发明名称 |
SIGNAL PROCESSING FOR AUTONOMOUS ACQUISITION OF OBJECTS IN CLUTTERED BACKGROUND |
摘要 |
A method and apparatus are disclosed for detecting moving objects silhouetted against background clutter. A correlation subsystem 12 is used to register the background of a current image frame (framestore 1) with an image frame taken two time periods earlier (framestore 3). A first difference image is generated by subtracting the registered images, with the first difference image being filtered by low pass filter 34 and thresholded by a three level segmenter 36. A second difference image is likewise generated between the current image frame and another image frame taken at a different subsequent time period. This second difference image is likewise filtered and thresholded. The two difference images are logically ANDed together by gate 39 whose output is connected to a formatter, sorter and feature extractor 40. Track files are generated in CPU 16 for comparing subsequently extracted image features with previously stored extracted features. |
申请公布号 |
AU619611(B2) |
申请公布日期 |
1992.01.30 |
申请号 |
AU19890044005 |
申请日期 |
1989.07.03 |
申请人 |
HUGHES AIRCRAFT COMPANY |
发明人 |
THOMAS K. LO;JACK M. SACKS;NAM D. BANH |
分类号 |
G01S3/782;G01S3/786;G06T7/00;G06T7/20 |
主分类号 |
G01S3/782 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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