Plugins for 3D Image processing and Analyisis in ImageJ. Previously (?) known as 3D ImageJ Suite.
For post-processing analysis, use Analyze Skeleton plugin written by the same author.
Perform morphological operations (like erode and dilate or open and close) on images.
Icy Morphomath operators: erosion, dilation, opening, closing, top-hat, gradient, distance map, skeleton and watershed.
