Canon Kabushiki Kaisha

Makoto Hiramatsu

Yoichi Yamagishi

Keihiro Kurakata

Kazuyoshi Ishii

Hajime Watanabe

Koyo Hasegawa

Masayoshi Sekine

Susumu Matsumura

Masakuni Yamamoto

Takashi Aizawa

Yuji Koide

Yasuyuki Miyaoka

Motohiro Ishikawa

Yutaka Ogasawara

Saburo Tazaki

An image pickup apparatus has a live view mode, and includes a computer configured to adjust an aperture value of an image pickup optical system so as to maintain constant a depth of field when a zoom position of the image pickup optical system is changed. In response to a signal indicative of an increase of the zoom position, the computer in the live view mode is configured to output a signal used to increase the aperture value and a signal used to increase a gain of the image pickup element, and to make the display unit display the image data with a changed zoom position, a changed aperture value, and a changed gain. In response to an instruction to obtain a still image, the computer is configured to obtain the still image with the changed zoom position, the changed aperture value, and the changed gain.

Image pickup apparatus

An image capturing apparatus that commences a pre-shooting operation on a first stroke of a release button, executes a shooting operation on a second stroke of the release button, and stores generated image data in a connected storage medium. The image capturing apparatus includes a power supply unit adapted to supply power to the storage medium, and a controller configured to control the power supply unit so that the power supply to the storage medium is started in response to the first stroke of the release button going ON.

Image input apparatus, a method of controlling thereof and a computer-readable storage medium

An apparatus has an image sensing device, and a signal processing device for performing a first image sensing operation for making the image sensing device perform an image sensing operation in an exposure state to obtain a sensed image signal, and a second image sensing operation for making the image sensing device perform an image sensing operation in a non-exposure state to obtain a sensed image signal, and processing the sensed image signal obtained by the first image sensing operation by the sensed image signal obtained by the second image sensing operation. The signal processing device determines in accordance with the image sensing time of the first image sensing operation whether or not the second image sensing operation is performed.

Imaging system where a quick return mirror is returned to a down state and a stop is returned to a fully open state before the accumulation period ends

An image input apparatus that includes a solid-state image sensing device having a plurality of pixels; a shutter having a front curtain and a rear curtain for opening and blocking an optical path to the solid-state image sensing device; a shutter-curtain sensor that senses passage of the front and rear curtains at a plurality of positions; and a reset unit that resets pixels of the solid-state image sensing device successively before the sensor senses passage of the rear curtain upon elapse of a prescribed period of time after the sensor senses passage of said front curtain.

Exposure control of image input apparatus

Image sensing apparatus having a signal processing device that uses a signal imaged in a non-exposure state to process a signal in an exposure state

At least one exemplary embodiment is directed to an imaging apparatus which can include a plurality of pixel sections disposed in a two-dimensional pattern. Each pixel section can include a photoelectric conversion member, a semiconductor region holding a signal transferred from the photoelectric conversion member, a transfer switch transferring the signal of the photoelectric conversion member to the semiconductor region, and a reading member reading a signal of the semiconductor region. A plurality of vertical output lines, successively output signals of the pixel sections. At least one horizontal output line successively outputs signals of the plurality of vertical output lines.

Imaging apparatus using saturation signal and photoelectric conversion signal to form image

Image data having a high S/N ratio is obtained even when the exposure time is relatively long. To achieve the above object, there is provided an image input apparatus in which an accumulation mode is set with the shutter open, thereby acquiring image data A. The shutter is then closed, and the accumulation mode is set to acquire subtraction data between the image data and black image data A. This processing is repeated to acquire image data Aand subtraction data Aand these subtraction data are added. These operations AAand Aare repeated a predetermined number of times to update addition data, and image processing is performed on the basis of the updated addition data.

Image input apparatus having addition and subtraction processing

To provide a high-performance image pickup system capable of reducing an image area and effectively using a memory, in transfer of one-frame image data from an image pickup device to an image processing circuit, the one-frame image data is divided into a plurality of blocks, and the blocks are transferred. The image processing circuit temporarily stores the one-block image data in a memory circuit and performs predetermined image processing of the stored one-block image data. The image processing circuit then temporarily stores the next one-block image data in the memory circuit and performs predetermined image processing for this stored one-block image data. The predetermined image processing can be performed in units of blocks. The necessary image area can have a capacity of at least one block in the memory circuit in the image processing circuit.

Image pickup system and storage medium

A data reproducing apparatus for reproducing data subjected to convolution by partial response, by using maximum likelihood, includes a memory including a plurality of memory arrays which respectively correspond to plural states that the data can take and each of which has a predetermined number of regions each corresponding to a time point. A detecting device periodically detects, from the data, states before the plural states have been shifted, and a control device causes values respectively representing the detected states before shifting to be sequentially stored in the regions of the memory arrays every time detection is performed by the detection device, causing the values previously stored in the memory arrays to be replaced in accordance with the detected states before shifting, and when all values stored in the regions of the memory arrays corresponding to the same time point match, reproducing the data on the basis of the matching value.

Data reproducing method and apparatus

An information reproducing apparatus for simultaneously reproducing information recorded on a recording medium such as a magneto-optical disk through a plurality of information channels by using a multibeam spot of a laser beam includes a circuit for generating a reproduction signal on the basis of a signal detected from one of the information channels and a signal detected from another information channel. The generating circuit includes a light source, a photodetective sensor, a waveform equalizing circuit, and a binarizing circuit provided in correspondence to each information channel and a data separator for generating reproduction data on the basis of an output of each binarizing circuit and a clock signal.

Information reproducing apparatus and method for reproducing information

A magnetic head drive device is provided with a magnetic head for generating a magnetic field, a pair of switching elements for switching a current flow direction in the magnetic head, and auxiliary coils respectively connected serially to the switching elements. The current in the magnetic head is controlled by on/off operations of the paired switching elements so as to generate a magnetic field modulated according to an information signal to be recorded. Additional switching elements are serially connected to the auxiliary coils, respectively. In magnetic field modulation recording, the additional switching elements are maintained in the on-state while the modulated magnetic field is generated by the on/off operations of the paired switching elements. In optical modulation recording, the additional switching elements and the paired switching elements are controlled so as to fix the current direction in the magnetic head to generate a magnetic field corresponding to an operation mode such as an erasing mode or a recording mode.

Magnetic head driving device and magnetooptical recording apparatus

An information reproducing apparatus includes a reproduction clock generating device for generating a reproduction clock on the basis of a multivalue signal of a reproduction signal reproduced from an information recording medium, and a reproduction data detecting device for detecting the multivalue signal by using the reproduction clock, and for generating reproduction data synchronized with the reproduction clock. The apparatus further includes a first waveform equalizer for performing waveform equalization of the reproduction signal which is suitable for generation of the reproduction signal, and a second waveform equalizer, arranged independently of the first waveform equalizer, for performing waveform equalization of the reproduction signal which is suitable for detection of the reproduction signal.

Information reproducing apparatus for reproducing digital information by

In a magnetooptical recording apparatus, a light beam is radiated onto a magnetooptical recording medium while applying a bias magnetic field to the recording medium in such a manner that at least one of the light beam and the bias magnetic field is modulated according to an information signal. A current to be supplied from a DC power supply to the bias magnetic field applying device is switched by a switch element. The current switched by the switch element is smoothed by a smoothing circuit. The current to be supplied from the DC power supply to the bias magnetic field device is detected by a current detection element. A ratio between ON and OFF time periods of the switch element is changed in correspondence with an error between a value detected by the current detection element and a pre-set reference value.

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Ebina, Japan

Makoto Hiramatsu