Sunday, February 7, 2010

Matching things up - SIFT Landmark matching via OTB

Orfeo Toolbox has implemented a few landmark identification techniques - SIFT and SURF. Transforms can be calculated from 2 sets of landmark points using an appropriate model. I had some trouble bringing it to Qgis, the output is just one band. The sample code needs to be extended to work with multi-band images. The in-memory representation of the match images is in double, this can cause array allocation failures. Otherwise this feature matching provides correlation free image matching for images with different dynamics - such as SAR to Optical.
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