Hello Michael,
No voxels are explicitly excluded from the calculation. The
two input images are ( depending on command line options )
demeaned and then all timepoints and voxels are looped
across to generate
(image1_timepoint1*image2_timepoint2)/(sumsquares(image1_timepoint1).sumsquares(image1_timepoint2))
Hope this helps
Matthew
>
>> Hello,
>> I want to compute to the correlation (across voxels) of two images, and
>> my understanding is that's what 'fslcc' is for. But, it isn't obvious
>> to me what determines which specific voxels go into that calculation.
>> If a voxel is zero in EITHER input volume, is that voxel then excluded
>> from the calculation? (in which case I can control the voxels that
>> contribute to the calculation by thresholding my input appropriately
>> beforehand?)
>>
>> thanks,
>> -MH
>>
>>
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