Inventor
TACHIKAWA MICHIYOSHI
JP19 patents
⚠️ This page may combine multiple inventors who share the name “TACHIKAWA MICHIYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
18 patentsUS5751854AMay 12, 1998
Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system
RICOH KK181 citations98
US6272248B1Aug 7, 2001
Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system
RICOH KK113 citations97
US6115495ASep 5, 2000
Image extraction method and apparatus, and image recognition method and apparatus for extracting/recognizing specific images from input image signals
RICOH KK75 citations96
US5659628AAug 19, 1997
Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function
RICOH KK93 citations96
US5652803AJul 29, 1997
Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function
RICOH KK56 citations96
US5031225AJul 9, 1991
Character recognition method for recognizing character in an arbitrary rotation position
RICOH KK85 citations95
US6181820B1Jan 30, 2001
Image extraction method and apparatus and image recognition method and apparatus for extracting/recognizing specific images from input image signals
RICOH KK33 citations92
US5757957AMay 26, 1998
Apparatus and method for area separation for image, having improved separation accuracy
RICOH KK43 citations92
US5444518AAug 22, 1995
Image forming apparatus which adds identification information to recorded images to prevent forgery
RICOH KK47 citations92
US5048107ASep 10, 1991
Table region identification method
RICOH KK50 citations92
US4959870ASep 25, 1990
Character recognition apparatus having means for compressing feature data
RICOH KK52 citations92
US4903313AFeb 20, 1990
Character recognition method
RICOH KK51 citations92
US7140534B2Nov 28, 2006
Data recording medium, reading device, recording device, and methods thereof
RICOH KK20 citations91
US6256412B1Jul 3, 2001
Image recognition method and apparatus using image rotation information
RICOH KK21 citations90
US6226417B1May 1, 2001
Method and system for recognizing a rotated image pattern with reduced processing time and memory space
RICOH KK25 citations90
US5351313ASep 27, 1994
Binarization method
RICOH KK19 citations81
US5097520AMar 17, 1992
Method of obtaining optimum threshold values
RICOH KK18 citations81
US6862370B2Mar 1, 2005
Image detecting method, image detecting system, program, and recording medium for image detection
RICOH KK1 citations50