did you try to display them?
HTH.

Jean-Pierre

>
> jsut trying to find a bug :) not pointing fingers

Thx for reporting it.
Could you send us one of your images, so we can check 'at home' if there 
is any problem.

>
>
> Aris
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