EP-4742651-A1 - ELECTRONIC DEVICE FOR COMPENSATING FOR EXTERNAL AREA ACCORDING TO KEYSTONE CORRECTION, AND CONTROL METHOD THEREFOR

EP4742651A1EP 4742651 A1EP4742651 A1EP 4742651A1EP-4742651-A1

Abstract

An electronic device is disclosed. The electronic device comprises: a projection unit for projecting an image of a specified resolution; a camera; and at least one processor including a processing circuit that is connected to the projection unit and the camera and controls the electronic device, wherein the at least one processor can: individually and/or collectively perform keystone correction on a first image; control the projection unit such that an image with specified resolution, in which the keystone-corrected first image is included in one area and a second image is included in the remaining area, is projected in a projection area; capture the projection area and an area outside the projection area through the camera so as to acquire a captured image; adjust a pixel value of the second image on the basis of first pixel information corresponding to the remaining area in the captured image and second pixel information corresponding to the area outside the projection area; and control the projection unit such that the image with specified resolution, in which the keystone-corrected first image is included in one area and the second image having the adjusted pixel value is included in the remaining area, is projected in the projection area.

Inventors

CHOI, EUNSEOK
CHAE, Sungho
WEON, Taehee

Assignees

Samsung Electronics Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20241025

Claims (15)

An electronic apparatus comprising: a projector configured to project an image with a specified resolution; a camera; and at least one processor, comprising processing circuitry, connected to the projector and the camera and individually and/or collectively configured to control the electronic apparatus, wherein at least one processor, individually and/or collectively is configured to: perform keystone correction for a first image; control the projector to project an image of the preset resolution in which the keystone-corrected first image is included in one area and a second image is included in a remaining area to a projection area; obtain a captured image by photographing the projection area and an external area of the projection area through the camera; adjust a pixel value of the second image based on first pixel information corresponding to the remaining area in the captured image and second pixel information corresponding to the external area of the projection area; and control the projector to project an image of the specified resolution in which the keystone-corrected first image is included in the one area and the second image with the adjusted pixel value is included in the remaining area to the projection area.
The apparatus as claimed in claim 1, wherein the specified image incudes an image of a specified color; and wherein at least one processor, individually and/or collectively, is configured to adjust a pixel value of the second image such that a difference between the first pixel information and the second pixel information is less than a threshold value.
The apparatus as claimed in claim 2, wherein at least one processor, individually and/or collectively, is configured to: obtain the captured image by photographing the projection area and the external area through the camera at a specified time interval; adjust a pixel value of the second image based on the first pixel information corresponding to the remaining area and the second pixel information corresponding to the external area in each of a plurality of captured images obtained at the specified time interval; and based on a difference between the first pixel information and the second pixel information being less than a threshold value, stop obtaining the captured image and adjusting the pixel value.
The apparatus as claimed in claim 1, wherein at least one processor, individually and/or collectively, is configured to: identify a pattern corresponding to the external area of the projection area in the captured image; and adjust a pixel value of the second image based on the identified pattern.
The apparatus as claimed in claim 1, wherein at least one processor, individually and/or collectively, is configured to adjust a pixel value of the second image further based on at last one of luminance or color of the keystone-corrected image.
The apparatus as claimed in claim 1, further comprising: a sensor, wherein at least one processor, individually and/or collectively, is configured to: obtain sensing information including ambient illuminance of the electronic apparatus through the sensor; and adjust a pixel value of the second image further based on the sensing information.
The apparatus as claimed in claim 1, further comprising: a sensor, wherein at least one processor, individually and/or collectively, is configured to: obtain sensing information including an angle at which the electronic apparatus is rotated with reference to a direction of gravity and an angle at which the electronic apparatus is rotated with reference to the projection area through the sensor; and perform the keystone correction for the first area by changing a shape of the first image based on the sensing information.
The apparatus as claimed in claim 1, further comprising: a user interface, wherein at least one processor, individually and/or collectively, is configured to adjust a pixel value of the second image based on a color corresponding to a user command received through the user interface.
The apparatus as claimed in claim 1, wherein the projection area includes an area to which light emitted from the projector is projected.
A method of controlling an electronic apparatus, comprising: performing keystone correction for a first image; projecting an image with a specified resolution in which the keystone-corrected first image is included in one area and a second image is included in a remaining area to a projection area; obtaining a captured image by photographing the projection area and an external area of the projection area; adjusting a pixel value of the second image based on first pixel information corresponding to the remaining area in the captured image and second pixel information corresponding to the external area of the projection area; and projecting an image of the specified resolution in which the keystone-corrected first image is included in the one area and the second image with the adjusted pixel value is included in the remaining area to the projection area.
The method as claimed in claim 10, wherein the specified image includes an image of a specified color; and wherein the adjusting comprises adjusting a pixel value of the second image such that a difference between the first pixel information and the second pixel information is less than a threshold value.
The method as claimed in claim 11, wherein the obtaining comprises obtaining the captured image by photographing the projection area and the external area at a specified time interval; wherein the adjusting comprises adjusting a pixel value of the second image based on the first pixel information corresponding to the remaining area and the second pixel information corresponding to the external area in each of a plurality of captured images obtained at the specified time interval; and wherein the method further comprises, based on a difference between the first pixel information and the second pixel information being less than a threshold value, stopping obtaining the captured image and adjusting the pixel value.
The method as claimed in claim 10, further comprising: identifying a pattern corresponding to the external area of the projection area in the captured image, wherein the adjusting comprises adjusting a pixel value of the second image based on the identified pattern.
The method as claimed in claim 10, wherein the adjusting comprises adjusting a pixel value of the second image further based on at last one of luminance or color of the keystone-corrected image.
The method as claimed in claim 10, further comprising: obtaining sensing information including ambient illuminance of the electronic apparatus; and wherein the adjusting comprises adjusting a pixel value of the second image further based on the sensing information.

Description

BACKGROUND Field The disclosure relates to an electronic apparatus and a controlling method thereof, and for example, to an electronic apparatus for compensating an external area resulting from keystone correction and a controlling method thereof. Description of Related Art With the development of electronic technology, electronic apparatuses that provide various functions are being developed. In particular various types of projectors have been popularized these days. A projector is a device that projects an image, and by projecting light onto a projection area to implement an image, it has the advantage of being able to easily implement a large screen compared to other types of display devices. Recently, projectors that offer keystone correction have become popularized, improving user convenience. SUMMARY An electronic apparatus according to an example embodiment includes: a projector configured to project an image with a specified resolution, a camera, and at least one processor, comprising processing circuitry, connected to the projector and the camera and individually and/or collectively configured to control the electronic apparatus, and at least one processor, individually and/or collectively, is configured to: perform keystone correction for a first image, control the projector to project an image of the specified resolution in which the keystone-corrected first image is included in one area and a second image is included in a remaining area to a projection area, obtain a captured image including a photograph of the projection area and an external area of the projection area through the camera, adjust a pixel value of the second image based on first pixel information corresponding to the remaining area in the captured image and second pixel information corresponding to the external area of the projection area, and control the projector to project an image of the specified resolution in which the keystone-corrected first image is included in the one area and the second image with the adjusted pixel value is included in the remaining area to the projection area. The image may be an image of a specified color, and at least one processor, individually and/or collectively, may be configured to adjust a pixel value of the second image such that a difference between the first pixel information and the second pixel information is less than a threshold value. At least one processor, individually and/or collectively, may be configured to: obtain the captured image including a photograph of the projection area and the external area through the camera at a specified time interval, adjust a pixel value of the second image based on the first pixel information corresponding to the remaining area and the second pixel information corresponding to the external area in each of a plurality of captured images obtained at the specified time interval, and based on a difference between the first pixel information and the second pixel information being less than a threshold value, stop obtaining the captured image and adjusting the pixel value. At least one processor, individually and/or collectively, may be configured to identify a pattern corresponding to the external area of the projection area in the captured image, and adjust a pixel value of the second image based on the identified pattern. At least one processor, individually and/or collectively, may be configured to adjust a pixel value of the second image based on at least one of luminance or color of the keystone-corrected image. The apparatus may further include a sensor, and at least one processor, individually and/or collectively, may be configured to: obtain sensing information including ambient illuminance of the electronic apparatus through the sensor, and adjust a pixel value of the second image based on the sensing information. The apparatus may further include a sensor, and at least one processor, individually and/or collectively, may be configured to: obtain sensing information including an angle at which the electronic apparatus is rotated with reference to a direction of gravity and an angle at which the electronic apparatus is rotated with reference to the projection area through the sensor, and perform the keystone correction for the first area by changing a shape of the first image based on the sensing information. The apparatus may further include a user interface, and at least one processor, individually and/or collectively, may be configured to adjust a pixel value of the second image based on a color corresponding to a user command received through the user interface. The projection area may be an area to which light emitted from the projector is projected. A method of controlling an electronic apparatus according to an example embodiment includes: performing keystone correction for a first image, projecting an image with a specified resolution in which the keystone-corrected first image is included in one area and a second image is included in a