Title:
【発明の名称】座標変換機能を有する光学的パターン認識装置
Document Type and Number:
Japanese Patent JP3062664
Kind Code:
B2
Abstract:
PURPOSE:To achieve pattern recognition accurately and at a high speed even if a size or a rotary angle of an object to be recognized changes in various manners. CONSTITUTION:After a reference image and a newly input image to be correlated are displayed at an electrical writing-type space light modulator 3 for input image and then are displayed at a light-writing-type space light modulator 65 for shift steadiness after Fourier transformation, a coordinate transformation image where they are transformed to a desired coordinate system using a coordinate transformation optical filter array 44 and a coordinate transformation lens array 47 is obtained. The intensity distribution image is displayed at a light-writing-type space light modulator 13 for coordinate transformation and a Fourier transformation intensity distribution image is displayed at a light-writing-type space light modulator 15 for Fourier transformation after Fourier transformation, and then a correlation coefficient between a coordinate transformation image of the reference image and that of the image to be correlated is obtained after Fourier transformation is performed again. A type of the reference image and the coordinate transformation can be changed easily and at a high speed and at the same time a pattern recognition which is steady even for shifting of the image to be correlated can be performed.
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Inventors:
Yasuyuki Mitsuoka
Tadao Iwaki
Toshiharu Takei
Yasuhiro Takemura
Tadao Iwaki
Toshiharu Takei
Yasuhiro Takemura
Application Number:
JP12935691A
Publication Date:
July 12, 2000
Filing Date:
May 31, 1991
Export Citation:
Assignee:
Seiko Instruments Inc.
Sumitomo Osaka Cement Co., Ltd.
Sumitomo Osaka Cement Co., Ltd.
International Classes:
G01N21/88; G01N21/93; G01B11/24; G02B27/46; G06E3/00; G06G7/19; G06K9/74; G06T7/00; H04N7/18; (IPC1-7): G01B11/24
Domestic Patent References:
| JP1300382A | ||||
| JP2198414A |
Attorney, Agent or Firm:
Keinosuke Hayashi