Superpixel edges for boundary detection
| DWPI Title: Computing system for identifying edges in radar image, has processor for identifying superpixels as having contrasting radar-reflecting properties and labeling edge as external edge in response to determining properties are dissimilar |
| Abstract: Various embodiments presented herein relate to identifying one or more edges in a synthetic aperture radar (SAR) image comprising a plurality of superpixels. Superpixels sharing an edge (or boundary) can be identified and one or more properties of the shared superpixels can be compared to determine whether the superpixels form the same or two different features. Where the superpixels form the same feature the edge is identified as an internal edge. Where the superpixels form two different features, the edge is identified as an external edge. Based upon classification of the superpixels, the external edge can be further determined to form part of a roof, wall, etc. The superpixels can be formed from a speckle-reduced SAR image product formed from a registered stack of SAR images, which is further segmented into a plurality of superpixels. The edge identification process is applied to the SAR image comprising the superpixels and edges. |
| Use: Computing system for identifying edges in a radar image i.e. synthetic aperture radar image (claimed). |
| Advantage: The system facilitates SA-ML imaging to reduce spatial resolution to reduce speckle while MCCD imaging and MRCS imaging can average values over time rather than over space, thus preserving spatial resolution while speckle is reduced. The system enables quick-shift to avoid computationally expensive gradient calculations and achieve a constrained locally optimal solution by searching for local parent pixels with higher density. |
| Novelty: The system has a processor (151) for comparing a first property of a first superpixel (176) assigned to a pixel in an image and a second property of a second superpixel assigned to the pixel. The processor identifies the superpixels as having similar radar-reflecting properties and labeling a first edge as an internal edge in response to determining first and second properties are similar. The processor identifies the superpixels as having contrasting radar-reflecting properties and labeling the edge as an external edge in response to determining the first and second properties are dissimilar. |
| Filed: 10/29/2015 |
| Application Number: US14927066A |
| Tech ID: SD 13114.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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