Orfeo Toolbox - Open Source Geospatial Tools: Applications in Earth Observation - page 204

(b)

(a)

Fig. 13.6 Segmentation using mean shift algorithm. a Min size 100 pixels (default). b Min size 50
pixels

(a) (b)

Fig. 13.7 Segmentation using Edison algorithm. a Min Size 100 pixels (default). b Min size 50
pixels

Table 13.1 Segmentation algorithm and minimum size and resulting number of segments
Segmentation algorithm Minimum size (pixels) Number of segments

Mean shift 100 794

Mean shift 50 1,493

Edison 100 1,167

Edison 50 1,949

A useful feature of using the segmentation algorithm in vector mode is that it
can be run on very large images by using tile-wise segmentation. This process will
stitch the regions between tiles, however it only mitigates the artefacts between tiles.
A recent update to the application is the lsms framework, which allows tile-wise
MeanShift segmentation resulting in exact results at once without any artefacts.