05093869 is referenced by 45 patents and cites 10 patents.

Image data is processed by a low level feature detection processor that extracts low level features from an image. This is accomplished by converting a matrix of image data into a matrix of orthogonal icons that symbolically represent the image scene using a predetermined set of attributes. The orthogonal icons serve as the basis of processing by means of a high level graph matching processor which employs symbolic scene segmentation, description, and recognition processing that is performed subsequent to the low level feature detection. This processing generates attribute graphs representative of target objects present in the image scene. High level graph matching compares predetermined attributed reference graphs to the sensed graphs to produce a best common subgraph between the two based on the degree of similarity between the two graphs. The high level graph matching generates a recognition decision based on the value of the degree of similarity and a predetermined threshold. The output of the high level graph matching provides data from which a target aimpoint is determined, and this aimpoint is coupled as an input to a missile guidance system that tracks identified targets.

Title
Pattern recognition apparatus utilizing area linking and region growth techniques
Application Number
7/633833
Publication Number
5093869
Application Date
December 26, 1990
Publication Date
March 3, 1992
Inventor
Brian J Birdsall
Canoga Park
CA, US
Bruce A Berger
Simi Valley
CA, US
Craig C Reinhart
Moorpark
CA, US
Walter W Tackett
Canoga Park
CA, US
Michele K Daniels
Northridge
CA, US
Victoria Gor
Canoga Park
CA, US
Jerry A Burman
Westlake Village
CA, US
James F Alves
Calabasas
CA, US
Agent
W K Denson Low
R M Heald
C D Brown
Assignee
Hughes Aircraft Company
CA, US
IPC
G06K 9/48
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