# Changes

## Shape Filter

, 17:26, 13 December 2018
Fix "list of update sites" link
| software = ImageJ/Fiji
| name = Shape Filter Plugin
| author = Thorsten Wagner{{Person|Twagner}}| maintainer = Thorsten Wagner (wagner@biomedical-imaging.de){{Person|Twagner}}
| filename = shape_filter_x.y.z.jar [https://github.com/thorstenwagner/ij-shape-filter/releases/latest [1]]
| source = Github [https://github.com/thorstenwagner/ij-shape-filter [2]]
| status = active
}}
== General Description ==
The ImageJ Shape Filter Plugin uses use the [https://github.com/thorstenwagner/ij-blob [ij-blob]] library to characterize and filter objects in binary scenes by its shape. Therefore, several features are calculated as shown below.[[File:Ridge Detection ParametersShape Filter GUI.png|150px200px|thumb]] If you like to cite the Shape Filter plugin in a scientific publication, please cite: Wagner, T and Lipinski, H 2013. IJBlob: An ImageJ Library for Connected Component Analysis and Shape Analysis. Journal of Open Research Software 1(1):e6, DOI: http://dx.doi.org/10.5334/jors.ae  == Shape Features ==
* '''Area''' ($A$): The area enclosed by the outer contour of an object.
* '''Feret Diameter''': The maximum distance between the two parallel tangents touching the particle outline in all directions.
* '''Min. Feret Diameter''': the minimum distance between the two parallel tangents touching the particle outline in all directions.
* '''Max. Inscr. Circle Diameter''': The diameter of the maximum inscribed circle.* '''Area eq. circle diameter''': Equivalent circle diameter $2\sqrt{\frac{A}{\pi}}$* '''Long Side Minimum Bounding Rectangle'''($L$): The larger side of the minimum bounding rectangle.* '''Short Side Minimum Bounding Rectangle'''($S$): The smaller side of the minimum bounding rectangle.
* '''Aspect Ratio''': Defined as $L/S$
* '''Area to Perimeter Ratio''': Defined as $A/P$
* '''Thinnes Ratio''': Inverse proportional to the circularity. Furthermore it normed. It is defined as $4\pi A/P^{2}$
* '''Contour Temperatur''': It has a strong relationship to the fractal dimension, defined as $\left(log_{2}\left(\frac{2P}{P-H}\right)\right)^{-1}$
* F'''ractal Orientation''': The orientation of the major axis from in grad (measured counter clockwise from the positive x axis).* '''Fractal Box Dimension''': Estimated fractal dimension by the box count algorithm. The default box-sizes are “2,3,4,6,8,12,16,32,64”.
=Installation= Other test===You could simply use our update site "{{ListOfUpdateSites|Biomedgroup}}" to install the shape filter plugin.