Method and system for storing and retrieving wide-area motion imagery frames as objects on an object storage device
A method, implemented by a computer system, and a system of organizing data of a wide area motion imagery frame and a method and a system of retrieving objects that match a user defined AOI from an image in a WAMI frame in a WAMI collection are described. The method of organizing includes dividing, by the computer system, an image of a WAMI frame into a plurality of tiles, each tile in the plurality of tiles comprising a plurality of pixels and having a pixel width and a pixel height; storing, by the computer system, the plurality of tiles as objects in an OSD, each object having an object identifier (OID); collecting, by the computer system, object identifiers (OIDs) of the objects; and storing, by the computer system, the OIDs in the OSD.
1. A method of retrieving data of an image of a wide area motion imagery, wherein the data is stored as a plurality of tiles stored as a plurality of first tile objects in an object storage device (OSD) each having a respective unique first object identifier (OID), wherein the data is divided from an image of a wide area motion image (WAMI), the image having a pixel height and a pixel width, each tile in the plurality of tiles comprising a plurality of pixels and having a pixel width and a pixel height, the WAMI image comprising a plurality of WAMI images that are captured sequentially in time using an image capture device and wherein the data is further divided into a plurality of reduced resolution dataset (R-set) tiles, the R-set having a pixel width and a pixel height that is smaller than the pixel width and the pixel height of the image, and each R-set tile in the R-set comprising a plurality of pixels and having a pixel width and a pixel height, and, the plurality of R-set tiles of the R-set of the image are stored as a plurality of second tile objects in the OSD, each of the plurality of second tile objects having a respective unique second OID, the first OIDs being stored in a first header of the image, the first header of the image containing information about the image, and the first header of the image being stored as a first header object in the OSD, the first header object having a first header OID, wherein the first header OID is stored separately from the OSD, in a reference file of a traditional file system or in a database, wherein the first header OID identifies the first header object; and
the method of retrieving being implemented by a computer system that includes one or more processors configured to execute computer program modules, the method comprising:
receiving a request defining an area of interest (AOI) from the image in a WAMI, wherein the AOI is wholly located in the image, and the AOI corresponding to one or more tile objects, the request including an origin and a pixel width and a pixel height of the AOI;
computing a top row and a left column number of a tile object that contains a top-left corner of the AOI and a bottom row and a right column number of a tile object that contains a bottom-right corner of the AOI;
computing for each column from the left column to the right column and for each row from the top row to the bottom row, a tile index of each tile in the one or more tiles of the AOI, in a tile locator list to obtain an object identifier (OID) corresponding to each tile; and send a request to the object storage device (OSD) containing a plurality of tile objects of the WAMI frame to retrieve a tile object associated with each of the one or more tiles of the AOI.
2. The method according to claim 1 , further comprising indicating a position of a tile in the plurality of tiles of the image and a size of the tile in the image based on metadata including a tile locator list.
3. The method according to claim 1 , wherein a pixel height and a pixel width of a tile in the plurality of tiles of the WAMI image is substantially the same as a pixel height and a pixel width of a tile in the plurality of R-set tiles of the R-set.
4. The method according to claim 1 , wherein the first header OID and the second header OID are stored in a reference record stored in computer memory prior to storing the first header OID.
5. The method according to claim 1 , wherein the first header OID and the second header OID are stored in a reference record stored in computer memory prior to storing the second header object identifier.
6. The method according to claim 1 , wherein the WAMI image comprises a plurality of smaller images captured by a plurality of image sensors of the image capture device substantially at the same time.
7. The method according to claim 1 , wherein the WAMI image is one image in a plurality of images captured by a plurality of image sensors of the image capture device substantially at the same time, the plurality of images being captured by the plurality of image sensors forming a single larger image.
8. The method according to claim 1 , wherein the OID is a globally unique object identifier.
9. The method according to claim 1 , wherein the OSD does not employ a file system architecture.