Hitachi, Ltd.

Hitachi Industry & Control Solutions, Ltd.

Akinori Shiozawa

Hisataka Sugiyama

Hiroyuki Minemura

Hiroaki Ono

Makoto Kikuchi

Kouji Minabe

Kazunori Uemura

Haruhiko Miyao

Teruo Hoshi

Hiroyuki Miyahara

Hiroyuki Tarumizu

Makoto Asuka

Takeshi Tahara

Masataka Ohta

Satoshi Nidaira

Ryohei Kittaka

Akihiro Musha

Yuki Ebina

Horoaki Ono

An imaging apparatus is provided in which a flicker is prevented. The imaging apparatus includes an imaging part that includes an optical system to form an image of a subject and an imaging element to generate an image signal by photoelectrically converting an optical image of the subject formed by the optical system, an image processing part to perform an image processing on the image signal, a display part/operation part having at least display and setting functions, a luminance change detection part to detect change of luminance of the subject, a signal processing part to calculate flicker amounts at respective frequencies based on signal intensities with respect to luminance change information acquired by the luminance change detection part, and a control unit to cause the display part/operation part to display the flicker amounts at the respective frequencies calculated by the signal processing part.

Imaging apparatus for controlling and displaying flicker amounts

In order to stably detect a flicker under an illumination of a fluorescent lamp with an XY-addressed-scanning type image sensor used and to cancel the flicker, the present invention provides an image sensing device, wherein a video signal in any area on an imaging plane is first integrated per frame period, then an integrated value in a current frame is sequentially compared with a one-frame previously integrated value, next whether a variation pattern of the integrated value matches one of flicker patterns when the flicker occurs is determined, then an existence of the flicker is determined when an identical flicker pattern is seen more than two consecutive times.

Image sensing device

In a microcomputer included in an image device, a mask 2D 3D converting section expresses coordinates of a 2-dimensional image plane defined by an imaging element having a rectangular contour in a 3-dimensional coordinate system. The image plane is positioned in the state that a focal length corresponding to a zoom position is adopted as a Z coordinate value of the image plane in the 3-dimensional coordinate system. A mask display position calculating sectioncalculates a 2-dimensional position of a mask on a camera screen by utilizing a similarity of the size of the image plane and the size of the camera screen when a position of a mask on the image plane in the 3-dimensional coordinate system after PAN, TILT rotations and a zooming is converted into the 2-dimensional position of the mask on the camera screen.

Image device, surveillance camera, and mask method of camera screen

An optical disk apparatus which can carry out tilt control using a signal of a focus control system so as to improve the recording/reproducing performance of an optical disk. The optical disk apparatus includes a motor which rotates the optical disk, an optical pickup which reads at least information from the optical disk being rotated by the motor, a first memory which uses information of a rotation angle of the optical disk from the optical pickup as an address, a second memory which stores an offset by which information stored in the first memory should be shifted and then read, and a control portion which reads the information stored in the first memory after shifting the information by the offset stored in the second memory and which carries out tilt control using the read information.

Optical disk apparatus and tilt control method thereof

When user data is recorded on a write-once medium, linking variations can be reduced that are produced as management information for managing the user data is updated by additionally recording on and off, thereby assuring the reliability of the reproduction compatibility of the DVD player. Before the final file of the management information is recorded, dummy data of a plurality of successive blocks are recorded at a time by a single operation, and then the final file is additionally recorded after the dummy data. Therefore, the linking precision can be prevented from being degraded in the linking portions of the management information, and thus the management information can be properly read when the DVD player makes compatible reproduction of the medium.

Information recording method and optical disk apparatus

An optical disc apparatus including a system controller that receives a recording control command via an interface. A recording control block that receives a recording method command signal indicative of one of recording with verify and real time recording and recording data from the system controller. An optical head that modulates the power of laser beam using a recording pulse sent from the control block and records the recording data on an information recording medium. The recording data is recorded in the information recording medium according to the recording with verify and the real time recording using different recording power respectively, in which under the recording with verify, the recording power determined by recording compensation learning is used, and under the real time recording, the recording power higher than the recording power obtained by the recording compensation learning is used.

Optical disc apparatus and information recording apparatus using the optical disc apparatus

Growing community of inventors

Yokohama, Japan

Akinori Shiozawa