plugin

A Mathematica package available for the symbolic computation of exponential spline related quantities: B-splines, Gram sequence, Green function, and localization filter.

Fill holes in objects 

Included into EBImage Image processing and analysis toolbox for R

Automatically crops an image by finding the smallest bounding box which still contains all pixels of the specified value.

Options include Pixel values, Margin, and more...

This KNIME node is included in the KNIME Image Processing Extension

Library used by Micro-Manager for fast acquisition.

Anisotropic filters are a class of filter that reduces noise in an image while trying to preserve sharp edges

There are two implementations of Tschumperle/ R. Deriche filter ("anisotropic diffusion") for ImageJ Plugin

1. in the "imaging book" codes: see the javadoc here.

2. in Xlib

Automatic finding of image features are very convenient for registering two images to align them in proper orientation. Two image plugins are implemented for extracting image features and are placed as menu items at: [Plugins > Feature Extraction > Extract SIFT Correspondences] and [Plugins > Feature Extraction > Extract MOPS Correspondences].

For more details, see the linked page in Fiji wiki. For details about SIFT algorithm, see 2569. For more details about MOPS algorithm, see 2570.