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If you use this plugin, please cite it in your publication !

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MLB
23 Aug 2012 17:04
Thank you for this plugin !
How can I export the displacement map ?
(screenshot change the layer and save image as erase the map)

Optical Flow - Horn-Schunck

by Timothée Lecomte

This plugin computes a displacement map from a sequence of at least two consecutive images.

Publication Id
ICY-H6L2R4
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Documentation

This plugin analyses a pair of images and retrieves the displacement that transforms the first image into the second.

This is implemented as a 2D variational optical flow method. The problem formulation follows the energy-based Horn-Schunck method (B. Horn and N. Schunck, Determining Optical Flow, Artificial Intelligence, 17, 185-203, 1981). The discretization and the solving method differ from the original article in the following ways: the discretization is done with finite elements; the resulting linear system is solved with a Conjugate Gradient algorithm.

Note: there is a major limitation in the current implementation. There is no guarantee that it will detect properly movements larger than 1 pixel. This will be fixed in a future version, by doing a multiscale analysis.