Identifying spatial locations of events within video image data

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;

converting, by the at least one computer device, the trajectory data into a contour-coded compressed image, 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; 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 , 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.

6. The method according to claim 1 , 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.

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;

convert the trajectory data into a contour-coded compressed image, 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; 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 , 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.

12. The system according to claim 7 , 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.

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;

converting the trajectory data into a contour-coded compressed image, 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; 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 15 , 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.

17. The computer readable storage device according to claim 13 , 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.