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1. 发明申请

WO1990001706A2 SIGNAL PROCESSING FOR AUTONOMOUS ACQUISITION OF OBJECTS IN CLUTTERED BACKGROUND 审中-公开
标题翻译：信号处理自动采集背景中的物体
公开(公告)号：WO1990001706A2
公开(公告)日：1990-02-22
申请号：PCT/US1989002877
申请日：1989-07-03
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , LO, THomas, K. , SACKS, Jack, M. , BANH, Nam, D.
IPC分类号： G01S03/786
CPC分类号： G01S3/7865 , G06T7/254
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.
摘要翻译：已经开发了用于检测具有与寄生背景回波相关的限定轮廓的移动物体的方法和设备。使用相关子系统（12）来记录当前图像（图像存储器1）的背景与两个较早时间段（图像存储器3）拍摄的图像。通过减去所记录的图像来创建第一差异图像，第一差异图像由低通滤波器（34）滤波并且其由三级分割器（36）设置的阈值。在当前图像和在不同的较晚时间段拍摄的另一图像之间以相同方式创建第二差异图像。我们以相同的方式过滤并设置第二个差异图像的阈值。两个差分图像通过与门（39）在逻辑上组合，其输出连接到格式器，分类器和特征提取器（40）。在CPU（16）中创建跟踪文件，以将随后提取的图像的特征与先前存储的提取的特征进行比较。

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