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distance

Built-in command

Arguments:

• isovalue[%],_metric    or
• isovalue[%],[metric],_method

Description:

Compute the unsigned distance function to specified isovalue, opt. according to a custom metric.

metric can be { 0=chebyshev | 1=manhattan | 2=euclidean | 3=squared-euclidean }.
method can be { 0=fast-marching | 1=low-connectivity dijkstra | 2=high-connectivity dijkstra | 3=1+return path | 4=2+return path }.

Default values:

metric=2 and method=0.

This command has a tutorial page.

Examples of use:

• Example #1

Command: image.jpg threshold 20% distance 0 pow 0.3

• Example #2

Command: 400,400 set 1,50%,50% +distance[0] 1,2 +distance[0] 1,1 distance[0] 1,0 mod 32 threshold 16 append c