Canon Kabushiki Kaisha

Takehiko Shibata

Yoshikazu Yokomizo

Tadashi Yoshida

Katsuichi Shimizu

Nao Nagashima

Koichi Murakami

Ken Miyagi

Akira Suzuki

Masaharu Tsukada

Takaaki Ashinuma

Koji Suzuki

Yasuo Suzuki

Nobuhiro Kasama

Takayuki Aizawa

Shigeru Aoi

Makoto Shiho

Masaharu Tsukata

An image processing system of the invention has a reader which reads out an image of an original, a page memory which stores image information of the original in the form of electric signals, a disk memory which stores part or all of the image information in the disk memory and also stores image processing information, an image processing section, a digitizer for the operator to input the image processing information, a CRT which displays input information or corrections in convesation language, a DMA controller, and a printer. The image processing system of the invention is capable of DMA transfer without the intermediacy of a CPU. Fewer addresses are required for readout of the image information from the memory, and high speed image processing is achieved.

Image processing system

An optical information recording/reproducing apparatus for stably recording, reproducing, or erasing the information by a laser beam with respect to different kinds of optical disks is represented. This apparatus includes a processor to record, reproduce, or erase the information for an optical disk, a disk sort detector to detect the sort of optical disk, and a controller to control the processing parameters of the processor in response to an output signal from the disk sort detector. The disk sort detector reads the disk sort identifying information preliminarily recorded on the optical disk by the processor to detect the sort of disk. Or, this detector irradiates light onto labels having different reflection factors or transmission factors preliminarily provided on the optical disks by the processor and detects the reflected light amounts or transmitted light amounts from the labels, thereby detecting the sort of disk. The optical disks include disks of the type only for use of reproduction, the rerecordable type, and the writable type.

Optical information recording/reproduction apparatus including means for

An image processing system of the invention has a reader which reads out an image of an original, a page memory which stores image information of the original in the form of electric signals, a disk memory which stores part or all of the image information in the disk memory and also stores image processing information, an image processing section, a digitizer for the operator to input the image processing information, a CRT which displays input information or corrections in conversation language, a DMA controller, and a printer. The image processing system of the invention is capable of DMA transfer without the intermediacy of a CPU. Fewer addresses are required for readout of the image information from the memory, and high speed image processing is achieved.

An apparatus for recording or reproducing information on or from a recording medium such as a disk which rotates at a constant angular velocity. This apparatus comprises: a system to record or reproduce the data on or from the disk; a circuit to designate the recording or reproduction address of the data on the disk; and a control circuit to control the data recording or reproducing rate for the disk. The control circuit makes the recording or reproducing rate constant for a predetermined data and changes the recording or reproducing rate for the other data in accordance with the recording or reproduction address. In this apparatus, by providing track groups in the header portions and data recording portions in the direction of radius of the disk, the clock rate can be easily changed and the recording density is increased and the access time is reduced.

Information recording/reproducing apparatus including a plurality of

An image processing system of the invention has a reader which reads out an image of an original, a page memory which stores image information of the original in the form of electric signals, a disk memory which stores part or all of the image information in the disk memory and also stores image processing information, an image processing section, a digitizer for the operator to input the image processing information, a CRT which displays input information or corrections in conversation language, a DMA controller, and a printer. The image processing system of the invention is capable of DNA transfer without the intermediacy of a CPU. Fewer addresses are required for readout of the image information from the memory, and high speed image processing is achieved.

This invention provides an image reproduction device having a horizontal coordinate memory, a vertical coordinate memory and a domain code memory which comprise respectively a RAM, horizontal and vertical counters, horizontal and vertical coordinate comparators, an addressable latch for the horizontal coordinate comparator and an addressable latch for the vertical coordinate comparator, gate circuits and an A/D converter. The image reproduction device prevents recording in black of a portion surrounding the original when the size of a recording medium is larger than that of the original, thus preventing poor appearance of the image reproduced on recording medium.

Image reproduction device

An information transmitting apparatus having plural terminal units connected in a loop-shaped transmission channel, in which the signal transmission is maintained even in the event of a failure of power supply to a terminal unit, by effective use of back-up power supply according to the state of function of terminal units.

Loop transmission with back-up power supply for the interface

A video signal processing apparatus for encoding video into binary signals employs dither coding. The apparatus comprises a device for setting a plural number of divided areas of an original image and a processing circuit for processing video signals corresponding to the respective divided areas using different dither patterns.

Apparatus for processing video signals

A surface potentiometer having a measuring electrode disposed at a predetermined distance from a surface to be measured and in which the electric field between the measuring electrode and the surface to be measured is intermittently shielded by a rotatable chopper to thereby induce an AC signal in the measuring electrode and the AC signal is clamped at a timing corresponding to the position of the chopper relative to the electrode to thereby accurately measure the potential of the surface to be measured.

Growing community of inventors

Kokubunji, Japan

Takehiko Shibata