There is a possibility to insert plugins with filters to customize image processing. Plugins are inserted into plugins directory inside main program path. There is an SDK with example plugins.

Attention! Plugins based on SDK version 2.2 will only run with at least Image Viewer 2.2.5 build 46, please update your version!

Skeletonization v1.0 (SDK 2.2)

This algorithm is an original skeletonization technique for binary images. All the procedures are sequential, resultant skeletons have all the required properties, including the 8-isotropy.
Plugin uses white color as background and black as foreground. Color images are converted into grayscale and them thresholded by 128.
Authors: Arley Ferreira de Souza and Dmitry V. Fedorov

SDK v2.2 contains two completely equal examples of plugin filters demonstrating the use of selection, passed function to show complete percentage and user interaction.