A system for dark current compensation in SPAD imagery is configurable to capture an image frame with the SPAD array and generate a temporally filtered image by performing a temporal filtering operation using the image frame and at least one preceding image frame. The at least one preceding image frame is captured by the SPAD array at a timepoint that temporally precedes a timepoint associated with the image frame. The system is also configurable to obtain a dark current image frame. The dark current image frame includes data indicating one or more SPAD pixels of the plurality of SPAD pixels that detect an avalanche event without detecting a corresponding photon. The system is also configurable to generate a dark current compensated image by performing a subtraction operation on the temporally filtered image or the image frame based on the dark current image frame.

A system for dark current compensation in SPAD imagery is configurable to capture an image frame with the SPAD array and generate a temporally filtered image by performing a temporal filtering operation using the image frame and at least one preceding image frame. The at least one preceding image frame is captured by the SPAD array at a timepoint that temporally precedes a timepoint associated with the image frame. The system is also configurable to obtain a dark current image frame. The dark current image frame includes data indicating one or more SPAD pixels of the plurality of SPAD pixels that detect an avalanche event without detecting a corresponding photon. The system is also configurable to generate a dark current compensated image by performing a subtraction operation on the temporally filtered image or the image frame based on the dark current image frame.

A radiographic imaging system includes a radiographic detector having a scanning device to obtain patient identifying information. The detector is programmed to display the patient identifying information in human readable form and to access additional information about the patient stored in networked databases.

A selection pixel where signal readout is performed and a reference pixel where signal readout is not performed are arranged in a pixel array section, and an amplification transistor of the selection pixel and an amplification transistor of the reference pixel each source electrode of which is connected in common to a common wire are connected with a constant current source via the common wire to form a differential amplification circuit. Then, a bypass control section which selectively establishes connection between the constant current source and a differential output node of the differential amplification circuit and limits a voltage of the differential output node to a predetermined voltage by causing a bypass current to flow between the constant current source and the differential output node, and a current path for bypass current that supplies the bypass current to the constant current source through the pixel array section are included.

An image sensing device includes a first test block, a second test block, and a readout block. The first test block includes a plurality of first image sensing pixels structured to convert incident light carrying an image into a first pixel signal indicative of the image, and a first heating element structured to transmit heat to the first image sensing pixels. The second test block includes a plurality of second image sensing pixels that each include a light blocking structure to be shielded from receiving incident light to generate a second pixel signal without being directly exposed to the incident light, and a second heating element structured to transmit heat to the second image sensing pixels. The readout block processes the first pixel signal output from the first test block and the second pixel signal output from the second test block.

An image sensor includes a first voltage source that supplies a first voltage and a plurality of pixels supplied with the first voltage. The pixel includes a photoelectric conversion unit that photoelectrically converts incident light, an accumulation unit to which an electric charge resulting from photoelectric conversion by the photoelectric conversion unit is transferred and accumulated, a transfer unit that transfers the electric charge from the photoelectric conversion unit to the accumulation unit; a second voltage source that supplies a second voltage, and a supply unit that supplies the transfer unit with a transfer signal based on either the first voltage supplied by the first voltage source or the second voltage supplied by the second voltage source.

Methods and apparatus for using a controllable filter, e.g., an liquid crystal panel, in front of a camera are described. The filter is controlled based on the luminosity of object in a scene being captured by the camera to reduce or eliminate luminosity related image defects such as flaring, blooming or ghosting. Multiple cameras and filters can be used to capture multiple images as part of a depth determination processes where pixel values captured by cameras at different locations are matched to determine the depth, e.g., distance from the camera or camera system to object in the environment. Pixel values are normalized in some embodiments based on the amount of filtering applied to a sensor region and sensor exposure time. The filtering allows for regional sensor exposure control at an individual camera even though the overall exposure time of the pixel sensors may be and often will be the same.

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.

To control an excess bias to an appropriate value in a light detection device. A solid-state image sensor includes a photodiode, a resistor, and a control circuit. In this solid-state image sensor, the photodiode photoelectrically converts incident light and outputs a photocurrent. Furthermore, in the solid-state image sensor, the resistor is connected to a cathode of the photodiode. Furthermore, in the solid-state image sensor, the control circuit supplies a lower potential to an anode of the photodiode as a potential of the cathode of when the photocurrent flows through the resistor is higher.

An imaging apparatus including: an image sensor unit; and a camera unit from which the image sensor unit is detachable, in which the image sensor unit includes at least an image sensor and a first storage unit in which first correction data are stored, the camera unit includes at least a control unit, and the control unit performs an update determination process for determining whether or not the first correction data stored in the first storage unit have been updated.