Canon Kabushiki Kaisha

Other

Hidehiko Saito

Kazumasa Matsumoto

Takashi Yamazaki

Kanako Dowaki

Yuichi Naito

Hirokazu Sada

Hidehito Takayama

Shigeo Kobayashi

Kenichi Suzuki

Hiroaki Niwa

Satoshi Shimizu

Keiji Okoda

A radiation imaging apparatus is provided. The apparatus comprises: an imaging unit including a plurality of pixels configured to convert incident radiation into an electrical signal; a storage unit configured to store position information of a first pixel, among the pixels, which always outputs an abnormal pixel value; a correction unit configured to detect a second pixel, among the pixels, which is not stored in the storage unit and outputs an abnormal pixel value, and correct the pixel value of the second pixel; and an interpolation unit configured to, after image data output from the imaging unit is processed by the correction unit, generate a pixel value of the first pixel based on the position information and a pixel value of a pixel, among the pixels, which is arranged near the first pixel.

Radiation imaging apparatus, radiation imaging system, method of controlling radiation imaging apparatus, and non-transitory computer-readable storage medium

A radiation imaging apparatus, comprising a sensor array in which a plurality of sensors are arranged, each includes a first holding unit for holding a first signal obtained with a first sensitivity and a second holding unit for holding a second signal obtained with a second sensitivity, a row selecting unit for selecting each sensor on a row basis, a signal readout unit for reading out a signal from each of the selected sensors, and a control unit configured to perform first control to control the sensor array so as to make the first holding units hold the first signals and make the second holding units hold the second signals, and perform second control to control the row selecting unit so as to make the signal readout unit read out the first and the second signals.

Radiation imaging apparatus and radiation inspection apparatus

A radiation imaging apparatus includes: a radiation detection unit in which a plurality of photoelectric conversion units to convert radiation signals into charge signals and store the charge signals is located; a storage control unit configured to control the storage of the charge signals executed by the plurality of photoelectric conversion units; a reading control unit configured to control reading of the charge signals stored by the plurality of photoelectric conversion units; and a control unit configured to fix an indefinite potential generated at the radiation detection unit while at least one of the storage control of the charge signals by the storage control unit and the reading control of the charge signals by the reading control unit is not carried out.

Radiation imaging apparatus and control method thereof

A radiation imaging apparatus including an accumulation unit to accumulate electrical charge in accordance with radiation for each pixel circuit of a plurality of pixel circuits. An output unit outputs an analog signal for each pixel circuit by sampling and holding an electrical signal in accordance with a voltage of an accumulation unit for each pixel circuit. The output unit stops the output during a reset operation of the accumulation unit. A selection unit selects pixel circuits that output the analog signals. The selection unit stops the selection during a reset operation of the accumulation unit. A determination unit determines whether a total time of an exposure time and an output time required to output the analog signals corresponding to all the pixel circuits is longer than an imaging interval that is based on a synchronization signal representing a radiation generation timing input from an external apparatus.

Radiation imaging apparatus, control method for radiation imaging apparatus, and storage medium

Radiation imaging apparatus including radiation detection unit having a plurality of photoelectric conversion units, and control method therefor

A radiation imaging apparatus includes an imaging unit and an imaging control unit. The imaging control unit causes a switch unit, an accumulation unit, a removal unit, a holding unit, and an addition unit, which constitute a pixel circuit of the imaging unit, to operate at a timing before an imaging operation by the imaging unit so as to fix unstable voltages of the accumulation unit, the removal unit, the holding unit, and the addition unit to a predetermined voltage of a power supply connected via a switch unit.

Radiation imaging apparatus and control method for radiation imaging apparatus

An imaging apparatus including: a plurality of pixels including a photoelectric conversion element and a sample hold circuit; a plurality of signal lines configured to read from the plurality of pixels an electric signal held in the sample hold circuit therein; a imaging control unit configured to perform a first control for applying the held electric signal to the plurality of signal lines, and a second control for sequentially applying to the signal lines the electric signal obtained corresponding to light received by each of the plurality of pixels and reading the electric signal, after the first control has been performed; and a generation unit configured not to create image data based on the electric signal applied to the signal line by the first control but to create the image data based on the electric signal read via the signal line by the second control.

Imaging apparatus, radiation imaging system, and control method of image sensor

A flat panel sensor control unit reads image data from each region formed by dividing a flat panel. A write access control unit writes the image data read by the flat panel sensor control unit in a frame memory. A read access control unit starts reading the image data from the frame memory in response to that the writing of the image data to the frame memory becomes a predetermined state.

Imaging apparatus, control method thereof, and program

When data to be output in accordance with a predetermined protocol and attached information of the data are input in setting output conditions of an output apparatus capable of setting a plurality of output parameters, information concerning output of the data is detected from the attached information. An output parameter is selected in accordance with the detected information, and the data is converted in accordance with the selected output parameter. This reduces operations by a user, so an appropriate output corresponding to the data can be obtained without any expert knowledge. This invention is applicable to, e.g., an output system for printing medical images.

Method of setting output conditions of output apparatus, output system, and printing apparatus

A plurality of ink-jet head units, each having ink with different density in a color, are prepared. Superimposed print information of a plurality of the types of ink, each having different density, is stored as an ink type distribution table in correspondence with the density of image data. An increase in ink density in each nozzle is predicted on the basis of a continuous ink non-discharging count (non-discharging time) stored in an ink density characteristics change table. Binary data for determining an optimal ink type distribution for recording the image data, i.e., ink-jet head units to be used for printing, are generated by referring to the predicted value and the ink type distribution table. Printing is then performed. In addition, the density value of the target pixel to be printed is predicted. The error between the predicted density value and the density value of the original pixel is distributed to the pixels around the target pixel to convert the image data, thereby printing an image on the basis of the resultant image data.

Growing community of inventors

Saitama, Japan

Hidehiko Saito