An electronic apparatus includes: a memory, a communication interface comprising communication circuitry configured to communicate with a first external device and a second external device, a projection part configured to output an image to a projection surface, and a processor configured to: receive first data including a first image from the first external device, receive second data including a second image from the second external device, acquire first position information of the first external device and second position information of the second external device, acquire a projection image including the first image and the second image based on the first position information and the second position information, and control the projection part to output the projection image.

A video display device includes performs a first Retinex process on an inputted video and a second Retinex process, which is different from the first Retinex process, on the inputted video. A video composing unit is configured to compose a video processed by the first Retinex processing unit and a video processed by the second Retinex processing unit in accordance with a feature of the inputted video, which is then displayed. In a process of composing the video processed by the first and second Retinex processing units, the video composing unit is configured to perform a process of converting a luminance level for each pixel so that more output luminance levels are assigned to a luminance band having a large frequency distribution to improve visibility of the video. A gain of the luminance level converting process is varied in accordance with an average pixel value level of the inputted video.

A system includes a camera aimed externally to a vehicle, a window of the vehicle, a projector positioned to project on the window, and a computer communicatively coupled to the camera and the projector. The computer is programmed to, upon receiving data from the camera indicating a first person outside the vehicle, instruct the projector to project an image on the window depicting a second person inside the vehicle.

A system for measuring speckle contrast includes: a head up display (HUD) system configured to output a predetermined image and having a first pixels per degree (PPD); an imaging colorimeter: having a field of view; positioned such that the predetermined image is in the field of view; having a second PPD that is at least 2.2 times greater than the first PPD of the HUD system; and configured to capture an image including the predetermined image; and a speckle contrast module configured to determine a speckle contrast of the HUD system based on the image.

A projector device comprises: an image projection unit for projecting a guide image including a plurality of first objects; a camera; and a processor for obtaining a captured image acquired by the camera, the captured image including a guide image projected through the image projection unit. The processor identifies first location information corresponding to a location of each of a plurality of first objects included in the obtained captured image, identifies second location information corresponding to a location of each of a plurality of second objects related to the plurality of first objects, respectively, on the basis of the obtained captured image, and acquires image correction information on the basis of the first location information and the second location information.

A display method includes, determining a first target value by correcting a first luminance value representing luminance at a first position in a first image based on a second luminance value representing luminance at a second position in the first image, displaying, by the display apparatus, on the display surface a first corrected image generated by correcting the first image in such a way that a luminance at the first position in the first image becomes the first target value, displaying, by the display apparatus, on the display surface a third corrected image generated by using a changed first target value obtained by changing the first target value based on a second target value based on a fourth luminance value representing luminance at a fourth position in the second image, when the second target value is smaller than the first target value.

An electronic apparatus is provided. The electronic apparatus includes: a memory configured to store an image; a sensor part including at least one sensor; a projection part including a projection lens configured to output the image to a projection surface; and a processor configured to acquire distance information from the electronic apparatus to the projection surface through the sensor part, acquire output size information of the image based on the acquired distance information, acquire projection surface information corresponding to a bend of the projection surface through the sensor part, acquire movement information of the projection lens based on the output size information of the image and the projection surface information, and control the projection part to output the image based on the movement information.

A control method for a projector attachable to a wall via an attachment fixture includes determining whether the projector is attached to the wall, detecting oil included in air, determining, when determining that the projector is attached to the wall, based on a detection result of the oil included in the air, whether confirmation concerning the attachment of the projector is necessary, and displaying, when determining that the confirmation concerning the attachment of the projector is necessary, a confirmation image for urging the confirmation concerning the attachment of the projector on a display surface.

An electronic apparatus projecting an image is disclosed. The electronic apparatus includes a main body, a projector, a plurality of sensors including an acceleration sensor that detects a sensing value, and a plurality of distance sensors that detect a distance value between the electronic apparatus and a screen, a support connected to the main body, and a processor configured to identify a vertical angle by which the electronic apparatus is tilted, based on a sensing value detected by the acceleration sensor, identify a rotation angle by which the electronic apparatus is rotated based on a distance value detected by the plurality of distance sensors, perform a function corresponding to a keystone correction on an image to provide a modified image, identify a size of the modified image based on the vertical angle or the rotation angle, and control the projector to project the modified image based on the size of the modified image.

An adjustment method includes the steps of displaying, by a first display device, a first image used to help an input operation for performing an adjustment of a second display device different from the first display device, displaying, by the second display device, the first image and a second image in which a result of the adjustment is reflected, and outputting an adjustment parameter used to perform the adjustment to the second display device based on the input operation.