``fill concave gaps'' - fill concave gaps in objects

VFX name:

iConcaveGapFill

IMPROMPTU Equivalent:

Concave_gap_filling

purpose:

Fill concave gaps in a specified direction for a specified subsection of the input volume. To do this for the transverse direction, a 3$\times$3$\times$ (last_slice - first_slice + 1) closing is performed on the volume. For sagittal, a 3$\times$ (last_slice - first_slice + 1)$\times$3 closing is performed. For coronal, a (last_slice - first_slice + 1) $\times$3$\times$ closing is performed. In all cases, the analysis is done between slices numbered from first_slice to last_slice. A closing is an operation from mathematical morphology [25,19].

input:

An 8-bit volume.

output:

An 8-bit volume.

parameters:

Default parameters menu is

direction = transverse
first_slice = 1
last _slice = 1

comments:

1.

Note that the size of the gaps filled is determined by the total number of slices to analyze. This is a little peculiar for filling gaps in the transverse plane. Thus, to fill gaps of width=5 in the transverse plane, you may have to repeat this procedure a number of times on groups of 5 slices.

2.

This operation takes a moderate amount of computation time.