Parallel Optical Walsh Expansion in a Pattern Recognition Preprocessor Using Planar Microlens Array
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概要
- 論文の詳細を見る
We have developed a parallel optical preprocessor for a pattern recognition system using a planar microlens array and a Walsh orthogonal expansion spatial filter. We experimentally demonstrated the parallel optical Walsh expansion of multiple images made by the planar microlens array with good accuracy, which assures 99% recognition of simple numeral characters in the system. In order to enlarge the tolerance of the recognition rate against the deformation of input patterns, we propose a novel selection method of Walsh expansion coefficients. From the computer simulation, we confirmed that 5% transverse shifts and 20° rotation of input patterns are allowable with the optimization of the spatial filter using this method.
- 社団法人応用物理学会の論文
- 1992-05-30
著者
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Baba Toshihiko
Tokyo Institute of Technology, Research Laboratory of Precision Machinery and Electronics
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Iga Kenichi
Tokyo Institute Of Technology
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Iga Kenichi
Tokyo Institute Of Technology Precision And Intelligence Lab.
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MURASHIGE Kimio
Tokyo Institute of Technology, Precision and Intelligence Lab.
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AKIBA Atsushi
Tokyo Institute of Technology, Precision and Intelligence Lab.
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Baba Toshihiko
Tokyo Institute Of Technology Precision And Intelligence Lab.
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Akiba Atsushi
Tokyo Institute Of Technology Precision And Intelligence Lab.:(present Address) Nippon Sheet Glass C
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Murashige Kimio
Tokyo Institute Of Technology Precision And Intelligence Lab.
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