Inventor · disambiguated record
Ryohei Kumagai
Also filed as: KUMAGAI RYOHEI
52 granted patents·1,124 citations·filing 1980–1995
99Inventor score
Top patents by PatentIndex Score
52 records- 0198US5450291ALighting system for cameraEZEL INC·Filed 1992·Granted Sep 12, 1995·123 cites·10 claims
- 0295US5007098AVectorizing methodEZEL INC·Filed 1988·Granted Apr 9, 1991·201 cites·39 claims
- 0381US4325191ACoffee roasterADVANCE COMPANY LIMITED·Filed 1980·Granted Apr 20, 1982·70 cites·4 claims
- 0472US5315664ANumber plate recognition systemEZEL INC·Filed 1993·Granted May 24, 1994·63 cites·5 claims
- 0571US5201013ADither processing methodEZEL INC·Filed 1990·Granted Apr 6, 1993·25 cites·10 claims
- 0670US5438634ADither processing methodEZEL INC·Filed 1994·Granted Aug 1, 1995·23 cites·7 claims
- 0768US5159646AMethod and system for verifying a seal against a stored imageEZEL INC·Filed 1991·Granted Oct 27, 1992·31 cites·4 claims
- 0867US5490225AMethod and system for comparing two images by making an initial rough judgementEZEL INC·Filed 1994·Granted Feb 6, 1996·28 cites·11 claims
- 0967US5315669ADither processing methodEZEL INC·Filed 1992·Granted May 24, 1994·20 cites·8 claims
- 1064US5159645AMethod for recognizing concavities in an image subject to character recognitionEZEL INC·Filed 1991·Granted Oct 27, 1992·44 cites·7 claims
- 1162US5463717AInductively coupled neural networkYOZAN INC·Filed 1990·Granted Oct 31, 1995·18 cites·5 claims
- 1259US5283866AImage processing systemEZEL INC·Filed 1990·Granted Feb 1, 1994·27 cites·37 claims
- 1358US5231678AConfiguration recognition system calculating a three-dimensional distance to an object by detecting cross points projected on the objectEZEL INC·Filed 1992·Granted Jul 27, 1993·33 cites·7 claims
- 1458US5151794AImage processing methodEZEL INC·Filed 1989·Granted Sep 29, 1992·11 cites·10 claims
- 1557US5664069AData processing systemYOZAN INC·Filed 1995·Granted Sep 2, 1997·20 cites·8 claims
- 1657US5204617ALiquid crystal panel inspection methodEZEL INC·Filed 1991·Granted Apr 20, 1993·20 cites·9 claims
- 1756US5040230AAssociative pattern conversion system and adaptation method thereofEZEL INC·Filed 1989·Granted Aug 13, 1991·20 cites·10 claims
- 1854US5414666AMemory control deviceEZEL INC·Filed 1992·Granted May 9, 1995·25 cites·22 claims
- 1952US5195171AData processing systemYOZAN INC·Filed 1991·Granted Mar 16, 1993·15 cites·3 claims
- 2051US5367580AMethod and system for establishing a coincidence between two imagesEZEL INC·Filed 1993·Granted Nov 22, 1994·12 cites·5 claims
- 2150US5164997AMethod and apparatus for aligning images using pixels of closed contoursEZEL INC·Filed 1991·Granted Nov 17, 1992·24 cites·12 claims
- 2248US5267324AImage comparison methodEZEL INC·Filed 1992·Granted Nov 30, 1993·35 cites·11 claims
- 2348US5220647AImage processing methodEZEL INC·Filed 1988·Granted Jun 15, 1993·17 cites·10 claims
- 2447US5553170AHigh speed image processing system having a preparation portion and a converting portion generating a processed image based on the preparation portionEZEL INC·Filed 1994·Granted Sep 3, 1996·15 cites·5 claims
- 2545US5553196AMethod for processing data using a neural network having a number of layers equal to an abstraction degree of the pattern to be processedYOZAN INC·Filed 1995·Granted Sep 3, 1996·24 cites·9 claims
- 2644US5228097AMethod for registering image dataEZEL INC·Filed 1992·Granted Jul 13, 1993·13 cites·21 claims
- 2744US5034992AImage processing methodEZEL INC·Filed 1989·Granted Jul 23, 1991·14 cites·11 claims
- 2843US5086482AImage processing methodEZEL INC·Filed 1989·Granted Feb 4, 1992·13 cites·7 claims
- 2942US5361328AData processing system using a neural networkEZEL INC·Filed 1993·Granted Nov 1, 1994·8 cites·6 claims
- 3041US5394481ALiquid crystal panel inspection methodEZEL INC·Filed 1992·Granted Feb 28, 1995·12 cites·7 claims
- 3141US5175593AFingerprint photographing systemEZEL INC·Filed 1991·Granted Dec 29, 1992·23 cites·5 claims
- 3240US5684897AMethod for quantizing color image data by minimizing least squares error of binary codingEZEL INC·Filed 1995·Granted Nov 4, 1997·10 cites·3 claims
- 3340US5075872AMethod for converting a multiple-density image into a binary density imageEZEL INC·Filed 1990·Granted Dec 24, 1991·13 cites·2 claims
- 3436US5394510ANeural network-type data processing system recognizing a predetermined shape using inhibitory connectionsYOZAN INC·Filed 1993·Granted Feb 28, 1995·7 cites·12 claims
- 3536US5384866AThinning method of an imageEZEL INC·Filed 1993·Granted Jan 24, 1995·7 cites·1 claims
- 3635US5633988AAdaptation method for data processing systemYOZAN INC·Filed 1992·Granted May 27, 1997·4 cites·21 claims
- 3735US5438682AData processing system for rewriting parallel processor output data using a sequential processorYOZAN INC·Filed 1994·Granted Aug 1, 1995·8 cites·6 claims
- 3835US5185816AMethod of selecting characeteristics data for a data processing systemYOZAN INC·Filed 1990·Granted Feb 9, 1993·8 cites·1 claims
- 3935US5077808AMethod for processing an image by histogram alterationEZEL INC·Filed 1989·Granted Dec 31, 1991·3 cites·6 claims
- 4034US5572595AMethod of detecting the location of a human being in three dimensionsYOZAN INC·Filed 1992·Granted Nov 5, 1996·8 cites·9 claims
- 4132US5249136ASystem for measuring fluid-flow velocity distributionEZEL INC·Filed 1992·Granted Sep 28, 1993·2 cites·1 claims
- 4232US5136653AAcoustic recognition system using accumulate power seriesEZEL INC·Filed 1990·Granted Aug 4, 1992·5 cites·18 claims
- 4332US5023729AMethod and system for generating a density concurrent matrixEZEL INC·Filed 1989·Granted Jun 11, 1991·4 cites·8 claims
- 4431US5621823AImage processing method for thinning lines using index valuesYOZAN INC·Filed 1993·Granted Apr 15, 1997·2 cites·8 claims
- 4531US5416850AAssociative pattern conversion system and adaption method thereofEZEL INC·Filed 1993·Granted May 16, 1995·2 cites·5 claims
- 4630US5276778AImage processing systemEZEL INC·Filed 1990·Granted Jan 4, 1994·2 cites·22 claims
- 4730US5259065AData processing systemYOZAN INC·Filed 1992·Granted Nov 2, 1993·2 cites·7 claims
- 4830US5146549AMethod and apparatus for identifying a pair of groups in an image having a minimum separation distanceEZEL INC·Filed 1991·Granted Sep 8, 1992·1 cites·15 claims
- 4930US5103487AImage processing methodEZEL INC·Filed 1989·Granted Apr 7, 1992·1 cites·13 claims
- 5029US5355438AWeighting and thresholding circuit for a neural networkEZEL INC·Filed 1993·Granted Oct 11, 1994·3 cites·16 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →