DICOM to TIFF inverted LUT ... Python & PIL

Question

I am using the frombuffer command to save DICOM image data as TIFF images. But somehwere throughout this process, the image intensities are inverted (inverted LUT). Any idea on how to overcome this?

I have tried using the ImageOps.invert function from PIL, but if gives me "not supported for this image mode" error.

This is the code I'm using:

import dicom
import Image
import PIL.ImageOps

meta=dicom.read_file("DicomImage.dcm") 
imHeight=meta.Rows
imWidth=meta.Columns 
imSize=(imWidth,imHeight)
TT=Image.frombuffer("L",imSize,meta.PixelData,"raw","L",0,1)
TT.save("testOUTPUT.tiff","TIFF",compression="none")

Any guidance is appreciated ... Python 2.7 PIL 1.1.7 Pydicom 0.9.6

score 2 · Answer 1 · edited Aug 11 '13 at 18:33

2

Rather than "" for the raw mode, you should be using one of the mode strings from the documentation. Try "L" or "L;I", one or the other should be correct.

edited Aug 11 '13 at 18:33

Jonathan Root

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answered Feb 16 '12 at 17:27

Mark Ransom

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I have tried both, but the I need to maintain the 16bit status of the image intensities. – Masrawy Feb 16 '12 at 18:57
@Masrawy, look at this link and see if it helps: http://stackoverflow.com/questions/7247371/python-and-16-bit-tiff – Mark Ransom Feb 16 '12 at 19:10

DICOM to TIFF inverted LUT ... Python & PIL

1 Answers1