Method and System for Real-time Automated Change Detection and Classification for Images
AssigneeThe Government of the United States, AS Represented By the Secretary of the Navy
InventorsMarlin L. Gendron, Maura C. Lohrenz, Lancelot M. Riedlinger, James A. Hammack, Charles B. Martin
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Abstract
A computer based system and method for real-time display of co-registered historical and current side scan sonar imagery during a side scan sonar survey. Embodiments also include modules for detection of clutter in the current imagery, identification of features, extraction of snippets, filtering based on predetermined size and shape parameters, and determination if a current feature is the same as a previously identified contact from historical imagery.
Claims16
A computer implemented method for determining if a contact in change detection side scan sonar imagery matches a previously found contact in the historical side scan sonar imagery of the same geospatial location, the historical side scan sonar imagery being in area-based tile format, the method comprising the steps of:
- for each contact in the change detection sonar imagery, finding contacts in the historical side scan sonar data in a region of uncertainty generated around the change detection sonar contact, and identifying the found historical contacts as a possible match;
- and
- if no historical contact falls within the region of uncertainty, returning all historical contacts that have with an uncertainty region that overlaps the uncertainty region of the change detection sonar contact, and identifying the returned historical contacts as possible matches.
A computer system operating software instructions for determining if a contact in change detection side scan sonar imagery matches a previously found contact in the historical side scan sonar imagery of the same geospatial location, the historical side scan sonar imagery being in area-based tile format, the software instructions:
- for each contact in the change detection sonar imagery, finding contacts in the historical side scan sonar data in a region of uncertainty generated around the change detection sonar contact, and identifying the found historical contacts as a possible match;
- and
- if no historical contact falls within the region of uncertainty, returning all historical contacts that have with an uncertainty region that overlaps the uncertainty region of the change detection sonar contact, and identifying the returned historical contacts as possible matches.
Dependencies are inferred from the claim text.