Masayuki Bannai

Title: Masayuki Bannai: Innovator in Color Correction and Contrast Adjustment Technologies

Introduction

Masayuki Bannai is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of image processing, particularly in color correction and contrast adjustment technologies. With a total of 2 patents to his name, Bannai's work has had a considerable impact on the way images are processed and displayed.

Latest Patents

Bannai's latest patents include a color correction processing circuit by each hue and a contrast adjusting circuit. The color correction processing circuit is designed to enable all hues in an image to be properly corrected without leaving any uncorrected range. This is achieved by dividing the inputted image data, represented by a combination of three color signals, into multiple ranges based on hue. The design ensures that correction ranges peripherally overlap, preventing any areas from being left uncorrected.

The contrast adjusting circuit, used in PDP displays, addresses the issue of images appearing whitish by suppressing the rise of luminance at low levels when contrast is heightened. This circuit optimally adjusts the contrast of images that vary over time. It includes an average luminance calculating section, a lookup table (LUT), and an output video data calculating section. The average luminance calculating section determines the average luminance level for multiple frame images, while the LUT determines central value data from the average luminance. The output video data calculating section then adjusts the contrast according to a specific calculation formula, ensuring that the rise of luminance at low levels is suppressed.

Career Highlights

Masayuki Bannai is currently employed at Fujitsu General Limited, where he continues to innovate in the field of image processing. His work has been instrumental in developing technologies that enhance the quality of visual displays.

Collaborations

Bannai has collaborated with notable coworkers, including Masakazu Fukuchi and Shuji Kiyama. Their combined expertise has contributed to the advancement of technologies in their field.

Conclusion

Masayuki Bannai's contributions to color correction and contrast adjustment technologies have established him as a significant figure in the field of image processing. His innovative patents reflect his commitment to improving visual display quality, making a lasting impact on the industry.