I'm new to OTB, but have the same need to do OBIA. I just finished a project where we used a proprietary segmentation module then using python integrated the results with scikit-learn. I'm rewriting that to work with otb LSMS Segmentation which works much better. So my current workflow is something like this:
step 1: run LSMSSegmentation and get polygon shapefile with attributes like: Num Name Type Len Decimal 1. LABEL N 9 0 2. NBPIXELS N 9 0 3. MEANB0 N 24 15 4. MEANB1 N 24 15 5. MEANB2 N 24 15 6. MEANB3 N 24 15 7. MEANB4 N 24 15 8. MEANB5 N 24 15 9. VARB0 N 24 15 10. VARB1 N 24 15 11. VARB2 N 24 15 12. VARB3 N 24 15 13. VARB4 N 24 15 14. VARB5 N 24 15 step 2: and then to that I add polygon stats based roughly on FRAGSTATS like: 15. AREA N 24 15 16. PERIM N 24 15 17. PARA N 24 15 18. COMPACT N 24 15 19. COMPACT2 N 24 15 20. SMOOTH N 24 15 21. SHAPE N 24 15 22. FRAC N 24 15 23. CIRCLE N 24 15 step 3: In my case I load these into a postgres database where we have training polygons and we select the polygon segments that match our exemplars step 4: and feed them into scikit-learn to build a trained classifier. step 5: we segment a search areas and add the polygon stats as above step 6: we run those segments through trained classifier to get probability that they belong to a specific class. It sounds like otb has modules for the classifiers that I might need to look into, but I like using the database just because there is a lot of data to manage. Gluing everything together with python means I can automate the workflow and the data management of various runs against different areas. -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to otb-users@googlegroups.com To unsubscribe from this group, send email to otb-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to otb-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
