Inventor
SASANUMA NOBUATSU
JP66 patents
Patents
50 patentsUS6486974B1Nov 26, 2002
Image reading device
CANON KK48 citations96
US6094281AJul 25, 2000
Image reading device with offset faces for visible and non-visible light sensors
CANON KK62 citations96
US6034788AMar 7, 2000
Image forming apparatus and method
CANON KK55 citations96
US5859933AJan 12, 1999
Image forming apparatus
CANON KK65 citations96
US5856876AJan 5, 1999
Image processing apparatus and method with gradation characteristic adjustment
CANON KK64 citations96
US5696594ADec 9, 1997
Image forming method and apparatus for counterfeit protection controlling image synthesis in response to forming conditions
CANON KK52 citations96
US5583644ADec 10, 1996
System for correcting image density of an image forming system based on a detection result of a test image
CANON KK62 citations96
US5579090ANov 26, 1996
In an image processing system, an image processing apparatus and method for stabilizing output image quality by controlling image forming parameters
CANON KK83 citations96
US5557412ASep 17, 1996
Image forming method and apparatus for counterfeit protection using image synthesis accounting for forming conditions
CANON KK46 citations96
US5503904AApr 2, 1996
Invisible information recorded medium
CANON KK67 citations96
US6320605B1Nov 20, 2001
Image information processing apparatus and method
CANON KK32 citations93
US6184915B1Feb 6, 2001
Image processing apparatus and method
CANON KK27 citations93
US6172771B1Jan 9, 2001
Image forming system and calibration method for image forming conditions
CANON KK30 citations93
US6051826AApr 18, 2000
Photosensor with filter for cutting off the input of invisible information
CANON KK40 citations93
US6016206AJan 18, 2000
Image processing method and apparatus and image forming method and apparatus using the same
CANON KK17 citations93
US5763891AJun 9, 1998
Non-visualized information recording medium and apparatus for detecting the same
CANON KK34 citations93
US5724152AMar 3, 1998
Image reading apparatus and image processing apparatus for reading optical information of visible and non-visible light
CANON KK38 citations93
US5697012ADec 9, 1997
Method and apparatus for color image formation with gradation control capability
CANON KK26 citations93
US5650863AJul 22, 1997
Image reading and copying using plural illumination sources having different characteristics
CANON KK43 citations93
US5631723AMay 20, 1997
Image processing apparatus for determining whether an image contains a particular pattern using invisible light
CANON KK18 citations93
US5617187AApr 1, 1997
Image reading apparatus, copying apparatus, image processing apparatus, and image processing method
CANON KK24 citations93
US5572330ANov 5, 1996
Image processing apparatus and method
CANON KK20 citations93
US5566372AOct 15, 1996
Image forming apparatus and method having gradation control in a dense area in which gradation characteristics are non-linear
CANON KK52 citations93
US5481334AJan 2, 1996
Image processing apparatus having means for detecting non-visible light, and image processing method therefor
CANON KK28 citations93
US5471281ANov 28, 1995
Image reading apparatus and copying apparatus having means for radiating visible and non-visible light, image processing apparatus having means for discriminating a specific orginal and image processing method therefor
CANON KK39 citations93
US5414531AMay 9, 1995
Image forming control based on a stored operation condition
CANON KK20 citations93
US5296903AMar 22, 1994
Image forming apparatus having control based on detected toner charge and transfer efficiency
CANON KK29 citations93
US5258783ANov 2, 1993
Image processing method and apparatus with gamma-correction control
CANON KK39 citations93
US5253018AOct 12, 1993
Toner image density detecting mechanism for image forming apparatus
CANON KK35 citations93
US5162860ANov 10, 1992
Color image forming apparatus controlling glossiness of an image
CANON KK31 citations93
US6201616B1Mar 13, 2001
Method and apparatus for determining a predetermined pattern on an original based on visible and invisible information on the original
CANON KK27 citations92
US6078682AJun 20, 2000
Image processing apparatus and method, and image reading apparatus
CANON KK24 citations92
US5557416ASep 17, 1996
Image processing apparatus and method thereof for adding a predetermined pattern to an image
CANON KK19 citations92
US5294959AMar 15, 1994
Image forming apparatus with image density detection means for controlling image forming conditions
CANON KK48 citations92
US7529006B2May 5, 2009
Image processing method, image processing apparatus, storage medium, and program for calculating first and second graduation-correction characteristics, and for reducing hue variations of a secondary color
CANON KK18 citations84
US6535302B1Mar 18, 2003
Image processing apparatus and method
CANON KK14 citations84
US6057946AMay 2, 2000
Tonality correction system
CANON KK16 citations84
US7626728B2Dec 1, 2009
Method and apparatus for calcuating color differences on measured evaluation charts to evaluate color reproducibility considering image homogeneity
CANON KK17 citations83
US5262833ANov 16, 1993
Image forming apparatus and method
CANON KK19 citations82
US7068393B2Jun 27, 2006
Image ratio measuring method for image forming apparatus
CANON KK7 citations74
US7058215B2Jun 6, 2006
Data processing system, maintenance apparatus and image processing apparatus
CANON KK10 citations74
US6515769B1Feb 4, 2003
Image forming apparatus and method
CANON KK10 citations74
US6304341B1Oct 16, 2001
Image processing method and apparatus and image forming method and apparatus using the same
CANON KK5 citations74
US6190058B1Feb 20, 2001
Image processing method and apparatus and image forming method and apparatus using the same
CANON KK5 citations74
US6153879ANov 28, 2000
Invisible information detecting apparatus
CANON KK13 citations74
US6091512AJul 18, 2000
Image processing apparatus and method for improving image reproducibility
CANON KK13 citations74
US5937087AAug 10, 1999
Image processing apparatus and method thereof
CANON KK16 citations74
US5875036AFeb 23, 1999
Image processing apparatus which separates an image signal according to density level
CANON KK8 citations74
US5719681AFeb 17, 1998
Image processing apparatus and method thereof for adding a predetermined pattern to an image
CANON KK12 citations74
US5548378AAug 20, 1996
Image operating apparatus providing image stabilization control
CANON KK11 citations74
Showing the top 50 of 66 patents by PatentIndex Score.