Re: [Gdcm2] convert dicom to jpg/png

[Mohica J. <moh...@gm...>]

Mathieu,

gdcmconv, gdcmimg work on some other dicom images I have without any
error and I can properly open the pnm file:
gdcmconv --raw test.dcm test.raw.dcm
gdcmimg test.raw.dcm test.pnm

However it doesn't work on that CT1_JLSL.dcm

I wonder if there is any way to make it work against CT1_JLSL.dcm. How
can I convert signed representation to unsigned if this is what makes
it failed

[root@localhost ~]# gdcminfo CT1_JLSL_raw.dcm
MediaStorage is 1.2.840.10008.5.1.4.1.1.2 [CT Image Storage]
TransferSyntax is 1.2.840.10008.1.2.1 [Explicit VR Little Endian]
NumberOfDimensions: 2
Dimensions: (512,512,1)
SamplesPerPixel    :1
BitsAllocated      :16
BitsStored         :16
HighBit            :15
PixelRepresentation:1
ScalarType found   :INT16
PhotometricInterpretation: MONOCHROME2
PlanarConfiguration: 0
TransferSyntax: 1.2.840.10008.1.2.1
Origin: (-158.136,-179.036,-75.7)
Spacing: (0.661468,0.661468,1)
DirectionCosines: (1,0,0,0,1,0)
Rescale Intercept/Slope: (-1024,1)
Orientation Label: AXIAL

Thank you very much in advance

On Wed, Mar 11, 2015 at 10:57 AM, Mathieu Malaterre
<mat...@gm...> wrote:
> On Wed, Mar 11, 2015 at 3:42 PM, Mohica Jasha <moh...@gm...> wrote:
>> Hi Mathieu,
>>
>> [root@localhost ~]# gdcmconv --raw CT1_JLSL.dcm CT1_JLSL_raw.dcm
>> [root@localhost ~]# gdcmimg CT1_JLSL_raw.dcm CT1_JLSL_raw.dcm.pgm
>> Problem writing PNM file
>
> If you use gdcminfo on CT1_JLSL_raw.dcm you'll see that the image has
> a signed representation for pixel data. PNM (aka PGM) do not support
> storing of signed data, hence the error.
>
> Try on unsigned dataset first.
>
> 2cts