Canon Kabushiki Kaisha

Masaharu Tsukada

Takehiko Shibata

Tadashi Yoshida

Katsuichi Shimizu

Nao Nagashima

Koichi Murakami

Yoshikazu Yokomizo

Ken Miyagi

Akira Suzuki

Takayuki Aizawa

Shigeru Aoi

Takaaki Ashinuma

Yasuyuki Tamura

Yasuo Suzuki

Junichi Kimizuka

Takahiro Inoue

Eiichi Fujii

Kazuhiro Hirayama

Haruo Shimizu

Norio Hashimoto

Nobuhiro Kasama

Makoto Shiho

Ryuichi Iwanaga

Tohru Tatsuno

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

A method for initializing a magnetooptical recording medium having tracks onto which information is recorded are formed in parallel and having intermediate regions among the tracks. The method includes the steps of scanning a track by a laser beam while applying a magnetic field in a predetermined direction, thereby aligning magnetizing directions of the track; and scanning the intermediate region by the laser beam while applying a magnetic field in a predetermined direction, thereby aligning the magnetizing directions of the intermediate region. An apparatus to perform such a method is also disclosed.

Method and apparatus for initializing intermediate region between tracks

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 forming apparatus for forming an image by using a scanning light beam includes a light beam generator for generating a light beam and for modulating the light beam in accordance with an image signal, a scanner for scanning a photosensitive member with the light beam, and a beam detector for detecting the light beam scanned by the scanning means at a predetermined position along the scanning path. Setting circuitry switches and sets a pixel density of an image to be formed. The light quantity of the light beam is controlled in accordance with the pixel density set by the setting circuitry, and/or the light beam detection level of the detector is switched in accordance with the pixel density set by the setting circuitry.

Image forming apparatus having light beam intensity switching for

Method and apparatus for recording information on an opto-magnetic recording medium by applying an A.C. magnetic field of a constant frequency to the opto-magnetic recording medium as a recording bias magnetic field and scanning the medium by a light beam modulated with a recording signal in synchronism with the A.C. magnetic field to record the information.

Method and apparatus for recording information on an opto-magnetic

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 image system can output image information to a plurality of output devices at a time, has a function to print, display, or store an image information before all of the image information is completely read out, and has a function to output an image information stored in a memory device by using an interface, before the completion of reading all of the image information. The image processing system includes for an example a readout device for reading image information; a storage device for storing the image information from the readout device; an output device for printing or displaying the image information from the readout device; an interface device for outputting a read-out information to the output device before the image information is completely read out; wherein the image information from the readout device is stored into the storage device by using the interface device.

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.

There is provided an image display apparatus which imputs image information and displays it on a large display surface. This apparatus comprises: a photo sensitive material belt; rollers to support and drive the belt and a motor to rotate the drive roller; an image exposing apparatus of the laser beam scanning method; a toner developer; a pulse generator for continuously generating pulses in association with the rotation of the drive roller; a counter to count the pulses; and a controller to control the stop timing of the drive roller in order to stop the movement of the belt in accordance with the count value of the counter. The movement of the belt is controlled at the accurate timing synchronized with the pulses from the pulse generator. Thus, it is prevented that a joint of the belt appears in the display section, and the image information is displayed at the proper location in the display surface. Also, since the image exposure is performed by the extremely thin laser beam, the image information such as small and thin characters, graphics, etc. can be clearly displayed, so that the image with good visibility is derived. A coordinate pattern can be also added onto the display image for easy editing.

Image display apparatus

In an apparatus using a semiconductor laser to record image information, an optical filter for decreasing the difference between the rising peak value and the steady value of the intensity of a laser beam is disposed in the optical path of the laser beam in order to prevent any density difference attributable to the difference between the rising peak value and the steady value from being created in the image.

Image information recording apparatus

This specification discloses an image recording apparatus provided with a developing sleeve for guiding and supplying charged toner to cause the charged toner to adhere to an electrostatic latent image on the surface of a photosensitive medium, and means for detecting the feed of multiple transfer sheets, wherein the developing sleeve is provided so as to enable the change over to a potential for releasing the supply of the toner to the photosensitive medium by the adherence of the toner thereto and the change-over is effected in response to the detecting operation of the multi-copy feed detecting means.

Image recording apparatus

An image forming apparatus in which a recording medium is scanned with plural light beams. The apparatus includes a beam generator for generating plural light beams, a scanner for scanning with the light beams, and an optical system for reducing the distance between the plural light beams on the recording medium.

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Kawasaki, Japan

Masaharu Tsukada