Mask filter

The mask filter allows the extraction (passthrough) or exclusion
(block) of an image region based on a mask image into a new image
Non-zero statistics

The non-zero statistics filter calculates standard descriptive
statistics for an image, excluding all pixels that have a set value;
currently set value is zero for background. Especially useful in
combination with the mask filter.
Fill Holes filter

An iterative binary voting filter that determines the membership
(inclusion or exclusion) of a pixel based on the majority voting of the
neighbourhood pixels.
Connected Components filter

Straightforward recursive connected components algorithm; may not be as
fast as the best two-pass connected component filter, but this is a lot
easier to implement.
Additional measures

Include additional measures in the filtering procedures of the curve
tracing algorithm.
Enable latest filters

Enable latest filters in the plugin package as separate plugins.