Inventor · disambiguated record
Nobuatsu Sasanuma
Also filed as: SASANUMA NOBUATSU
66 granted patents·1,618 citations·filing 1991–2007
99Inventor score
Top patents by PatentIndex Score
66 records- 0192US7626728B2Method and apparatus for calcuating color differences on measured evaluation charts to evaluate color reproducibility considering image homogeneityCANON KK·Filed 2006·Granted Dec 1, 2009·17 cites·11 claims
- 0292US5294959AImage forming apparatus with image density detection means for controlling image forming conditionsCANON KK·Filed 1992·Granted Mar 15, 1994·48 cites·39 claims
- 0390US5566372AImage forming apparatus and method having gradation control in a dense area in which gradation characteristics are non-linearCANON KK·Filed 1995·Granted Oct 15, 1996·52 cites·22 claims
- 0489US5503904AInvisible information recorded mediumCANON KK·Filed 1994·Granted Apr 2, 1996·67 cites·17 claims
- 0588US6486974B1Image reading deviceCANON KK·Filed 2000·Granted Nov 26, 2002·48 cites·2 claims
- 0688US5253018AToner image density detecting mechanism for image forming apparatusCANON KK·Filed 1992·Granted Oct 12, 1993·35 cites·9 claims
- 0784US5579090AIn an image processing system, an image processing apparatus and method for stabilizing output image quality by controlling image forming parametersCANON KK·Filed 1995·Granted Nov 26, 1996·83 cites·13 claims
- 0884US5296903AImage forming apparatus having control based on detected toner charge and transfer efficiencyCANON KK·Filed 1992·Granted Mar 22, 1994·29 cites·21 claims
- 0983US5583644ASystem for correcting image density of an image forming system based on a detection result of a test imageCANON KK·Filed 1993·Granted Dec 10, 1996·62 cites·13 claims
- 1082US5557412AImage forming method and apparatus for counterfeit protection using image synthesis accounting for forming conditionsCANON KK·Filed 1993·Granted Sep 17, 1996·46 cites·18 claims
- 1181US6094281AImage reading device with offset faces for visible and non-visible light sensorsCANON KK·Filed 1997·Granted Jul 25, 2000·62 cites·19 claims
- 1280US5859933AImage forming apparatusCANON KK·Filed 1996·Granted Jan 12, 1999·65 cites·28 claims
- 1380US5856876AImage processing apparatus and method with gradation characteristic adjustmentCANON KK·Filed 1996·Granted Jan 5, 1999·64 cites·23 claims
- 1479US7633648B2Method and apparatus for calculating distances and reflection differences between measurement points on printed matter to evaluate image qualityCANON KK·Filed 2006·Granted Dec 15, 2009·6 cites·7 claims
- 1579US7529006B2Image 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 colorCANON KK·Filed 2003·Granted May 5, 2009·18 cites·7 claims
- 1679US5696594AImage forming method and apparatus for counterfeit protection controlling image synthesis in response to forming conditionsCANON KK·Filed 1996·Granted Dec 9, 1997·52 cites·33 claims
- 1779US5471281AImage 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 thereforCANON KK·Filed 1993·Granted Nov 28, 1995·39 cites·28 claims
- 1878US6034788AImage forming apparatus and methodCANON KK·Filed 1997·Granted Mar 7, 2000·55 cites·14 claims
- 1978US5617187AImage reading apparatus, copying apparatus, image processing apparatus, and image processing methodCANON KK·Filed 1995·Granted Apr 1, 1997·24 cites·18 claims
- 2076US5697012AMethod and apparatus for color image formation with gradation control capabilityCANON KK·Filed 1995·Granted Dec 9, 1997·26 cites·27 claims
- 2176US5258783AImage processing method and apparatus with gamma-correction controlCANON KK·Filed 1992·Granted Nov 2, 1993·39 cites·16 claims
- 2275US6320605B1Image information processing apparatus and methodCANON KK·Filed 1998·Granted Nov 20, 2001·32 cites·25 claims
- 2375US5724152AImage reading apparatus and image processing apparatus for reading optical information of visible and non-visible lightCANON KK·Filed 1993·Granted Mar 3, 1998·38 cites·26 claims
- 2474US5414531AImage forming control based on a stored operation conditionCANON KK·Filed 1992·Granted May 9, 1995·20 cites·26 claims
- 2573US5481334AImage processing apparatus having means for detecting non-visible light, and image processing method thereforCANON KK·Filed 1993·Granted Jan 2, 1996·28 cites·22 claims
- 2673US5262833AImage forming apparatus and methodCANON KK·Filed 1992·Granted Nov 16, 1993·19 cites·14 claims
- 2772US7058215B2Data processing system, maintenance apparatus and image processing apparatusCANON KK·Filed 2001·Granted Jun 6, 2006·10 cites·9 claims
- 2872US6051826APhotosensor with filter for cutting off the input of invisible informationCANON KK·Filed 1997·Granted Apr 18, 2000·40 cites·10 claims
- 2972US5650863AImage reading and copying using plural illumination sources having different characteristicsCANON KK·Filed 1995·Granted Jul 22, 1997·43 cites·52 claims
- 3072US5162860AColor image forming apparatus controlling glossiness of an imageCANON KK·Filed 1991·Granted Nov 10, 1992·31 cites·15 claims
- 3167US7068393B2Image ratio measuring method for image forming apparatusCANON KK·Filed 2001·Granted Jun 27, 2006·7 cites·17 claims
- 3267US5763891ANon-visualized information recording medium and apparatus for detecting the sameCANON KK·Filed 1997·Granted Jun 9, 1998·34 cites·23 claims
- 3366US5319433AElectrophotographing apparatus for forming color imageCANON KK·Filed 1993·Granted Jun 7, 1994·15 cites·9 claims
- 3465US7676080B2Method of creating color chart for color evaluation, and information processing apparatus thereofCANON KK·Filed 2007·Granted Mar 9, 2010·4 cites·10 claims
- 3565US6172771B1Image forming system and calibration method for image forming conditionsCANON KK·Filed 1998·Granted Jan 9, 2001·30 cites·12 claims
- 3665US5557416AImage processing apparatus and method thereof for adding a predetermined pattern to an imageCANON KK·Filed 1993·Granted Sep 17, 1996·19 cites·15 claims
- 3764US6201616B1Method and apparatus for determining a predetermined pattern on an original based on visible and invisible information on the originalCANON KK·Filed 1997·Granted Mar 13, 2001·27 cites·87 claims
- 3863US6184915B1Image processing apparatus and methodCANON KK·Filed 1997·Granted Feb 6, 2001·27 cites·25 claims
- 3961US8174536B2Color difference display control apparatus, color difference display control method, and control programITAGAKI TOMOHISA·Filed 2007·Granted May 8, 2012·1 cites·19 claims
- 4060US5481340AImage forming apparatusCANON KK·Filed 1994·Granted Jan 2, 1996·12 cites·27 claims
- 4159US6016206AImage processing method and apparatus and image forming method and apparatus using the sameCANON KK·Filed 1995·Granted Jan 18, 2000·17 cites·17 claims
- 4258US5631723AImage processing apparatus for determining whether an image contains a particular pattern using invisible lightCANON KK·Filed 1996·Granted May 20, 1997·18 cites·37 claims
- 4358US5548378AImage operating apparatus providing image stabilization controlCANON KK·Filed 1993·Granted Aug 20, 1996·11 cites·35 claims
- 4457US7274490B2Image forming apparatus with control of maximum output of colorantCANON KK·Filed 2003·Granted Sep 25, 2007·2 cites·8 claims
- 4557US5572330AImage processing apparatus and methodCANON KK·Filed 1995·Granted Nov 5, 1996·20 cites·20 claims
- 4656US5327209AColor image forming apparatusCANON KK·Filed 1993·Granted Jul 5, 1994·10 cites·12 claims
- 4755US6078682AImage processing apparatus and method, and image reading apparatusCANON KK·Filed 1996·Granted Jun 20, 2000·24 cites·24 claims
- 4854US6153879AInvisible information detecting apparatusCANON KK·Filed 1996·Granted Nov 28, 2000·13 cites·12 claims
- 4952US6057946ATonality correction systemCANON KK·Filed 1997·Granted May 2, 2000·16 cites·30 claims
- 5052US5937087AImage processing apparatus and method thereofCANON KK·Filed 1995·Granted Aug 10, 1999·16 cites·11 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
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