Free and open source

Dithering is a type of half tone thresholding where greyscale (or RGB channel) intensity is converted into a local density of binary pixels. This is ideal for rendering images in devices with a binary output such as printers (greyscale) or with a small number of colours (colour dithering). The following methods have been implemented (there are several more):

• Floyd-Steinberg
• Atkinson
• Jarvis-Judice-Ninke
• Stucki
• Bayer_2x2
• Bayer_4x4
• Bayer_8x8
• Clustered_4x4
• Random

Here is a good text explaining various dithering algorithm.

The 3D Rotation plug-in allows you to record a 360 degree rotation of the current focused 3D VTK viewer about the vertical screen axis.

The 'angle step' parameter indicates the deviation in degrees between two consecutive snapshots. Increasing the angle will increase rotation speed (up to a point where it might look like jumping more than rotating) and reduce the final movie length.

This Matlab code is the 3D extension of the Generalized Riesz-Wavelet Toolbox for Matlab.

JRuby script that will take an image stack and generate from it an image that should appear in 3D when viewed through red and cyan glasses. All that this does is to do two maximum intensity projections from two slightly different angles and merges them together.

The purpose of this plugin is to create a text file with a list of files from Gatan’s 3View montage image stacks. This text file can then be used to automatically import all the images into TrakEM2, as they are, stored in the original directories.