Hidefumi Ohsawa

Person

Urawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image management apparatus and method, image management system, and...
- Patent number 6,509,900
- Issue date Jan 21, 2003
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Color image processing apparatus
- Patent number 6,415,052
- Issue date Jul 2, 2002
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for producing a half-tone image
- Patent number 6,285,464
- Issue date Sep 4, 2001
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Information processing apparatus and method which selectively contr...
- Patent number 6,266,449
- Issue date Jul 24, 2001
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Coding method and apparatus therefor
- Patent number 6,026,197
- Issue date Feb 15, 2000
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image encoding and decoding apparatus
- Patent number 5,991,450
- Issue date Nov 23, 1999
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing apparatus capable of removing an edge portion from...
- Patent number 5,917,956
- Issue date Jun 29, 1999
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Color image encoding method
- Patent number 5,903,366
- Issue date May 11, 1999
- Canon Kabushiki Kaisha
- Yasuji Hirabayashi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Block matching method and apparatus which can use luminance/chromin...
- Patent number 5,900,910
- Issue date May 4, 1999
- Canon Kabushiki Kaisha
- Yasuji Hirabayashi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing apparatus
- Patent number 5,898,461
- Issue date Apr 27, 1999
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encoding apparatus and method for encoding a quantized difference b...
- Patent number 5,892,546
- Issue date Apr 6, 1999
- Canon Kabushiki Kaisha
- Yasuji Hirabayashi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Selectively utilizing multiple encoding methods
- Patent number 5,883,976
- Issue date Mar 16, 1999
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing method and apparatus
- Patent number 5,875,039
- Issue date Feb 23, 1999
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing apparatus and method in which multi-level color si...
- Patent number 5,844,718
- Issue date Dec 1, 1998
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive image coding method and apparatus
- Patent number 5,825,934
- Issue date Oct 20, 1998
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing method and apparatus for converting between data c...
- Patent number 5,818,537
- Issue date Oct 6, 1998
- Canon Kabushiki Kaisha
- Miyuki Enokida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing apparatus
- Patent number 5,790,195
- Issue date Aug 4, 1998
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Color image processing apparatus
- Patent number 5,732,153
- Issue date Mar 24, 1998
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Coding method and apparatus therefor
- Patent number 5,655,032
- Issue date Aug 5, 1997
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image encoding method
- Patent number 5,331,426
- Issue date Jul 19, 1994
- Canon Kabushiki Kaisha
- Shigeo Kato
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image treatment method and apparatus with error dispersion and cont...
- Patent number 5,325,448
- Issue date Jun 28, 1994
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Binary image data coding method having the function of correcting e...
- Patent number 5,282,256
- Issue date Jan 25, 1994
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image encoding method
- Patent number 5,136,396
- Issue date Aug 4, 1992
- Canon Kabushiki Kaisha
- Shigeo Kato
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Color image processing with undercolor removal suitable for use in...
- Patent number 5,126,838
- Issue date Jun 30, 1992
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image encoding apparatus
- Patent number 5,124,811
- Issue date Jun 23, 1992
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing apparatus
- Patent number 5,068,746
- Issue date Nov 26, 1991
- Canon Kabushiki Kaisha
- Hidefumi Ohsawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image processing method and apparatus for error-dispersion digitiza...
- Patent number 5,008,950
- Issue date Apr 16, 1991
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing method and apparatus with error diffusion capability
- Patent number 4,975,786
- Issue date Dec 4, 1990
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing method and apparatus with conditional correction o...
- Patent number 4,958,238
- Issue date Sep 18, 1990
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image processing method and apparatus with dot-processing
- Patent number 4,958,218
- Issue date Sep 18, 1990
- Canon Kabushiki Kaisha
- Akihiro Katayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hidefumi Ohsawa

Person

Patents Grantslast 30 patents

Image management apparatus and method, image management system, and...

Color image processing apparatus

Apparatus and method for producing a half-tone image

Information processing apparatus and method which selectively contr...

Coding method and apparatus therefor

Image encoding and decoding apparatus

Image processing apparatus capable of removing an edge portion from...

Color image encoding method

Block matching method and apparatus which can use luminance/chromin...

Image processing apparatus

Encoding apparatus and method for encoding a quantized difference b...

Selectively utilizing multiple encoding methods

Image processing method and apparatus

Image processing apparatus and method in which multi-level color si...

Adaptive image coding method and apparatus

Image processing method and apparatus for converting between data c...

Image processing apparatus

Color image processing apparatus

Coding method and apparatus therefor

Image encoding method

Image treatment method and apparatus with error dispersion and cont...

Binary image data coding method having the function of correcting e...

Image encoding method

Color image processing with undercolor removal suitable for use in...

Image encoding apparatus

Image processing apparatus

Image processing method and apparatus for error-dispersion digitiza...

Image processing method and apparatus with error diffusion capability

Image processing method and apparatus with conditional correction o...

Image processing method and apparatus with dot-processing