CODEWITHSUNDEEP
python-3.7pydicom
deepthought
deepthought

Reputation: 87

Rescaling Dicom pixel values to be in the range [0,1]

I haven't been able to find the range of values that is returned from .pixel_array so I'm not sure how to scale the values to a custom range like [0,1]. Is there a pydicom inbuilt function that does this already?

Upvotes: 3

Views: 450

Answers (1)

scaramallion
scaramallion

Reputation: 1330

A combination of Bits Stored and Pixel Representation should be enough for Pixel Data:

from pydicom import dcmread

ds = dcmread("/path/to/dataset")
if ds.PixelRepresentation == 0:
    # Unsigned integers
    min_px = 0
    max_px = 2**ds.BitsStored - 1
else:
   # Signed integers
    min_px = -2**(ds.BitsStored - 1)
    max_px = 2**(ds.BitsStored - 1) - 1

Upvotes: 4

Related Questions