<put algortithm description here>
Input Image
[raster]Segmented image
[raster]Size of tiles in pixel (X-axis)
[number]<put parameter description here>
Default: 500
Size of tiles in pixel (Y-axis)
[number]<put parameter description here>
Default: 500
Output GIS vector file
[vector]processing.runalg('otb:exactlargescalemeanshiftsegmentationstep4', -in, -inseg, -tilesizex, -tilesizey, -out)