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Created OnDecember 20, 2018
Last Updated OnJanuary 11, 2019
byCedric van den Berg
From Endler 2012: An example of a simplified clutered butterly consisting of the colour pattern elements ‘black’ and ‘grey’ and the background ‘white’

The Adjacency Analysis (Endler 2012) is an analytical framework designed to capture colour pattern geometry. It is based on the concept of running horizontal and vertical sampling transects over a segmented image (Fig. 1) where the transitions from one pixel to the next are recorded. This results in a transition matrix (Fig. 2) which can then be used to calculate a vast array of pattern parameters.

From Endler 2012: An example of a hypothetical transition matrix derived from the segmented image above. The diagonal shows ‘non-transition’ (Transition where the pattern element stayed the same) whereas the off-diagonal shows the transitions between pattern elements (‘Who’s next to whom and how much’)

Detailed equations and a complete list of pattern parameters can be found in the suppl. material and the MICA manual. The parameter list is by far not exhaustive (Despite being significantly expanded beyond parameters discussed in Endler 2012) and we are happy to discuss new additions to the list.

Adjacency Analysis
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