[sct_segment_graymatter] correct background value #1133
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Bug was that background value of WM segmentation was not null, inducing a bias when computing WM CSA. --> Bug occurred during the interpolation of WM segmentation back into the native image space. --> Corrected by setting negative values to zero right after the label fusion (only very few voxels had negative values).
jcohenadad
approved these changes
Jan 30, 2017
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Bug was that background value of WM segmentation was not null, inducing a bias when computing WM CSA.
--> Bug occurred during the interpolation of WM segmentation back into the native image space.
--> Corrected by setting negative values to zero right after the label fusion (only very few voxels had negative values).