Inventor · disambiguated record
Hidefumi Ohsawa
Also filed as: OHSAWA HIDEFUMI
34 granted patents·1 pending application·1,200 citations·filing 1987–2000
98Inventor score
Files withCANON KK34
Top patents by PatentIndex Score
35 records- 0191US4975786AImage processing method and apparatus with error diffusion capabilityCANON KK·Filed 1988·Granted Dec 4, 1990·76 cites·32 claims
- 0289US5008950AImage processing method and apparatus for error-dispersion digitization without moire or spurious stripe formationCANON KK·Filed 1988·Granted Apr 16, 1991·65 cites·11 claims
- 0387US5790195AImage processing apparatusCANON KK·Filed 1994·Granted Aug 4, 1998·78 cites·14 claims
- 0487US4926268AImage processing apparatus which converts m-bit image data to n-bit (n>m) image dataCANON KK·Filed 1988·Granted May 15, 1990·56 cites·27 claims
- 0585US5818537AImage processing method and apparatus for converting between data coded in different formatsCANON KK·Filed 1996·Granted Oct 6, 1998·87 cites·40 claims
- 0685US4958238AImage processing method and apparatus with conditional correction of error dataCANON KK·Filed 1989·Granted Sep 18, 1990·48 cites·23 claims
- 0785US4878125AMethod and apparatus for image processing with fed-back error correctionCANON KK·Filed 1987·Granted Oct 31, 1989·79 cites·18 claims
- 0883US5883976ASelectively utilizing multiple encoding methodsCANON KK·Filed 1995·Granted Mar 16, 1999·80 cites·13 claims
- 0983US4876610AImage processing apparatus with binarization-error dispersalCANON KK·Filed 1987·Granted Oct 24, 1989·72 cites·37 claims
- 1081US5903366AColor image encoding methodCANON KK·Filed 1993·Granted May 11, 1999·49 cites·16 claims
- 1178US5126838AColor image processing with undercolor removal suitable for use in digital processingCANON KK·Filed 1991·Granted Jun 30, 1992·45 cites·55 claims
- 1277US5325448AImage treatment method and apparatus with error dispersion and controllable quantizationCANON KK·Filed 1992·Granted Jun 28, 1994·40 cites·1 claims
- 1377US4958218AImage processing method and apparatus with dot-processingCANON KK·Filed 1988·Granted Sep 18, 1990·31 cites·25 claims
- 1469US5136396AImage encoding methodCANON KK·Filed 1991·Granted Aug 4, 1992·33 cites·19 claims
- 1566US6285464B1Apparatus and method for producing a half-tone imageCANON KK·Filed 1992·Granted Sep 4, 2001·23 cites·21 claims
- 1666US5124811AImage encoding apparatusCANON KK·Filed 1989·Granted Jun 23, 1992·36 cites·11 claims
- 1765US5875039AImage processing method and apparatusCANON KK·Filed 1996·Granted Feb 23, 1999·38 cites·49 claims
- 1863US6266449B1Information processing apparatus and method which selectively controls data encoding by monitoring amount of encoded dataCANON KK·Filed 1996·Granted Jul 24, 2001·35 cites·7 claims
- 1959US5068746AImage processing apparatusCANON KK·Filed 1989·Granted Nov 26, 1991·26 cites·4 claims
- 2058US5331426AImage encoding methodCANON KK·Filed 1992·Granted Jul 19, 1994·15 cites·20 claims
- 2156US5991450AImage encoding and decoding apparatusCANON KK·Filed 1996·Granted Nov 23, 1999·20 cites·30 claims
- 2256US5917956AImage processing apparatus capable of removing an edge portion from a multi-level color signal based on a binary color signalCANON KK·Filed 1997·Granted Jun 29, 1999·16 cites·18 claims
- 2356US5844718AImage processing apparatus and method in which multi-level color signal with removed edge component is encodedCANON KK·Filed 1994·Granted Dec 1, 1998·13 cites·33 claims
- 2454US5898461AImage processing apparatusCANON KK·Filed 1997·Granted Apr 27, 1999·17 cites·7 claims
- 2554US5825934AAdaptive image coding method and apparatusCANON KK·Filed 1994·Granted Oct 20, 1998·14 cites·9 claims
- 2653US5732153AColor image processing apparatusCANON KK·Filed 1995·Granted Mar 24, 1998·17 cites·15 claims
- 2753US4907076AColor balance processing apparatus wherein color component signals are corrected through comparison with a reference valueCANON KK·Filed 1989·Granted Mar 6, 1990·11 cites·31 claims
- 2850US6026197ACoding method and apparatus thereforCANON KK·Filed 1996·Granted Feb 15, 2000·13 cites·14 claims
- 2947US5655032ACoding method and apparatus thereforCANON KK·Filed 1995·Granted Aug 5, 1997·14 cites·9 claims
- 3046US5282256ABinary image data coding method having the function of correcting errors derived from codingCANON KK·Filed 1992·Granted Jan 25, 1994·14 cites·6 claims
- 3143US6509900B1Image management apparatus and method, image management system, and storage mediumCANON KK·Filed 1999·Granted Jan 21, 2003·16 cites·23 claims
- 3243US5892546AEncoding apparatus and method for encoding a quantized difference between an input signal and a prediction valueCANON KK·Filed 1995·Granted Apr 6, 1999·11 cites·6 claims
- 3340US5900910ABlock matching method and apparatus which can use luminance/chrominance dataCANON KK·Filed 1995·Granted May 4, 1999·9 cites·13 claims
- 3437US2001019631A1Image processing apparatus and method, and storage mediumFiled 2000·Application pending·0 cites
- 3534US6415052B1Color image processing apparatusCANON KK·Filed 1995·Granted Jul 2, 2002·3 cites·65 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →