Canon Kabushiki Kaisha

Synthesis Corporation

Jumpei Ashida

Hisashi Ishikawa

Koji Kawamura

Keisuke Takahashi

Kunitoshi Aoki

Shigeru Kameyama

Eric Wai-Shing Chong

Ken Matsui

Ryusuke Miyamoto

A photoelectric conversion device is provided. The device includes a plurality of pixels each including a photoelectric conversion element, a plurality of calculators, and a processor. The plurality of pixels and the plurality of calculators are respectively arranged in a two-dimensional array. For the plurality of pixels, each pixel group of pixel groups composed of not less than two pixels of the plurality of pixels is connected to a corresponding calculator of the plurality of calculators, and each pixel group outputs a spiking signal generated by a pixel in a pixel group of the pixel groups to the corresponding calculator of the plurality of calculators. Each of the plurality of calculators executes calculation for the spiking signal, and the processor processes a calculation result input from each of the plurality of calculators.

Photoelectric conversion device, photoelectric conversion system, equipment, and moving body

A photoelectric conversion device according to an embodiment of the present disclosure includes a calculation unit configured to calculate an initial value of each of a plurality of first correction components based on a first pixel value read out from the first region, update each of the plurality of the first correction components based on a second pixel value read out from the second region and a predetermined second correction component, and calculate the correction value using the updated first correction component and the second correction component.

Photoelectric conversion device, image processing method, imaging system, mobile body, and equipment

A photoelectric conversion apparatus comprising a pixel array and a signal processor is provided. The pixel array is configured to be operable in driving modes in which different signal readout methods are used. The signal processor comprises a selector configured to select, based on the driving mode set for each pixel among the driving modes, a first pixel group and a second pixel group from regions of the pixel array, which have been designated to generate a correction value, a correction value generator configured to generate the correction value in accordance with a first representative value based on signals read out from the first pixel group and a second representative value based on signals read out from the second pixel group, and a corrector configured to correct, based on the correction value, the signal read out from the pixel array.

Photoelectric conversion apparatus, photoelectric conversion system, transport apparatus, and signal processing apparatus

A parameter concerning rotation of a motor is estimated (first estimation). A parameter concerning rotation of the motor is estimated, based on a model representing a prescribed change in a rotation speed of the motor (second estimation). It is determined whether an anomaly has occurred in the rotation of the motor, based on the parameter estimated in the first estimation and the parameter estimated in the second estimation.

Motor control apparatus, image forming apparatus, and control method of motor control apparatus

In order to shorten an activation time while realizing high accuracy motor control, a motor control apparatus operable to control a motor is provided. The apparatus comprises: a first drive control unit configured to drive the motor by forced commutation control; a second drive control unit configured to drive the motor by vector control; and a control unit configured to control to drive the motor by one of the first drive control unit and the second drive control unit. A first control period which is a control period in which the first drive control unit controls the motor is shorter than a second control period which is a control period in which the second drive control unit controls the motor.

Motor control apparatus and method of controlling the same

A rotation speed of a motor is estimated based on a current value of the motor, and rotation control on the motor is performed at a first cycle. Processing for detecting a loss of synchronism in the motor based on the current value is performed at a second cycle that is shorter than the first cycle.

Motor control apparatus, image forming apparatus, and method for controlling motor control apparatus

In an embodiment, an image processing apparatus for performing geometrical transformation of data stored in accordance with two-dimensional coordinate positions includes: a control unit configured to decompose a transformation processing from first coordinates to second coordinates into linear transformation and non-linear transformation, the control unit also being configured to determine transformation parameters for the linear transformation and the non-linear transformation; a linear transformation unit configured to perform the linear transformation of the first coordinates to calculate third coordinates; a non-linear transformation unit configured to perform the non-linear transformation of the first coordinates to calculate fourth coordinates; and a combining unit configured to combine the third coordinates and the fourth coordinates to calculate the second coordinates. The control unit determines the transformation parameters so that a third quadrangle formed by the third coordinates becomes a quadrangle approximate to a second quadrangle.

Image processing apparatus, image processing method, and storage medium

Regarding an image forming apparatus for printing an input image and including a print head having a head sensor configured to sense information from the input image printed on a print medium, there is a method of determining a head sensor position parameter in the image forming apparatus. The method includes printing a first swath of the input image on the print medium and determining the head sensor position parameter by performing a sub-method. The sub-method includes capturing, via the head sensor, a target image from the printed first swath, comparing the target image to a reference image for the first swath based upon the input image, and determining the head sensor position parameter based on a relative shift between the target image and the reference image.

Real-time linefeed measurement of inkjet printer

A control device comprises a driving unit configured to drive a plurality of coils of a multiple-phase motor by pulse width modulation; a detection unit configured to detect currents flowing through the plurality of coils in a time-division manner; and a change unit configured to change, in accordance with a duty in the pulse width modulation, a sequence of detecting the currents flowing through the plurality of coils by the detection unit.

Control device and control method

Disclosed is a method of determining characteristics of a printer, the method comprising the steps of receiving print data, defining dot locations to be printed on a print medium, determining from the dot locations a dot frequency measure reflecting the number of dots to be printed on at least a part of the print medium, forming a simulated reference image of the print data comprising simulated dots corresponding to the dot locations in the print data, determining a size of the simulated dots in the reference image, this size being inversely related to the dot frequency measure, printing the print data on the print medium using the image forming apparatus to form a printed image, and determining characteristics of the image forming apparatus by comparing the printed image and the simulated reference image.

Real-time line feed measurement of inkjet printer

Disclosed is a method of determining line feed error in an image forming apparatus for printing an image, said image forming apparatus comprising a print head having a head sensor configured to sense information from the image printed on a print medium, said method comprising the steps of printing a first swath of the image on the print medium, repositioning the print head relative to the print medium by at least one line feed distance, determining a line feed error based upon information sensed from the printed first swath by the head sensor, and printing, using the determined line feed error, a second swath of the halftone image on the print medium.

Provided is a data communication technique in which overhead is reduced. A data processing apparatus includes a plurality of modules each of which executes data processing; a plurality of routers, which have input ports and output ports, for relaying data transmission among the plurality of modules; and a control unit for outputting a control signal to each of the plurality of routers to thereby control selection of router path. Each of the plurality of routers has a deciding unit for deciding an output port and output timing used in data transmission by utilizing a value of the control signal that has been input thereto.

Data processing apparatus and method of controlling the same

An image processing apparatus according to the present invention comprises an input unit sequentially scanning first image data having first resolution, in units of a predetermined number of pixels that are contiguous in a first direction, in a second direction crossing the first direction at right angles, thereby inputting a pixel group corresponding to each unit of pixels, a computation unit calculating pixel values of second image data having second resolution using pixels in a reference area having a predetermined range in the first image data, a storage unit storing pixel values of a range of the first image data that is larger than the reference area in the first direction, and a control unit controlling the computation unit so as to successively output pixels of the second resolution in the first direction in units of the predetermined number of pixels using the stored pixels.

Image processing apparatus, control method of the same, and program

A method of halftoning of an image comprising a pseudo-noise pattern of dots, whereby vectors between each dot and the nearest neighboring dot are orientated in a direction perpendicular to a line feed direction, and a density of the pattern of dots in a line feed direction is half of a density of the pattern of dots in a direction perpendicular to the line feed direction.

An apparatus capable of dividing an m-value image into a plurality of divided images and performing quantization into an n-value image (2&#x2266;n&#x3c;m) for each divided image includes a first quantization unit for quantizing a first region in the divided image similarly to a region to be joined, and a second quantization unit for sequentially quantizing a second region in the divided image including the first region. If the second quantization unit quantizes the first region, parameters for the quantization processing is corrected using a quantization result in the first quantization unit such that the quantization result approaches the quantization result in the first quantization unit.

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Kawasaki, Japan

Jumpei Ashida