Canon Kabushiki Kaisha

Yoshinobu Mita

Junichi Shishizuka

Susumu Sugiura

Miyuki Enokida

Yoshihiro Ishida

Naoto Kawamura

Makoto Takaoka

Shigetada Kobayashi

Mitsumasa Sugiyama

Osamu Yamada

Kazuhiro Saito

Yoshikazu Yokomizo

Yasuo Fukuda

Masanari Toda

Yukari Toda

Tsutomu Negishi

Yasuhiko Hashimoto

Tadashi Yoshida

Yoshinori Ikeda

Shunichi Abe

Kentaro Matsumoto

Kimiyoshi Hayashi

Nobuo Matsuoka

Hiroyuki Nakanishi

Yoji Kaneko

Katsuhito Dei

Katsutoshi Hisada

Toyokazu Uda

Yukari Shimomura

Mitsuo Akiyama

Tadayoshi Nakayama

Hidefumi Osawa

Yuji Nishigaki

Ken Onodera

Yoshizumi Yasuda

Yasufumi Emori

Kazuhiko Onuma

Tadataka Koga

There is disclosed a control apparatus for a scanner/printer including a unit for generating print data described in a page description language, a unit for generating a command regarding a scanner for scanning an original image, and a unit for producing the print data and the command regarding the scanner to a common device through a network.

Control apparatus for a scanner/printer

An analyzer estimates the time for rendering image data based on the number, types, etc., of rendering commands, stored in an intermediate memory, and determines whether or not there is a possibility of overrun. If there is the possibility of overrun, image data of respective bands formed in a band buffer are sequentially compressed and stored into a compressed image memory. When the image data for one page has been stored, the data in the compressed image memory is sequentially expanded and supplied to a printer engine. This avoids failure of image output due to overrun, while reducing the capacity of the image memory.

Image processing apparatus and method

An image processing apparatus is composed of an image memory comprising a plurality of memory elements, and a processor unit comprising a plurality of processor elements. By suitably engineering the arrangement of the image memory of memory elements, the arrangement of the processor unit of processor elements and the connections among the memory elements and processor elements, it is possible to realize, through a simple construction, high-speed image processing such as image density conversion, image color conversion, image masking, image spatial filtering, image enlargement, image reduction, image rotation, image compression, image extension and image color correction. Also provided are an image processing apparatus for a color image, composed of a plurality of image memories and a plurality of processor elements, and a generalized, multifunctional data parallel processing apparatus capable of processing a large volume of data at high speed.

Image processing system having multiple processors for performing parallel image data processing

An input/output apparatus is connected to a plurality of host computers via a network and executes both a scanning function and a printing function. The apparatus includes a portion that generates image data from data input from a first one of the host computers and prints the generated image data by executing the printing function, and further includes an output device that scans image data by executing the scanning function and outputs the scanned image data to a second one of the host computers in response to a request command. As a result, the input/output apparatus may operate in coordination with a plurality of personal computers by using the network to transfer image data therebetween.

Input/output apparatus connected to a plurality of host computers via a network

In a neural network which includes one input layer, one or more intermediate layers and one output layer, neural elements in the input layer and neural elements in the intermediate layer are divided into groups. Arithmetic operations representing the coupling between the neural elements of the input layer and the neural elements of the intermediate layer are put into table form.

Data processing using neural networks having conversion tables in an intermediate layer

An image processing method is disclosed in which a pattern for detecting a line image is compared with the value of image data within a predetermined window of the original image. N-value data is transformed to M-value data based on the result of this comparison. An image can thus be satisfactorily M-value coded without being adversely affected by noise.

Image processing with conversion from N-value to M-value data

A system enables the reading characteristic of an image reader in a network to be recognized by a host computer. The SP server device transfers the reading characteristics of a plurality of scanner printers to a designated client host computer and through a network.

Server device and image processing device

An image processing method converts an N-value image into an M-value image (N&lt;M). The method obtains an appearance frequency distribution of M-value image data corresponding to a predetermined N-value pattern around an objective pixel of N-value image data, to which an M-value image (M&lt;N) is converted, for each of N-value patterns different from each other. The method then estimates M-value image data corresponding to a given N-value image on the basis of the appearance frequency distribution.

Method and apparatus for converting N-value image to M-value image, for  &lt;

There is disclosed an information input/output control device and a method therefor which displays a list of identification informations indicating an information terminal device with which a functional operation can be executed in response to an acquired environmental information of the information terminal device and in accordance with an input of an indication information which instruct to execute the functional operation.

Information input/output control apparatus and method for indicating

Disclosed are an image processing method and apparatus whereby the capability of coding/decoding processing accompanied by learning is improved, this also making it possible to achieve high-speed image formation processing without error. The apparatus includes a coder for generating coded data by arithmetically coding image data, a counter for counting the number of times learning is performed by the coder, and a comparator which, when a count recorded by the counter attains a value stored in a register, stops the learning operation executed by the coder.

Image compression by arithmetic coding with learning limit

A scan converting method of converting image data from a raster sequence scan to a block sequence scan to divide the image data into blocks each having predetermined vertical width and lateral width and converting the image data from the block sequence scan to the raster sequence scan. One block buffer having a size in which a vertical width is set to the vertical width of the block and a lateral width is set to the horizontal width of the raster is used. Raster data by the raster sequence scan is written into the block buffer. The block data by the block sequence scan is read out. The block data is written and the raster data is read out. Upon conversion from the raster sequence scan to the block sequence scan, the block buffer is read out by the block sequence scan, the raster data is written into empty addresses which are caused by the reading, and the read address by the next block sequence scan is obtained by a predetermined arithmetic operation on the basis of the order of writing. Upon conversion from the block sequence scan to the raster sequence scan, the block buffer is read out by the raster sequence scan, the block data is written into empty addresses which are caused by the reading, and the read address by the next raster sequence scan is obtained by a predetermined arithmetic operation on the basis of the order of writing.

Scan converting method and apparatus for raster to block and block to

An image processing method and apparatus for converting image data for use in a color CRT and an image processing device each having a different color reproducible range, for example, a color printer. Color component data of color image data corresponding to a most parts of a color reproducible range of the color printer having a color reproducible region which is narrower than that of the color CTR is not converted. The hue and the brightness of color component data of color image data exceeding the color reproducible range of the color printer are not substantially converted but only chromaticness is converted. A part deviated from the color reproducible range can be approximated to the outer periphery of the reproducible range. Furthermore, the most part of the color reproducible range is correctly color-reproduced and the color image is converted so as to make a portion of the same to be a compressed space of an all color space. Therefore, a color image can be converted such that a color image can be reproduced while maintaining color continuity even if the color deviates from the color reproducible range of the color printer.

Color image processing method and apparatus therefor

There is disclosed an information device and an information processing method which determine whether a control code constituting a document information is processable or not, transfer the document information to the other information processing device connected with the information processing device when the control code was determined to be unprocessable, and has the other information processing device executed as proxy for the original information processing device to produce an output information from the document information.

Information processing device and information processing method

A decoding apparatus includes a first decoder for performing decoding by dividing first coded data consisting of a bit sequence into divided data each having a bit length of 1 bit or more, and a second decoder which performs decoding on the basis of the '1' or '0' run length and the remaining bit string of second coded data consisting of a bit sequence, and shares at least a circuit portion with the first decoder.

Decoding apparatus and method for coded data

The invention concerns a color image communication apparatus, which comprises scan conversion means for converting n-level image data received in a raster scan system via a communication line to data in a shuttle scan system, multi-level conversion means for converting color n-level data obtained from the scan conversion means for multi-level data, and color conversion means for converting color characteristics of multi-level data obtained from the multi-level conversion means from color characteristics for a communication line to color characteristics of output color recording means. The invention also concerns a color image communication apparatus, which comprises means for generating shuttle system color signal, color conversion means for converting the color signal to signal matched to standard color characteristics for a communication line, n-level conversion means for converting the converted color signal from the color conversion means to n-level signal, and means for performing data scan conversion of the n-level data from shuttle scan system to raster scan system and sending out the raster scan system n-level data to the communication line.

Growing community of inventors

Kawasaki, Japan

Yoshinobu Mita