Algorithm 5.

Synthetic Brainbow (colorization of a grayscale volume with size constraint)

Define S the scalar volume of original data;

Define ID the ID volume generated by Algorithm 3;

Define B a Boolean volume whose voxels represent if they are in a component with size over a threshold;

For each cell in ID

M = the measure of features in S;

N = a sample from a 4D noise function;

If M > N and !B

The cell’s ID is replaced by the maximum ID within its neighborhood;