Seabed Classification From Multispectral Multibeam Data

Multispectral Acoustic Backscatter from Multibeam, Improved Classification Potential

Most multibeams today provide a measure of the received seabed backscatter intensity. With proper radiometric and geometric reduction, the seabed backscatter strength and its angular variation may be derived, which can then be used to attempt seabed classification. Most multibeams, however, are monochromatic in the sense that they transmit using a single center frequency (even if with some puls...

Hierarchical Classification of Multitemporal/Multispectral Scanner Data

Most techniques for computer classification of multispectral scanner data involve a "single-stage" approach in which every pixel in the data is classified in a single step, using a single set of training statistics and a single set of wave length bands. Hierarchical classifiers, on the other hand, involve a sequence of classification steps, each of which can involve a different wavelength band ...

Classification of High Dimensional Multispectral Data

New sensor technology has made it possible to gather multi!;pectral images in hondreds and potentially thousands of spectral bands, whereas current sensors typically gather images in 12 or fewer bands. This tremendous increase in spectral resolution should provide a wealth of detailed information, but the techniques used to analyze lower di:mensional data often perform poorly on high dimensiona...

Spatial Prediction of Coastal Bathymetry Based on Multispectral Satellite Imagery and Multibeam Data

The coastal shallow water zone can be a challenging and costly environment in which to acquire bathymetry and other oceanographic data using traditional survey methods. Much of the coastal shallow water zone worldwide remains unmapped using recent techniques and is, therefore, poorly understood. Optical satellite imagery is proving to be a useful tool in predicting water depth in coastal zones,...

Predictive modelling of seabed sediment parameters using multibeam acoustic data: a case study on the Carnarvon Shelf, Western Australia