07 - Complex Objects and Distributions

Question 1

Skeletonization

Answer 1

• examples = roads, roots, rivers, blood vessels
• connections: where, how?
• segment, label, distance map
• skeleton using Laplacian filter and locate local maxima then threshold OR morphological thinning OR built-in function

Question 2

Skeleton parameters, topology

Answer 2

• jct° overview
• segment length
• segment width
• endpoints
• tortuosity = L/C
• degree of connectivity

Question 3

Watershed segmentation

Answer 3

• uses structure’s shape and determine substructure with distance maps
• segment, distance map, local maxima
• watershed = flowing downhill using elevation maps
• remove too small objects
• scaling back up, combine split obj (cutoff on interface length)