Hitachi, Ltd.

Kenji Ichige

Masuo Oku

Takuya Imaide

Masaru Takahashi

Hiroo Okamoto

Takao Arai

Hitoaki Owashi

Koichi A Ono

Naoki Yamamoto

Keizo Nishimura

Ryuji Nishimura

Shigemitsu Higuchi

Yoshimichi Kudo

Katsuyuki Watanabe

Yukio Fujii

Hiroyuki Kuriyama

Atsuo Suga

Yukitoshi Tsuboi

Hiroto Yamauchi

Noriyuki Iura

Norio Yatsuda

Tomohide Sorihashi

Mayuko Oda

Kooji Minabe

Provided is a device which performs vein authentication by using a downward irradiation-type thin module and selecting an image of a proper angle by varying the irradiation direction of near-infrared illumination. Realized are a photographing method and control method of a finger vein image suitable for thin devices such as a smartphone. Adopted is a finger vein authentication device comprising an imaging unit, an illumination unit which is disposed on a substantially same plane as the imaging unit, and irradiates a finger to be captured by the imaging unit with light in which an irradiation angle is variable, an image selection unit which selects an image according to the irradiation angle of the illumination unit, and an authentication processing unit which performs authentication processing using the image selected by the image selection unit.

Finger vein authentication device

A picture communication apparatus includes an extracting circuit for extracting video data of at least one portion from video data inputted thereto, an encoder for respectively encoding the extracted video data and the remaining video data, and a multiplexer for multiplexing the encoded video data. When encoding the video data, predetermined amount of codes are allocated to the respective video data. This suppresses deterioration in the picture quality when conducting an image communication via a transmission path having a low transmission rate. The transmitted video is displayed on a contoured display.

Image signal encoding and communicating apparatus using means for

A digital processing unit for converting a digital picture signal into data by blocks and for correction encoding a variable-length encoded signal. This digital processing unit includes a digital data compressing section for dividing a picture signal into a plurality of number of blocks, and compressingly outputting digital data of this picture signal based on a processing unit of one or a few blocks, a buffer section for sequentially storing the digital data, and an error correction encoding section for sequentially reading the digital data from this buffer section, and structuring an inner code for each inner block structured by this digital data and structuring an outer code for each predetermined unit of inner blocks, to thereby structure two-dimensional error correction code blocks, to output an error correction code signal. Further, the error correction encoding section has the length of the digital data of the picture signal included in the inner code set to be equal to or larger than a mean code length of predetermined compressed blocks.

Picture signal digital processing unit

A computer system replaces an input device, such as a mouse, with a video camera having an image recognizing function and an image extracting function to detect motions of the operator's body directly, and controls a computer apparatus to move a cursor and check on an icon on the basis of the output signals of the video camera. The computer system controls the computer apparatus also on the basis of a signal provided by the video camera upon the detection of light emitted by a particular object. The computer system is capable of making the computer apparatus understand an operator's intention without using any conventional input device, such as a mouse, and of facilitating an operator's input operation.

Computer system that enters control information by means of video camera

A recording and/or reproducing apparatus for recording and/or reproducing image signals compressed according to different compressing methods. This recording and/or reproducing apparatus includes a compressing circuit for compressing first image data according to a first image data compressing method, a selecting circuit supplied with the first image data thus compressed and encoded by the compressing circuit and second image data compressed and encoded according to a second image data compressing method and selecting any one of the first and second compressed image data, and a first error correction encoding circuit for error correction encoding the selected compressed image data. The recording and/or reproducing apparatus further includes a recording and/or reproducing circuit for recording and/or reproducing the error correction encoded data on and/or from a recording medium, a first error correction decoding circuit for error correction decoding the compressed image data reproduced by the recording and/or reproducing circuit, an image data expanding circuit for expanding the compressed image data that has been error-corrected by the error correction decoding circuit, and an output circuit for outputting the first image data expanded by the image data expanding circuit. The second image data has a bit rate not greater than that of the first image data.

Recording and/or reproducing apparatus for recording and/or reproducing

A digital video signal recording and reproducing apparatus and method wherein a basic block is constituted by a plurality of pixels of video signals. A picture data compressing unit effects data compression of the video signals so that a compression data quantity after data compression becomes a constant with respect to a compression block constituted by a plurality of the basic blocks, and the compressed data o the video signals are recorded on a data recording medium. A compression block setting sets a number of the basic blocks to constitute the compression block in response to different operation modes of the digital video signal recording and reproducing apparatus which are different in at least one of resolution of the video signals, recording time and data compression system, and controls the picture data compressing unit so that the number of the compression blocks of the video signals recorded on one track of the data recording medium after data compression by the picture data compressing unit becomes M in a first operation mode, where M is a positive integer, and the number of the compression blocks becomes a positive integer in each of the other operation modes.

Digital video signal recording and reproducing apparatus and method for

A color picture signal processing circuit, a filter circuit and a luminance/carrier chrominance signal separation circuit implemented by employing the filter circuit. The circuit processing signal includes an adaptive-type (C) comb line filter through which the luminance signal is caused to pass. The output of the filter undergoes amplitude limitation in a limiter circuit, the output of which is subtracted from the original luminance signal. The carrier chrominance signal is added to the luminance signal to obtain a composite picture signal. The filter circuit is comprised of a pulse pattern suppressing circuit including a decision circuit for deciding which of positive and negative patterns the three adjacent data form constitute, a positive pulse pattern suppressing circuit, a negative pulse pattern suppressing circuit and a circuit selecting for either one of the output signal of the positive and negative pulse pattern suppressing circuits in accordance with the result of decision made by the decision circuit.

Luminance/chrominance signal separation circuit having filter circuit

Growing community of inventors

Chigasaki, Japan

Kenji Ichige