Canon Kabushiki Kaisha

Hiroshi Atobe

Kaoru Seto

Hiroshi Mano

Takashi Kawana

Tetsuo Saito

Atsushi Kashihara

Hiromichi Yamada

Hiroshi Sasame

Masaki Ojima

Masaharu Ohkubo

Seiji Uchiyama

Michio Itoh

Hisashi Ishikawa

Akihiko Takeuchi

Koichi Honma

Daisuke Murata

Satoshi Nagata

Makoto Takeuchi

Yoji Serizawa

Kazuro Yamada

Takashi Soya

Michio Ito

Akio Noguchi

Yukihide Ushio

Atsushi Shoji

Toshio Yoshimoto

Yoichi Toyokura

Kiyoshi Kanaiwa

Maiko Suenaga

A dot pattern is generated by using scalable font data on the basis of received print data, and then printed. One scalable font set corresponds to two kinds of dot pattern generating modes. One generates a dot pattern with quality being given precedence, and the other generates a dot pattern with speed being given precedence and for printing at high speed, though quality inferior. The two modes are switchable to perform printing to fit user's needs.

Image recording apparatus and control method thereof

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 processing apparatus and method in which plural gradation-information storage units are provided, and at least one of those units is selected to store a given body of gradation information based on command information, such as resolution information. The different units store gradation information in different forms, e.g., compressed and uncompressed.

Discriminating an image data characteristic and controlling storage of

An image processing apparatus includes an input device for inputting code, and a conversion device for converting the input code information to pixel information. An output device outputs the pixel information generated by the conversion device to a print unit which is capable of variably adjusting a printing resolution in a predetermined range. A specification device specifies a resolution at which an image corresponding to the input code information is to be printed, in accordance with the input code information. A setting device sets the printing resolution of the print unit as one of positive integer multiples of the specified resolution in the predetermined range.

Image processed apparatus for processing images having different

An image processing apparatus and method in which plural gradation-information storage units are provided, and at least one of those units is selected to store a given body of gradation informatin based on command information, such as resolution information. The different units store gradation information in different forms, e.g., compressed and uncompressed.

Image processing method and apparatus

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

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

A multivalued input recording signal is subjected to pulse-width modulation at a time unit shorter than the period of a clock signal within the period of the recording signal. Alternatively, the multivalued input recording signal is converted into a plurality of different signals each of whose length of time is shorter than a clock signal within the period of the recording signal, thereby performing pulse-width modulation in accordance with a predetermined weighting. This makes it possible to obtain a highly toned recording signal without raising the frequency of the clock signal. Further, density tone data is generated in dependence upon inputted multivalued pixel data, and control is performed using both the irradiation time and emission intensity of a light beam based on the generated density tone data. An image is formed by irradiating a photosensitive body with the controlled light beam.

Image forming apparatus, and modulating method therein

A multivalued input recording signal is to pulse-width modulation at a time unit shorter the period of a clock signal within the period of the recording signal. Alternatively, the multivalued input recording signal is converted into a plurality of different signals each of whose length of time is shorter than a clock signal within the period of the recording signal, thereby performing pulse-width modulation in accordance with a predetermined weighting. This makes it possible to obtain a highly toned recording signal without raising the frequency of the clock signal. Further, density tone data is generated in dependence upon inputted multivalued pixel data, control is performed using both the irradiation time and emission intensity of a light beam based on the generated density tone data. An image is formed by irradiating a photosensitive body with the controlled light beam.

Image processing method and apparatus having high tone quality

There is disclosed an electronic apparatus in which signal transmission, for example a command signal from a control unit or a detection signal from a detector, is conducted by light from an emitting unit to a receiving unit. This eliminates signal transmission by cables, thus avoiding complicated wiring operations, preventing noises and reducing the volume of the apparatus.

Electronic apparatus with light communication

A recording apparatus includes a receiving unit for receiving an image signal sent from an external apparatus, and a recording unit for performing a recording operation in accordance with the image signal received by the receiving unit. The receiving unit includes a clock signal generating unit for generating a clock signal used when receiving the image signal; and includes a first reception mode where the image signal is received without using the clock signal and a second reception mode where the image signal is received by using the clock signal. The receiving unit may include a first reception mode where the image signal is received by using a clock signal sent from the external apparatus and a second reception mode where the image signal is received without using the clock signal. The receiving unit may include a clock signal generating unit for generating a clock signal used when receiving the image signal, a first reception mode where the image signal is received in accordance with the clock signal sent from the external apparatus and a second reception mode where the image signal is received by sending the clock signal generated by the clock signal generating unit to the external apparatus.

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Yokohama, Japan

Hiroshi Atobe