1
Haruo Yamashita, Hideshi Ishihara, Yasuki Matsumoto: Gradation correction method and device. Matsushita Electrial Industrial, Ratner & Prestia, August 8, 2000: US06101271 (189 worldwide citation)

The gradation correction device includes a luminance signal convertor to generate a luminance signal from the input R, G, B signals, a correction coefficient calculator which calculates the ratio to the luminance signal of the luminance signal after gamma correction to the predetermined gradation ch ...


2
Haruo Yamashita, Takashi Yumiba: Color adjustment apparatus for automatically changing colors. Matsushita Electric Industrial, Ratner & Prestia, January 24, 1995: US05384601 (123 worldwide citation)

An automatic color adjustment apparatus for use in an imaging device for adjusting the color of a subject such as skin or leave, which is well retained in human memory, to be as natural as possible. The color adjustment apparatus has a weighting coefficient setting device for setting a weighting coe ...


3
Tsumoru Fukushima, Haruo Yamashita, Katsuhiro Kanamori: Backlit scene and people scene detecting method and apparatus and a gradation correction apparatus. Matsushita Electric Industrial, Wenderoth Lind & Ponack L, August 17, 1999: US05940530 (100 worldwide citation)

An apparatus for printing video images is disclosed. First the percentage of backlighting or people in the image is detected. That is, the probability of the presence of backlighting or people is detected. Then, the density gradation table is modified based on the detection result, and the presence ...


4
Tsumoru Fukushima, Haruo Yamashita, Katsuhiro Kanamori: Gray level correction apparatus. Matsushita Electric Industrial, Wenderoth Lind & Ponack, February 3, 1998: US05715377 (86 worldwide citation)

An apparatus for printing video images is disclosed. First the percentage of backlighting or people in the image is detected. That is, the probability of the presence of backlighting or people is detected. Then, the density gradation table is modified based on the detection result, and the presence ...


5
Haruo Yamashita, Yuji Takizawa, Kazuo Yamaguchi: Fault recovery system of a ring network. Fujitsu, Staas & Halsey, April 26, 1994: US05307353 (65 worldwide citation)

A fault recovery system of a ring network based on a synchronous transport module transmission system, having a fault data writing unit for writing, when an input fault is detected by a node, fault data in a predetermined user byte in an overhead of a frame flowing through both a working line and a ...


6
Hidetoshi Naito, Masaaki Kawai, Hisako Watanabe, Yuji Takizawa, Kazuyuki Tajima, Haruo Yamashita: System for monitoring ATM cross-connecting apparatus by inside-apparatus monitoring cell. Fujitsu, Staas & Halsey, October 26, 1993: US05257311 (62 worldwide citation)

A system for monitoring an ATM cross-connecting apparatus by inputting a test cell through a path for a main signal into the ATM cross-connecting apparatus, and examining the cell after the cell passed through the ATM cross-connecting apparatus. An initial value of a PN sequence and the PN sequence ...


7
Yuji Takigawa, Masaaki Kawai, Hidetoshi Naito, Hisako Watanabe, Kazuyuki Tajima, Haruo Yamashita: Cross-connection apparatus for B-ISDN. Fujitsu, Nippon Telegraph and Telephone Corporation, Staas & Halsey, November 23, 1993: US05265088 (55 worldwide citation)

A cross-connection apparatus for B-ISDN includes plural interface units, multiplexers, virtual path identifier (VPI) conversion tables, demultiplexers, and loop-back units and a switch unit. The interface unit has a reception port for receiving an ATM cell or inserting a monitor cell, and a transmis ...


8
Takashi Yumiba, Haruo Yamashita: Color adjustment apparatus. Matsushita Electric Industrial, Ratner & Prestia, February 22, 1994: US05289295 (49 worldwide citation)

A color adjustment apparatus includes a color space conversion circuit for obtaining a chromaticity signal in a rectangular coordinate system of a plane representing hue and saturation components. A pointed color chromaticity signal setting circuit sets a pointed color chromaticity signal, which is ...


9
Haruo Yamashita, Tsumoru Fukushima: Color conversion apparatus that restricts the color reproduction range of primary color signals. Matsushita Electric Industrial, McDermott Will & Emery, November 25, 1997: US05691779 (48 worldwide citation)

The present invention provides color conversion apparatus that prevents overflow in color reproduction, changes in hue, and the deterioration of gradation to improve image quality. The present color conversion apparatus inputs to itself luminance and color difference signals, sets a reference value ...


10
Masahiro Inagaki, Yoshihisa Fukushima, Haruo Yamashita, Yasushi Azumatani, Hiroshi Hamasaka: Information recording format having a plurality of bands with independent read and write control data. Matsushita Electric Industrial, Ratner & Prestia, October 22, 1996: US05568467 (47 worldwide citation)

A data recording medium using a format that includes: a data zone having a plurality of bands composed of at least one track, in which user data are written; and a control zone in which band control data are written. Each of the band control data corresponds to a respective one of the plurality of b ...