A radiation imaging apparatus includes a detection unit configured to detect radiation emitted from a radiation irradiation unit, the apparatus comprises a processing unit configured to obtain dose distribution information regarding the radiation with which the detection unit is irradiated from the radiation irradiation unit. The processing unit corrects, using the dose distribution information, an image signal output from the detection unit.

A focus detection apparatus comprising: a focus detection unit that detects an in-focus position using an image signal obtained by an image sensor photoelectrically converting light that has entered via an imaging optical system; a first acquisition unit that acquires aberration information of the imaging optical system; a generating unit that generates a recording image using the image signal; a calculation unit that calculates, on the basis of the aberration information, a correction value for correcting a difference between the in-focus position detected by the focus detection unit and a position to be focused on in the recording image; and a correction unit that corrects the in-focus position using the correction value. The calculation unit calculates the correction value on the basis of information of a display unit that displays an image based on the image signal.

A focus detection apparatus, comprising, focus detection pixels that receive a pair of light fluxes resulting from pupil division of light flux, a memory that stores correction values in accordance with width of the imaging light flux in the pupil-division direction relating to a two-image interval value, and a controller having a focus detection section, a light flux width calculation section, and a defocus amount calculation section, wherein the light flux width calculation section calculates the width of the imaging light flux in the pupil-division direction, and the defocus amount calculation section calculates defocus amount of the photographing optical system based on the two-image interval value, wherein the focus detection section detects a first two-image interval value and corrects the first two-image interval value based on the correction values and the width of the imaging light flux in the pupil-division direction to obtain a second two-image interval value.

According to an embodiments of the disclosure, electronic device comprise: a lens assembly including a plurality of lenses aligned along an optical axis direction from an object side to an image side and including a first lens having a convex surface in a first direction parallel to the optical axis direction and toward the object; a second lens having a convex lens in the first direction; a third lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens; and an image sensor including an imaging plane configured to form an image. The electronic device may be implemented as a compact and high-resolution optical device. The lens assembly may be diversified according to embodiments, and other various lens assemblies and electronic devices with the same may be provided, according to various embodiments.

According to an embodiments of the disclosure, electronic device comprise: a lens assembly including a plurality of lenses aligned along an optical axis direction from an object side to an image side and including a first lens having a convex surface in a first direction parallel to the optical axis direction and toward the object; a second lens having a convex lens in the first direction; a third lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens; and an image sensor including an imaging plane configured to form an image. The electronic device may be implemented as a compact and high-resolution optical device. The lens assembly may be diversified according to embodiments, and other various lens assemblies and electronic devices with the same may be provided, according to various embodiments.

A method, performed by a device, of processing an image, may include obtaining a circular image generated by photographing a target space through a fisheye lens; generating metadata including lens shading compensation information for correcting color information of the obtained circular image; and transmitting the obtained circular image and the metadata to a terminal.

A method, performed by a device, of processing an image, may include obtaining a circular image generated by photographing a target space through a fisheye lens; generating metadata including lens shading compensation information for correcting color information of the obtained circular image; and transmitting the obtained circular image and the metadata to a terminal.

An imaging system for correcting visual artifacts during production of extended-reality images for display apparatus. The imaging system includes at least first camera and second camera for capturing first image and second image of real-world environment, respectively; and processor(s) configured to: analyse first and second images to identify visual artifact(s) and determine image segment of one of first image and second image that corresponds to visual artifact(s); generate image data for image segment, based on at least one of: information pertaining to virtual object, other image segment(s) neighbouring image segment, corresponding image segment in other of first image and second image, previous extended-reality image(s), photogrammetric model of real-world environment; and process one of first image and second image, based on image data, to produce extended-reality image for display apparatus.

An image pickup apparatus which is capable of properly detecting and compensating for flash bands to generate a corrected image with no different levels of luminance. Based on an image signal output from an image pickup device which sequentially starts exposure and reads out signals for each row of pixels, a flash band appearing in a plurality of frames consecutive in terms of time due to an external flash is detected. Gains are changed with rows of the frames. At least one of the frames in which the flash band was detected is corrected to a full-screen flash image. When flash bands caused by a plurality of external flashes fired in one frame is detected, a gain is calculated based on a light quantity ratio between the external flashes, and a region where the flash bands overlay each other is multiplied by the gain to generate the full-screen flash image.

An image pickup apparatus which satisfactorily compensates for a flash band appearing due to an external flash and prevents a row insensitive to the flash from appearing in a corrected image. The flash band appearing in a plurality of frames consecutive in terms of time is detected based on an image signal output from an image pickup device which sequentially starts exposure and sequentially reads out signals for each row of pixels. An image in at least one of those frames is corrected to a full-screen flash image. When a width of the flash band is smaller than the number of rows in one frame, a row in which the flash band does not appear is interpolated using a row in which the flash band appears and which immediately precedes or immediately succeeds the row in which the flash band does not appear.