December 2005Introduction to Post-processing
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Software • Services • Systems Oceanic Imaging Consultants, Inc.Professional seafloor mapping software, createdby surveyors, for surveyors
December 2005Introduction to Post-processing
A Brief Introduction
Post-Processing
December 2005Introduction to Post-processing
What is “Post-processing”?• Technically, post-acquisition processing• GeoDAS can process in real-time but:
– Post-processing allow more flexibility and power in detecting and dealing with data noise and image artifacts.
– Post-processing tools allow you to review all your data, for creation of better mission products
December 2005Introduction to Post-processing
Why Do Post-processing?• Clean up noise in the data• Remove data artifacts• Make mission products,
– Maps– DEM’s– Target locations
December 2005Introduction to Post-processing
Typical sidescan artifacts
Beam Pattern Artifacts
Bottom-tracking Errors
Gain Changes
December 2005Introduction to Post-processing
Typical Bathymetry Artifacts
Depth outliers (noisy data)
December 2005Introduction to Post-processing
Typical navigation and heading
Noisy navigation and heading data
December 2005Introduction to Post-processing
OIC Options for Post-processing• GeoDAS-Desktop.
– Economic solution for data replay, navigation editing and production of simple mosaics.
• OICToolkit.– UNIX-based full-featured post-processing
package.• OICcleansweep.
– New, PC-based post-processing package for sidescan and bathymetry.
December 2005Introduction to Post-processing
Introducing OICcleansweep:Post-processing for Windows
December 2005Introduction to Post-processing
OICcleansweep• Retains many of the features of OICToolkit
– “swath-based” processing– “point & click” selection of data– Interactive editing of gains & bottom-tracking
• Adds new, more powerful features– Better data and swath bookkeeping– Navigation “wizard” to aid in sensor re-nav– “Quality” based filtering for bathymetry– More powerful mosaicking tool allows interactive
blending of multiple swaths– Target-marking tool allows clipping of full-resolution
GeoTIFFs from sidescan, and pasting them on mosaics
December 2005Introduction to Post-processing
Superimposition of EOID GeoTIFFTarget Snippets on Sidescan Mosaic
