Windows

The smoothing is applied by the way of a bi-exponential filter, itself realized by a pair of one-tap recursions. It is therefore very fast; moreover, its computational cost is truly independent of the amount of smoothing. Meanwhile, the preservation of edges is obtained by a range filter akin to the range filter found in a bilateral filter. More technical details are available here.

The plugin allows one to control the amount of smoothing, the type of range filter, its broadness, and to iterate the filter several times if desired. We illustrate in Figure 2 a possible outcome of this filter. Here, we iterated the BEEPS 10 times with a Gaussian range filter, σ = 10, and the spatial decay λ = 0.1.

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.