发明授权
- 专利标题: Real-time optical multiple object recognition and tracking system and method
- 专利标题(中): 实时光学多物体识别跟踪系统及方法
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申请号: US154718申请日: 1988-02-11
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公开(公告)号: US4924507A公开(公告)日: 1990-05-08
- 发明人: Tien-Hsin Chao , Hua-Kuang Liu
- 申请人: Tien-Hsin Chao , Hua-Kuang Liu
- 申请人地址: DC Washington
- 专利权人: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人地址: DC Washington
- 主分类号: G06K9/76
- IPC分类号: G06K9/76
摘要:
System for optically recognizing and tracking a plurality of objects within a field of vision. Laser (46) produces a coherent beam (48). Beam splitter (24) splits the beam into object (26) and reference (28) beams. Beam expanders (50) and collimators (52) transform the beams (26, 28) into coherent collimated light beams (26', 28'). A two-dimensional SLM (54), disposed in the object beam (26'), modulates the object beam with optical information as a function of signals from a first camera (16) which develops X and Y signals reflecting the contents of its field of vision. A hololens (38), positioned in the object beam (26') subsequent to the modulator (54), focuses the object beam at a plurality of focal points (42). A planar transparency-forming film (32), disposed with the focal points on an exposable surface, forms a multiple position interference filter (62) upon exposure of the surface and development processing of the film (32). A reflector (53) directing the reference beam (28') onto the film (32), exposes the surface, with images focused by the hololens (38), to form interference patterns on the surface. There is apparatus (16', 64) for sensing and indicating light passage through respective ones of the positions of the filter (62), whereby recognition of objects corresponding to respective ones of the positions of the filter (62) is affected. For tracking, apparatus (64) focuses light passing through the filter (62) onto a matrix of CCD's in a second camera (16') to form a two-dimensional display of the recognized objects.
公开/授权文献
- US5334561A High pressure injection nozzle 公开/授权日:1994-08-02