Representation of activity in images using geospatial temporal graphs
| DWPI Title: Computing device for generating geospatial temporal (GST) graphs for representing activity of building , has processor to provide GST to search system where GST searchable is in response to receipt of query |
| Abstract: Various technologies pertaining to modeling patterns of activity observed in remote sensing images using geospatial-temporal graphs are described herein. Graphs are constructed by representing objects in remote sensing images as nodes, and connecting nodes with undirected edges representing either distance or adjacency relationships between objects and directed edges representing changes in time. Activity patterns may be discerned from the graphs by coding nodes representing persistent objects like buildings differently from nodes representing ephemeral objects like vehicles, and examining the geospatial-temporal relationships of ephemeral nodes within the graph. |
| Use: Computing device for generating geospatial temporal (GST) graphs for representing activity of building such as church, vehicle such as car, roads, trees, grass, shrubs, other pavement, bare earth, and water. |
| Advantage: The GST graph is used to quickly and efficiently search for signs of activity of non-persistent objects in an image dataset. BY applying morphological erosion to the larger region effectively eliminates the sidewalk filaments while retaining the basic shape of the individual parking lot regions. The incorporating activity information into the graph itself allows a user to search very large image datasets for specific sorts of activities of interest, without having to examine multiple image time slices manually. The activity information allows a user to identify churches by identifying parking lots with an increase in cars on Sundays. |
| Novelty: The device has a processor for assigning classifications to respective portions of the remote sensing images (802) of a scene captured at the first and second times that is subsequent to the first time. Each undirected edges (734,736,740,742,809,811) in the undirected edges couples a respective pair of the nodes (728, 730,732), and the undirected edge assigned data is indicative of a symmetric relationship between objects in the scene represented by nodes in the pair of nodes. The GST is provided to a search system and the GST searchable in response to receipt of a query. |
| Filed: 9/8/2015 |
| Application Number: US14848165A |
| Tech ID: SD 13063.0 |
| 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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