``Salt_and_Pepper_Removal'' -- remove salt and pepper (spike) noise

purpose:

If a voxel deviates from its local-neighborhood's mean intensity by > (``spread'' %10) mean, then change the voxel's intensity to the value of the mean. This is meant to reduce the noise from wildly diverging voxels (i.e., spikes).

input:

An 8-bit volume.

output:

An 8-bit volume.

parameters:

Default parameters menu is

x filter dim = 3
y filter dim = 3
z filter dim = 3
spread(%x*10 from mean)= 1
no. of iterations = 1
input from vol # = 0
copy output to vol # = 0

The parameters ``x filter dim = '', ``y filter dim = '', and ``z filter dim = '' specify the size of the local neighborhood.

comments:

 

1. This is a moderately fast operation.