Location History:
- Ashigarakami, JP (1989)
- Kanagawa, JP (1986 - 2000)
Company Filing History:
Years Active: 1986-2000
Title: Keiichi Yamana: Innovator in Image Processing Technology
Introduction
Keiichi Yamana is a prominent inventor based in Kanagawa, Japan, known for his significant contributions to image processing technology. With a total of 12 patents to his name, Yamana has developed innovative methods that enhance the quality of image reading and color balance correction.
Latest Patents
One of his latest patents is an image reading method that achieves highly accurate image reading without losing color balance, regardless of the type of recording media. This method allows for the stable reproduction of high-quality images with excellent color and density balance. The process involves irradiating a reading light beam on a transparent-type original, separating the transmitted light into three primary colors, and reading it with a photoelectric transducer device. Adjustments are made independently for negative films and uniformly for reversal films, ensuring optimal results.
Another notable patent is a gray balance correcting method designed to avoid deterioration of color balance when images are photographed under various light sources. This method divides an image recorded on a negative film into numerous regions and measures the density values of cyan, magenta, and yellow. By calculating maximum and minimum reference values and using conversion correlation coefficients, the method effectively corrects color balance, ensuring accurate representation of the original image.
Career Highlights
Yamana has worked with notable companies in the field, including Fuji Photo Film Company, Limited and Fuji Photo Co., Ltd. His experience in these organizations has contributed to his expertise in image processing technologies and innovation.
Collaborations
Throughout his career, Yamana has collaborated with esteemed colleagues such as Izumi Watanabe and Shuichi Ohtsuka. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in image processing.
Conclusion
Keiichi Yamana's contributions to image processing technology through his innovative patents have significantly advanced the field. His work continues to influence the way images are captured and processed, ensuring high-quality results in various applications.