Semi-Automatic Integrated Segmentation Approaches and Contour Extraction Applied to Computed Tomography Scan Images

Algorithm 2

Algorithmic representation of watershed procedure.

define a slope for each pixel

for each pixel value,

    calculate topographical distance

    estimate gradient for gray-level values.

    for each image gradient threshold identification,

   perform edge-preserving,

   represent gradient magnitude,

   generate merge tree,

   access segmented image,

   acquire segmentation tree.