Identifying spatial locations of events within video image data
An invention for identifying a spatial location of an event within video image data is provided. Disclosed are embodiments for detecting an object and obtaining trajectory data of a trajectory of the object within the video image data from a sensor device; converting the trajectory data into a contour-coded compressed image; generating, based on the trajectory data, a searchable code that contains a set of locations traversed by the trajectory of the object within the video image; associating the searchable code with the contour-coded compressed image in a database; and returning, in response to a query having a selected location that corresponds a location of the set of locations in the searchable code, an image of the trajectory data corresponding to the object based on the contour-coded compressed image in the database.
1. A method for identifying a spatial location of an event within video image data comprising:
generating, by at least one computer device, based on trajectory data of a trajectory of an object within video image data, a searchable code that contains a set of locations traversed by the trajectory of the object within the video image, wherein the generating further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the searchable code that corresponds to the pixel region;
converting, by the at least one computer device, the trajectory data into a contour-coded compressed image; and
returning from a database, in response to a query having a selected location that corresponds a location of the set of locations in the searchable code, an image of the trajectory data corresponding to the object based on the contour-coded compressed image in the database.
2. The method according to claim 1 , further comprising searching the database to identify a spatial location of the event within the video image data.
3. The method according to claim 2 , the searching comprising:
converting the area of interest to a lossy query code; and
comparing the lossy query code to the searchable code of the trajectory data within the video image data.
4. The method according to claim 3 , further comprising:
decompressing the contour-coded compressed image corresponding to the lossy query code based on the comparing; and
plotting the trajectory of the trajectory data within the video image data from the contour-coded compressed image.
5. The method according to claim 1 , wherein the converting further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the contour-coded compressed image that corresponds to the pixel region.
6. The method according to claim 5 , the converting further comprising:
determining, for each pixel region that the trajectory intersects, a direction of the trajectory from a location in the video image associated with the pixel region; and
assigning a value that indicates the direction of the trajectory from the associated location to the memory location in the contour-coded compressed image that corresponds to each pixel region that the trajectory intersects.
7. A system for identifying a spatial location of an event within video image data comprising:
at least one processing device;
memory operably associated with the at least one processing device; and
a spatial representation tool storable in memory and executable by the at least one processing device, the spatial representation tool causing the at least one processing device to:
generate, based on trajectory data of a trajectory of an object within video image data, a searchable code that contains a set of locations traversed by the trajectory of the object within the video image, wherein the generating further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the searchable code that corresponds to the pixel region;
convert the trajectory data into a contour-coded compressed image; and
return from a database, in response to a query having a selected location that corresponds a location of the set of locations in the searchable code, an image of the trajectory data corresponding to the object based on the contour-coded compressed image in the database.
8. The system of claim 7 , the spatial representation tool further causing the at least one processing device to search the database to identify a spatial location of the event within the video image data.
9. The system of claim 8 , the searching comprising:
converting the area of interest to a lossy query code; and
comparing the lossy query code to the searchable code of the trajectory data within the video image data.
10. The spatial representation tool according to claim 9 further causing the at least one processing device to:
decompress the contour-coded compressed image corresponding to the lossy query code based on the comparing; and
plot the trajectory of the trajectory data within the video image data from the contour-coded compressed image.
11. The system according to claim 7 , wherein the converting further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the contour-coded compressed image that corresponds to the pixel region.
12. The system according to claim 11 , the converting further comprising:
determining, for each pixel region that the trajectory intersects, a direction of the trajectory from a location in the video image associated with the pixel region; and
assigning a value that indicates the direction of the trajectory from the associated location to the memory location in the contour-coded compressed image that corresponds to each pixel region that the trajectory intersects.
13. A computer-readable storage device storing computer instructions, which when executed, enables a computer system to identify a spatial location of an event within video image data, the computer instructions comprising:
generating, based on trajectory data of a trajectory of an object within video image data, a searchable code that contains a set of locations traversed by the trajectory of the object within the video image, wherein the generating further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the searchable code that corresponds to the pixel region;
converting the trajectory data into a contour-coded compressed image; and
returning from a database, in response to a query having a selected location that corresponds a location of the set of locations in the searchable code, an image of the trajectory data corresponding to the object based on the contour-coded compressed image in the database.
14. The computer-readable storage device according to claim 13 , further comprising computer instructions for searching the database to identify a spatial location of the event within the video image data, the searching comprising:
converting the area of interest to a lossy query code; and
comparing the lossy query code to the searchable code of the trajectory data within the video image data.
15. The computer-readable storage device according to claim 14 , further comprising computer instructions for:
decompressing the contour-coded compressed image corresponding to the lossy query code based on the comparing; and
plotting the trajectory of the trajectory data within the video image data from the contour-coded compressed image.
16. The computer readable storage device according to claim 13 , wherein the converting further comprises:
dividing the video image data into a plurality of pixel regions;
determining, for each pixel region in the plurality of pixel regions, whether the trajectory intersects any pixel in the pixel region; and
indicating, for each pixel region, a result of the determining in a memory location in the contour-coded compressed image that corresponds to the pixel region.
17. The computer readable storage device according to claim 16 , the converting further comprising:
determining, for each pixel region that the trajectory intersects, a direction of the trajectory from a location in the video image associated with the pixel region; and
assigning a value that indicates the direction of the trajectory from the associated location to the memory location in the contour-coded compressed image that corresponds to each pixel region that the trajectory intersects.