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For the Inventor, By the Inventor

Kawasaki, Japan

Hiroaki Kotera

This inventor holds 21 USPTO granted patents, primarily in Image Signal Processing. Top assignees: Matsushita Electric Industrial Co., Ltd., Matsushita Graphic Communication Systems, Inc., Matsushita Research Institute Tokyo, Inc.. Active years: 1976-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroaki Kotera. Retrieved from https://idiyas.com/inventor/hiroaki-kotera

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 21

% Patents Active = 100.0

Average Co-Inventor Count = 4.4

ph-index = 12

Forward Citations = 572(Granted Patents)


Location History:

  • Takatsuki, JA (1976)
  • Kawasaki, JA (1976 - 1978)
  • Kawasaki, JP (1979 - 1996)

Company Filing History:

goldMedal19 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents
silverMedal2 out of 191 
 
Matsushita Graphic Communication Systems, Inc.
 patents
bronzeMedal2 out of 5 
 
Matsushita Research Institute Tokyo, Inc.
 patents
where one patent can have more than one assignee

Years Active: 1976-1996

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Areas of Expertise:
Color Converting Apparatus
Image Signal Processing
Color Correction Method
Image Display
Bi-Level Image Conversion
Halftone Images
Color Separation
Facsimile System
Dot Printer
Color Signal Values
Image Data Expansion
Statistical Techniques
21 patents (USPTO):Explore Patents
1. 5504821 - Color converting apparatus for performing a three-dimensional color (1996-04-02),
2. 5241373 - Apparatus for correction of color signal values (1993-08-31),
3. 5229868 - Method and apparatus for converting a line density of a bi-level image (1993-07-20),
4. 5202935 - Color conversion apparatus for altering color values within selected (1993-04-13),
5. 5200738 - Method of image display with scrolling capability (1993-04-06),
6. 5134272 - Image signal processing apparatus for bar code image signal (1992-07-28),
7. 4929978 - Color correction method for color copier utilizing correction table (1990-05-29),
8. 4903147 - Method and apparatus for processing an image (1990-02-20),
9. 4814867 - Color correction processor with memory addressed by color component (1989-03-21),
10. 4747154 - Image data expanding and/or contracting method and apparatus (1988-05-24),
11. 4736254 - Method and apparatus for generating pseudo-halftone dots by comparing (1988-04-05),
12. 4470072 - Method of band compression (1984-09-04),
13. 4458265 - Color image duplicating system (1984-07-03),
14. 4394662 - Dot printer for reproduction of halftone images (1983-07-19),
15. 4180330 - Method of and a system for color separation (1979-12-25),

Title: **Hiroaki Kotera: Innovator in Color Conversion Technologies**

Introduction

Hiroaki Kotera, an accomplished inventor based in Kawasaki, Japan, has made significant contributions to the realm of color conversion technologies. With an impressive portfolio of 21 patents, his work has enhanced how digital color values are processed and utilized in various applications.

Latest Patents

Among his latest innovations are two notable patents focused on color conversion apparatuses. The first patent introduces a color converting apparatus designed to perform three-dimensional color conversions. This device features a table memory that stores color converting data defined in an output color space, with addresses strategically placed at lattice points within cubic blocks formed by partitioning a lightness-color difference space.

The second patent details a color value correction apparatus that efficiently converts successive combinations of input tricolor digital values into output color values. This apparatus utilizes three table memories to store values indicating differences between color values and a common reference color value. By executing only three multiplication operations followed by addition, the apparatus can derive an interpolated output value, showcasing efficiency and ingenuity.

Career Highlights

Throughout his career, Hiroaki Kotera has been associated with reputable organizations such as Matsushita Electric Industrial Co., Ltd. and Matsushita Research Institute Tokyo, Inc. His tenacity and expertise in his field have led to remarkable advancements in digital color technology.

Collaborations

Hiroaki has also collaborated with skilled professionals like Yukifumi Tsuda and Hiroyoshi Tsuchiya, contributing to groundbreaking projects that underscore the importance of teamwork in innovation and invention.

Conclusion

In summary, Hiroaki Kotera's innovative contributions to color conversion technologies exemplify his dedication as an inventor. His patents not only reflect his technical expertise but also signify a commitment to enhancing digital color processing, ultimately benefiting various industries reliant on accurate color representation.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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