Canon Kabushiki Kaisha

Yuji Hara

Hisashi Ishikawa

Toshiaki Minami

Yusuke Yamamoto

Hayao Ohzu

Akihiro Fujimoto

Tatsuhiko Yamazaki

Akitoshi Yamada

Masao Kato

Naoki Sumi

Shinichi Miyazaki

Hirowo Inoue

Takeo Kimura

Kenta Hosaki

Akinobu Mori

An image processing apparatus that generates a halftone image by quantizing an input image includes: a holding unit configured to hold a threshold value matrix in which different threshold values are arranged; a pixel position determination unit configured to determine a candidate of a pixel position whose threshold value is to be rewritten based on each pixel value of a plurality of pixels included in a predetermined area for the predetermined area in the input image; and a threshold value determination unit configured to determine a threshold value of the pixel position determined to be the candidate by using at least one threshold value of a plurality of threshold values corresponding to the predetermined area.

Image processing apparatus, image processing method, printing medium and storage medium

Screen processing is performed on input image data. A boundary pixel adjacent to a white pixel in the input image data is detected. Output image data based on either the input image data or the screen-processed image data is selectively output for each pixel in accordance with the detection result of the boundary pixel.

Performing halftone processing using intra-cell sum value differences applied so as to correct boundary pixels

Multi-value image data is sampled for each predetermined pixel range to generate tone information of the pixel range. The generated tone information is stored in a storage unit. Attribute information representing the attribute of a pixel is generated from the multi-value image data, and the generated attribute information is stored in the storage unit. Halftone processing is performed on the multi-value image data based on the tone information and attribute information stored in the storage unit.

Image processing apparatus and method thereof

An input control apparatus, which accepts input of data from the outside and inputs the data to a bus in a data processing system in which a plurality of communication units are connected by the bus in a ring shape and data processed by processing units are delivered via the bus, controls acceptance of data based on the number of data items which should be output outside, are suspended from output, and remain on the bus.

Data processing apparatus, input control apparatus, and control method

There is provided an information processing apparatus including a plurality of communication units connected to one another in a ring shape by a bus, each of the plurality of communication units being connected to one of processing units, each of which executes a predetermined process, and transmitting data processed by the one of the processing units to the bus as a packet, the information processing apparatus transferring data between the processing units and processing the data in a predetermined order. Among the plurality of communication units, in at least one communication unit, a packet including a value indicative of suspension of the process is generated when the connected processing unit has suspended a process, and information showing whether or not the generation unit has generated the packet including the value indicative of suspension of the process is stored.

Information processing apparatus, communication method and storage medium

The invention relates to an information processing apparatus, which comprises a plurality of communication units connected to a bus in a ring shape. At least one of the plurality of communication units extends a transmission interval when it is determined that the processing unit, which is to execute the next process for received data, is the processing unit, which executes the process after the processing unit corresponding to the at least one of the plurality of communication units, and when it is detected that the process for the received data is suspended.

Packet processing in a predetermined order and suspension of packet transmission by predetermined time intervals based on a suspension flag

A data processing apparatus includes a data input unit configured to input data to a ring bus, a data output unit configured to output the data input by the input unit, a first communication processing unit configured to control input of the data by the data input unit to the ring bus and to control output of the data by the data output unit, a plurality of data processing units configured to perform data processing, a plurality of second communication processing units configured to control transmission and reception of the data between the plurality of data processing units and the ring bus, and a control unit configured to independently perform initialization on the plurality of second communication processing units or the plurality of data processing units.

Data processing apparatus and data processing method

A data processing apparatus can reduce an occupancy rate of a ring bus by suppressing occurrence of a stall packet, and can change a processing sequence. In the data processing apparatus, a buffer is provided in each communication unit connecting the ring bus and the associated processing unit. Transfer of data from the communication unit to the processing unit is controlled by an enable signal. Consequently, occurrence of a stall packet is suppressed. Accordingly, frequency of occurrence of a deadlock state is reduced by decreasing the occupancy rate of the ring bus.

Apparatus, method, and medium for controlling transmission of data

There is provided an image processing apparatus comprising: a first halftone processing unit configured to perform halftone processing on multilevel input image data; a first filter unit configured to perform smoothing filter processing on the first halftone image data; a second filter unit configured to perform smoothing filter processing on the multilevel input image data; a first difference evaluation unit configured to calculate a difference between the converted first and second filter-processed data for each pixel as a first moir&#xe9; intensity; a third filter unit; a fourth filter unit; a second difference evaluation unit configured to calculate a difference between the converted third and fourth filter-processed data for each pixel as a second moir&#xe9; intensity; and a moir&#xe9; intensity selection unit configured to select one of the first moir&#xe9; intensity and the second moir&#xe9; intensity.

Image processing apparatus, image processing method and storage medium

An image processing apparatus comprises a plurality of processing blocks connected in series, and each respective processing block comprises a processor. In each respective processing block, the processor employs data input into that processing block to perform an image process upon the data. Also, each processing block performs a process upon the processor in response to a command input into the processing block. Each processing block causes an output corresponding to the command that is input after the data to wait until an output of the processor that employed the data input into the processing block prior to the command to perform the process is finished, such that the output of the processor that employed the data to perform the image processing and the output that corresponds to the command is outputted from the processing block in an order whereby the data and the command are input.

Image processing method and apparatus for synchronized input and output of data and commands

An image processing apparatus has a plurality of serially connected image processing blocks for sequentially processing image data input thereto. After a first command for controlling the plurality of image processing blocks and image data to be processed by the plurality of image processing blocks are output to the leading image processing block, a second command indicating end of this output is output to the leading image processing block. When the second command is output from a final image processing block, the next first command and image data are output to the leading image processing block.

Image processing method and apparatus

The invention provides a decoding apparatus which guarantees a decoding speed of a predetermined unit. To this end, the decoding apparatus includes a shifter which detects a start bit of a codeword from coded data, a table which stores decode values of a plurality of symbol data at one address, a table which is used to store a shift amount of the shifter, a table which generates a data length of the decode values of the plurality of symbol data, a decoder which is used to generate an address of the first table from the coded data, a decoder which is used to generate an address of the second and third tables from the coded data, and a packer which couples or separates the decoded values of the plurality of symbol data to data for the predetermined fixed number of bits.

Decoding apparatus and control method thereof

A parametric curve generating device for developing a Bezier curve is provided. The device is capable of executing a high speed division operation with a limited magnitude of hardware scale. Adders perform calculations that are stored in registers. Convergence discrimination circuits discriminate whether data stored in the registers converge. Subsequent processing varies depending on the discrimination result. A stack memory is used to store data from the registers.

Parametric curve generating device generating a Bezier curve for font

A minimum coordinate value at least in one direction of a parameter data group including a start point and an end point of a stroke is detected and outline coordinates are generated from the parameter data group by an outline coordinate generator and a minimum coordinate detector. An outline data generator stores range data indicative of a painting range into a predetermined address in an outline buffer on the basis of the outline coordinates and the minimum coordinate value or the maximum coordinate value. An address generator generates a drawing start address and an end address in a bit map memory in accordance with a value based on the minimum coordinate value and the predetermined address and with the range data. A painter paints by writing the same value into all data between the drawing start address and end address in the bit map memory, thereby generating a character pattern at a high speed by a buffer memory of a small capacity.

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Machida, Japan

Yuji Hara