Use of seafloor stereo-images to validate automatic classification of benthic habitats

TitleUse of seafloor stereo-images to validate automatic classification of benthic habitats
Publication TypeConference Proceedings
Year2014
AuthorsDi Stefano, Massimo, Masetti, Giuseppe, and Mayer, Larry A.
Conference NameGeoHab 2014
Conference DatesMay 5 - May 9
Conference LocationLorne, Victoria, Australia

Here we present a technique for automatic classification of seafloor data collected during the 2012 HABCAM-V4 cruises, a federally funded long term project part of the annual NOAA sea-scallop’s survey.

This project will analyse a unique data set that includes simultaneously collected data such as:
- Hi-resolution multi-beam (digital bathymetry and backscatter intensity)
- Seafloor stereo image data (e.g. species and substrate)
- Environmental parameters (e.g. temperature, salinity, water turbidity)

The analysis will be based on an unsupervised spatial clustering (K-means) of a combination of several predictors like morphological features (curvature, rugosity, fractal index, surface area) and backscatter intensity. The final results will be validated by analysing the identified classes with a randomly selected subset of underwater photographs for each class.

The seafloor classification map produced is then used as a preliminary "habitat classification" for further classification. It can be reused to define selection criteria for the underwater images used by automatic classifier or by manual image annotator tools.

Results from this project will also help to define new survey track-lines prior to and during HABCAM surveys.

URL for Proceedinghttp://geohab.org/conferences/2014-lorne-australia/