Canon Kabushiki Kaisha

Hiromichi Yamada

Hiroshi Mano

Takashi Kawana

Kaoru Seto

Atsushi Kashihara

Masaki Ojima

Tetsuo Saito

Hiroshi Sasame

Masaharu Ohkubo

Michio Itoh

Seiji Uchiyama

Michio Ito

Hiroshi Atobe

Makoto Takeuchi

Masahiro Goto

Junichi Kato

Yoji Serizawa

Koichi Hiroshima

Shinichi Tsukida

Takahiro Inoue

Kazuro Yamada

Yukihide Ushio

Akio Noguchi

Shimpei Matsuo

Koichi Suwa

Manabu Takano

Kiyoshi Kanaiwa

Tatsuya Nakamura

Akihiko Takeuchi

Kimio Nakahata

Masahide Hirai

Katsuhiko Nishimura

Masuo Yamazaki

Takashi Shibuya

Yasuo Yoda

Masami Takeda

Daisuke Murata

Tohru Kosaka

Tohru Saitou

Takashi Soya

Hiroki Kisu

Atsushi Shoji

Toshio Yoshimoto

Makoto Abe

A copy-forgery-inhibited (CFI) pattern image is effectively printed irrespective of difference in information of (CFI) pattern setting between a host unit and a printing apparatus in relation to printing of a (CFI) pattern image. A (CFI) pattern image, for example, 'COPY INHIBIT' is set on the printer side while a (CFI) pattern image 'COPY' is set under a printing instruction delivered from a host PC. If determination is resulted in inconsistency between strings, indication for asking the user which (CFI) pattern image is given preference to be displayed on an UI screen of the printer. Further, similar indication is displayed on the host PC side. Thus, it is possible to render the user to determine whether the setting of a (CFI) pattern image on the host PC side is given preference to or the setting on the printer side is given preference to.

Printer and printing method

An image recording apparatus for recording image data from an external apparatus is provided, which receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.

Image recording apparatus which sends charasteristic/correction signals whenever new look-up table are selected or a pre-selected number of pages have been printed

An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of a second, higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.

Dot image data output apparatus

An output apparatus capable of receiving multi-level dot information of a first recording dot density, generating multi-level dot information of a second recording dot density, and transmitting the thus-generated second dot information in a visible way. The output apparatus comprises: a receiving device capable of receiving multi-level dot information of a first recording dot density; a generating device capable of generating multi-level interpolation dot information by applying a predetermined calculation to the thus-received multi-level dot information; and a dot density conversion device capable of generating multi-level dot information of second higher recording dot density from said interpolation dot information and the received multi-level dot information, whereby high density image data can be generated from low density image data.

Dot image output apparatus

An image forming apparatus including a rotatable developing member having a plurality of developing devices for developing an image bearing member at a first developing station, and a second single developing device arranged upstream of the rotatable developing member for developing the image bearing member exclusively at a second developing station different from the first developing station. The second developing device has a cover portion covering the rotatable developing member, and a portion of the cover portion is disposed at a position spaced apart from a rotation axis of the rotatable developing member by a predetermined length in a horizontal direction away from the image bearing member. The rotatable developing member rotates in an opposite direction with respect to the direction of rotation of the image bearing member to prevent toner from scattering toward the optical system.

Image forming apparatus having a rotatable first developing member, and

An image recording apparatus for recording image data from an external apparatus receives the image data as an image signal from the external apparatus, records the received image signal, and outputs a characteristic signal regarding a recording characteristic of the recording apparatus to the external apparatus.

Images processing apparatus for controlling binarized multi-value image

A data processing apparatus includes an image data generating section for generating image data, and an interpolation image data forming section for forming and outputting interpolation image data based on the image data generated by the image data generating section. The interpolation image data forming section includes a memory for storing the image data generated by the image data generating section.

Data processing apparatus

An image forming apparatus which converts character or pattern information into bit map information (pixel information) and forms an image based thereon. The image forming apparatus includes a light-beam generator for generating a modulated light beam, a light-beam deflector for scanning an image carrier, a device for feeding a sheet to registration rollers and a driver for driving the image carrier. A time period is provided to operate the light-beam deflector and the feeding device before the driver starts to drive the image carrier to form an image.

Image forming apparatus with image carrier and sheet feed drive control

Binary data (VDO) developed to a dot pattern are sequentially stored in line memories (1-9). A processing circuit (43) is constituted by a logic calculation circuit, and determines an edge portion of an image or a halftone image on the basis of 11.times.9 pixel data in shift registers (34-43). When the edge portion of an image is determined, data of a pixel of interest is converted to data that can print a smooth edge portion. Changed data (VDOM) is converted again according to the type of toner. The converted signal is supplied to a laser driver of a printer, and a printing operation is performed by scanning a laser. A resolution setting unit (1700) receives a resolution setting command from an external apparatus (1300), and sets a designated resolution in a printer (1200) according to the resolution setting command. The resolution setting unit (1700) divides one pixel into an optimal number of pixel sections on the basis of the designated resolution, and sets a logic circuit for performing optimal smoothing processing for divided data in a smoothing unit (1018). Bit map development based on code data supplied from the external apparatus (1300), and smoothing processing according to a smoothing logic, are performed.

Image smoothing using selection among plural pre-stored pixel patterns

An information processing method includes inputting bit information, temporarily storing at least part of the input bit information, and detecting whether the stored bit information coincides with one predetermined feature of plural such predetermined features. Print information for an object pixel which corresponds to a stored bit is modified in a case where coincidence is detected. Modification may include, for example, contour retention in a case where a rectangular portion is detected, line width discrimination, or white line discrimination. In addition, second feature detection can determine that a right-angled portion is not involved, in which case print information is modified only if coincidence is detected with plural predetermined features and a right-angled portion is not detected.

Modifying print information based on feature detection

This invention relates to a color image forming apparatus for forming a color image with dry developer, capable of preventing deterioration of image quality, resulting from contamination of optical components by the non-magnetic developer scattered from the developing unit. For this purpose there are provided, along the moving direction of an image bearing member effecting endless movement, charging means, optical means, first developing means utilizing developer containing a magnetic component, second developing means utilizing non-magnetic developer of a color different from that of the developer of the first developing means, and transfer means maintained in contact with or close to the image bearing member for transferring a developed image from the image bearing member to a recording material such as paper. A space containing the second developing means is enclosed by the shape of the first developing means, transfer means and image bearing member.

Image forming apparatus for forming color image with dry developer

An image processing apparatus which generates an output image based on inputted print data, includes a resolution converting device which converts image data corresponding to the inputted print data at a first resolution into image data having a second resolution. The image conversion device includes a plurality of arithmetic processing units each of which performs computations which differ from the others, with one of the plurality of arithmetic processing unit being selected in dependence upon a recording density set for recording the output image. In other aspects, the resolution conversion computation can be input into the device from an external device. In situations where the generated output image is recorded on a pulse-width-modulated device, such as a laser beam printer, it is possible to control the pulse-width based on the density set for recording.

Image processing apparatus

An image forming device suitable for use in a laser beam printer includes an image forming unit for forming an image on a photoconductor, and a reproduction unit for reproducing a high density image and a halftone image on the photoconductor. A detector then detects the density of the high density image and the halftone image formed on the photoconductor. A controller controls an image forming condition of the image forming unit based on a detection result by the detector.

System for correcting a pulse-width-modulated signal in a recording

An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result throughput is increased without causing other problems.

Image forming apparatus with fixer temperature control

An image processing apparatus having an input device for receiving a multivalue image signal, a generating unit for generating a plurality of count clocks, a counting unit for counting the count clocks supplied from the generating unit, a pulse width modulation unit for performing a pulse width modulation by using an output from the counting unit and the multivalue image signal and a selection unit for selecting one count clock from a plurality of the count clocks in accordance with a value of the multivalue image signal.

Image processing apparatus which selects from one of plural generated

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Yokohama, Japan

Hiromichi Yamada