Inventor
SHIRASAWA HISAO
JP21 patents
⚠️ This page may combine multiple inventors who share the name “SHIRASAWA HISAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
13 patentsUS6226011B1May 1, 2001
Color conversion method for a color matching, a method for expanding a function of a program module and a color conversion method using the method for expanding a function of a program module
RICOH KK91 citations97
US6137595AOct 24, 2000
Color conversion processing method for color matching and a processor readable medium storing a program for implementing the color conversion processing method
RICOH KK59 citations96
US5299025AMar 29, 1994
Method of coding two-dimensional data by fast cosine transform and method of decoding compressed data by inverse fast cosine transform
RICOH KK85 citations96
US5689590ANov 18, 1997
Background noise removing apparatus and method applicable to color image processing apparatus
RICOH KK81 citations95
US5696842ADec 9, 1997
Image processing system for adaptive coding of color document images
RICOH KK114 citations94
US7564604B2Jul 21, 2009
Color signal processing and color profile creation for color image reproduction
RICOH KK28 citations92
US7072084B2Jul 4, 2006
Color converting device emphasizing a contrast of output color data corresponding to a black character
RICOH KK23 citations92
US7454528B2Nov 18, 2008
Image output apparatus using close range radio contact wherein radio contact element is attached to document on which an image is recorded
RICOH KK13 citations84
US7310167B2Dec 18, 2007
Color converting device emphasizing a contrast of output color data corresponding to a black character
RICOH KK14 citations84
US6839460B2Jan 4, 2005
Image processing method, image processing apparatus and recording medium
RICOH KK12 citations84
US6796629B2Sep 28, 2004
Color image processing apparatus, color image forming method, and recording medium
RICOH KK18 citations84
US7710600B2May 4, 2010
Image processing apparatus and method thereof
RICOH KK6 citations62
US7362896B2Apr 22, 2008
Image processing method, image processing apparatus and recording medium
RICOH KK2 citations62
RICOH CO LTD
3 patentsUS7864371B2Jan 4, 2011
Image processing apparatus, image processing method, and computer product
RICOH CO LTD12 citations84
US8045222B2Oct 25, 2011
Image processing method, image processing apparatus, computer program product, and recording medium for image processing
RICOH CO LTD5 citations62
US7962658B2Jun 14, 2011
Image output apparatus using close range radio contact wherein radio contact element is attached to document on which an image is recorded
RICOH CO LTD2 citations62