Slide 18 of 42
The histogram volume is the tool we use for this. As the name might
imply, its just a three dimensional histogram, with the axes f, f' and
and f''. Each bin in the histogram volume corresponds to a
combination of small ranges of values in each of those axes.
Calculating a histogram volume is really simple. At each voxel in the
original image, you measure f, f', and f''; you find the corresponding
bin in the histogram volume, and then you increment its value by one.
That's it. It's pretty simple.
