“Interpretation of Marine Environments using Object Based
Image Analysis (OBIA)”


Monday May 2nd 2016, 9h00-18h00


Description The workshop for GeoHab 2016 will focus on object-based image analysis (OBIA), an increasingly applied image segmentation approach in both terrestrial and marine remote sensing. To interpret increasingly numerous and detailed imagery, expert interpretation and manual digitization of boundaries is often too time consuming or too subjective to produce the required outputs.  By identifying areas of similar statistical properties, OBIA provides a repeatable and efficient method to produce categorical maps based on a range of raster imagery (including bathymetry, backscatter, derived environmental variables such as slope or aspect, aerial photography, etc.) covering the same geographic areas.  The delineated areas can then be subjected to various supervised or unsupervised classification algorithms.  Although, different approaches to OBIA and software will be presented and discussed, the sessions will also be directed at newcomers to the approach with hands on time dedicated to trying some of the available software.


Objectives The aim of this workshop is to both give a space for expert OBIA users to discuss their experience and exchange best practice approaches as applied to a variety of marine landscapes and developed to achieve an array of objectives, as well as provide newcomers a chance to assess whether this approach may be of interest for their specific dataset.


Overview In the morning invited talks will cover topics such as background on OBIA, available software and selected case studies from different marine environments.

This will be followed by a practical demonstration showcasing a worked example. An OBIA workflow that encompasses the relevant steps from project set-up to final habitat map production will be demonstrated on-screen.  Interested workshop participants will be supplied with a temporary license of the OBIA software eCognition and the relevant data sets to follow the worked example on their own laptops.  The freely available (for academic research only) RSOBIA, a toolbar for ArcGIS, will also be introduced and its capacities demonstrated.

The session will close with a panel discussion on the possibilities, challenges and future directions for the application of OBIA to marine acoustic data sets.  The panel will then be open to respond to questions from the audience.

Bringing a personal laptop is recommended but not essential.



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