H04N25/30

Decorrelated channel sampling for digital imaging

In association with an imaging device which generates a portion of an image from a plurality of channels within a first row by sampling each channel during a sampling time corresponding to the channel, circuitry offsets sampling times of at least first and second channels within the first row, thereby reducing noise correlation between the first and second channels in the first row. Pixel sampling times may be defined by start times of the channels within a row, end times or both. Offsetting may be accomplished using a predetermined set of sampling time values or by randomizing sampling time values. Offsetting pixel sampling times of channels within a row relative to each other decorrelates channel sampling because different phases of the noise signal are sampled on each channel, effectively blurring or dithering the channel noise within each row. Random sampling within the channel, such as by varying a channel sampling time between rows, further dithers the noise within each channel. Undesirable correlated noise effects are reduced as a result.

RADIATION IMAGING SYSTE
20180295294 · 2018-10-11 ·

A radiation imaging system includes a two-dimensional array in which a plurality of elements which detect radiation are two-dimensionally arrayed. The plurality of elements includes a plurality of detectors usable for exposure control of stopping radiation irradiation in accordance with a fact that a radiation irradiation dose has reached a target irradiation dose. The radiation imaging system includes a controller configured to determine, based on a setting of a reading manner of signals from the plurality of detectors, a minimum irradiation time required from the start of radiation irradiation until the stop of radiation irradiation according to signals from the two-dimensional array and perform an error process when the minimum irradiation time exceeds a reference irradiation time.

Image sensor and method for improving readout speed

The present invention provides an image sensor comprising: pixels arranged along a plurality of row lines and column lines in a matrix form; a scan driving unit for selecting the row lines in the unit of n lines in a binning mode; and a read circuit unit for outputting n*m binning signals generated by sampling n*1 signals output in every column line according to the selection of the row lines and averaging the sampled n*1 signals in the unit of m neighboring column lines, wherein each of n and m is a natural number larger than or equal to 2.

Solid-state imaging device

A solid-state imaging device comprises a photodetecting section, an unnecessary carrier capture section, and a vertical shift register. The unnecessary carrier capture section has carrier capture regions arranged in a region between the photodetecting section and the vertical shift register for respective rows. Each of the carrier capture regions includes a transistor and a photodiode. The transistor has one terminal connected to the photodiode and the other terminal connected to a charge elimination line. The charge elimination line is short-circuited to a reference potential line.

RADIOGRAPHIC IMAGING APPARATUS

A radiographic imaging apparatus includes a sensor board including a flexible substrate, and a plurality of pixels that are provided on a first surface of the substrate to accumulate electrical charges generated in accordance with light converted from radiation. Additionally, the radiographic imaging apparatus includes flexible cables having one ends electrically connected to the sensor board and the other ends provided with connectors, and flexible cables on which signal processing circuit parts are mounted and which are connected electrically to the cables by the one ends thereof being electrically connected to the connectors. Additionally, the radiographic imaging apparatus includes flexible cables having one ends electrically connected to the sensor board and the other ends provided with connectors, and flexible cables on which drive circuit parts are mounted and which are connected electrically to the cables by the one ends thereof being electrically connected to the connectors.

X-RAY IMAGE ACQUISITION DEVICE AND X-RAY IMAGE ACQUISITION SYSTEM

An X-ray image acquisition device includes a pixel unit having M pixel arrays each including N pixel portions (N and M are integers of 2 or more), M circuit units, and a control unit. Each circuit unit includes T (T is an integer of N or more) adding sections that sequentially add electrical signals corresponding to output signals from the N pixel portions and a switch section for switching connection states between the N pixel portions and the T adding sections. The control unit switches the connection states in synchronization with the transportation of an object along a first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.

X-RAY IMAGE ACQUISITION DEVICE AND X-RAY IMAGE ACQUISITION SYSTEM

An X-ray image acquisition device includes a pixel unit having M pixel arrays each including N pixel portions (N and M are integers of 2 or more), M circuit units, and a control unit. Each circuit unit includes T (T is an integer of N or more) adding sections that sequentially add electrical signals corresponding to output signals from the N pixel portions and a switch section for switching connection states between the N pixel portions and the T adding sections. The control unit switches the connection states in synchronization with the transportation of an object along a first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.

METHODS OF OPERATION OF IMAGE SENSOR

Disclosed herein is a method comprising: sending radiation pulses (i), i=1, . . . , M one by one toward an object and toward an image sensor as the image sensor moves nonstop in a first direction with respect to the object; and for each value of i, capturing with the image sensor a partial image (i) of the object using radiation of the radiation pulse (i) that has transmitted through the object. The image sensor comprises N active areas. Each active area of the N active areas comprises multiple sensing elements. For each value of i, the radiation pulse (i) has a pulse duration during which the image sensor travels a distance shorter than a width measured in the first direction of any sensing element of the image sensor. M and N are integers greater than 1.

METHODS OF OPERATION OF IMAGE SENSOR

Disclosed herein is a method comprising: sending radiation pulses (i), i=1, . . . , M one by one toward an object and toward an image sensor as the image sensor moves nonstop in a first direction with respect to the object; and for each value of i, capturing with the image sensor a partial image (i) of the object using radiation of the radiation pulse (i) that has transmitted through the object. The image sensor comprises N active areas. Each active area of the N active areas comprises multiple sensing elements. For each value of i, the radiation pulse (i) has a pulse duration during which the image sensor travels a distance shorter than a width measured in the first direction of any sensing element of the image sensor. M and N are integers greater than 1.

IMAGING SYSTEM WITH NOISE REDUCTION

Embodiments include applying a first pulse to a first gate line of a plurality of gate lines of an imaging array; applying a second pulse to other gate lines of the plurality of gate lines while applying the first pulse, the second pulse having a polarity opposite to the first pulse; and sampling pixels coupled to the first gate line while applying the first pulse using sampling circuits.