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EP-3876517-B1 - ELECTRONIC DEVICE, CONTROL METHOD, PROGRAM, AND COMPUTER READABLE MEDIUM

EP3876517B1EP 3876517 B1EP3876517 B1EP 3876517B1EP-3876517-B1

Inventors

  • Yamanaka, Yohei

Dates

Publication Date
20260506
Application Date
20210304

Claims (9)

  1. An electronic device (100) comprising: a line-of-sight input means (160) configured to receive a line-of-sight input by a line of sight of a user who looks at a display means (28); an acquisition means (22) configured to acquire an image that is captured and acquired by predetermined imaging control; a display control means (50) configured to display the image, which is acquired by the acquisition means (22), on the display means (28); a first operation means (70) configured to receive a first operation input, which is different from the line-of-sight input, by the user; a second operation means (70) configured to receive a second operation input, which is different from the first operation input, by the user; and a control means (50) configured to, in a state where the image is displayed on the display means (28) by the display control means (50), perform setting of the predetermined imaging control on a basis of a line-of-sight position, to which the line of sight is inputted, in a case where the first operation input is performed, wherein the setting of the predetermined imaging control is setting of a focal point detection region for focusing on an object corresponding to the line-of-sight position, characterized in that the control means (50) is further configured to calculate a brightness decreasing amount of peripheral darkening, which is a decreasing amount of the brightness of the image from a center to a edge of the image based on individual information of a lens attached to the electronic device (100) and an aperture value having been set, and perform image processing on the image displayed on the display means (28) on a basis of the line-of-sight position in a case where the second operation input is performed, wherein the image processing is processing to increase brightness of a region corresponding to the line-of-sight position by a change amount based on the brightness decreasing amount of the peripheral darkening, in the image displayed on the display means (28).
  2. The electronic device (100) according to Claim 1, wherein in a case where the brightness of the region is lower than a threshold, the control means (50) is configured to correct the brightness of the region to brightness of the threshold.
  3. The electronic device (100) according to any one of Claims 1 to 2, wherein the image processing is processing to change an image processing parameter of a region corresponding to the line-of-sight position in the image displayed on the display means (28).
  4. The electronic device (100) according to any one of Claims 1 to 3, wherein the image processing is processing on a region corresponding to the line-of-sight position in the image displayed on the display means (28).
  5. The electronic device (100) according to any one of Claims 1 to 4, wherein the control means (50) is configured to perform image processing on the image displayed on the display means (28) on a basis of the line-of-sight position in a case where the second operation input is performed, and record an image to be recorded in a recording medium, without performing the image processing.
  6. The electronic device (100) according to any one of Claims 1 to 5, wherein the display control means (50) is configured to display an indicator corresponding to the line-of-sight position.
  7. A control method of an electronic device (100), comprising: receiving a line-of-sight input by a line of sight of a user who looks at a display means (28); acquiring an image that is captured and acquired by predetermined imaging control; displaying the acquired image on the display means (28); receiving a first operation input, which is different from the line-of-sight input, by the user; receiving a second operation input, which is different from the first operation input, by the user; performing setting of the predetermined imaging control on a basis of a line-of-sight position, to which the line of sight is inputted, in a case where the first operation input is performed in a state where the image is displayed on the display means (28), wherein the setting of the predetermined imaging control is setting of a focal point detection region for focusing on an object corresponding to the line-of-sight position; characterized by calculating a brightness decreasing amount of peripheral darkening, which is a decreasing amount of the brightness of the image from a center to a edge of the image based on individual information of a lens attached to the electronic device (100) and an aperture value having been set, and performing image processing on the image displayed on the display means (28) on a basis of the line-of-sight position in a case where the second operation input is performed in a state where the image is displayed on the display means (28), wherein the image processing is processing to increase brightness of a region corresponding to the line-of-sight position by a change amount based on the brightness decreasing amount of the peripheral darkening, in the image displayed on the display means (28).
  8. A program that causes the electronic device (100) according to any one of claims 1 to 6 to execute the method according to claim 7.
  9. A computer readable medium storing a program according to claim 8.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an electronic device, and more particularly to an electronic device that can receive a line-of-sight input. Description of the Related Art Electronic devices of which operation is performed by a user using the line of sight of the user (hereafter line-of-sight input) are known. The line-of-sight input is particularly effective when the user wants to quickly instruct operation to an electronic device such as a digital camera and a game machine. Japanese Patent Application Publication No. 2014-197109 discloses that a user attention region to which the user pays attention is determined, and based on this determination result, control is performed so as to differentiate the lightness of the user attention region from the lightness of a non-attention region, which is a region other than the user attention region, in a game image. As a function (technique) related to cameras, a function to constantly perform focusing control by the line-of-sight input (control to receive a line-of-sight input and perform focusing at an AF frame position in accordance with the line-of-sight position (position at which the line-of-sight input is directed)) has been proposed. In this function, a user has to gaze at an object to be focused on, in a displayed live view image, without looking away from the object desired to be focused (desired to be brought into focus). Further, by using the technique disclosed in Japanese Patent Application Publication No. 2014-197109, the brightness of the attention region of the line-of-sight input, out of the live view image, can be controlled (brightness control by the line-of-sight input). However, if the function of the brightness control by the line-of-sight input is added to an electronic device which constantly performs focusing control by the line-of-sight input, the focusing control or the like may not be performed properly (may not be performed with favorable operability). For example, here, it is assumed that a user looks at an object B, which is different from an object A that is to be focused on, in a live view image in order to control the brightness of the object B. In this case, the brightness of the object B can be controlled as the user intends, but the focusing target is switched from the object A to the object B contrary to the user's intention. Further, in some cases, the user may check a region other than the object to be focused on, in order to confirm framing (composition). In a case of such checking as well, the focusing target may be switched contrary to the user's intention. Document EP 2 608 524 A1 discloses a device includung a primary camera to capture images, a secondary camera to capture images, a viewfinder, and a processor. The viewfinder can display images captured by the primary camera. The processor can provide eye tracking analysis on images captured by the secondary camera in order to determine a region of interest in the viewfinder. The processor further associates the region of interest with a portion of an image captured by the primary camera. The processor further initiates an autofocus procedure based on the region of interest. Document US 2015/062402 A1 discloses a display device including a display section, a visual line detecting section, a visual line judging section, a display control section, and a display changing section. The visual line judging section acquires a visual point position on the display screen corresponding to the visual line direction detected by the visual line detecting section, and judges whether or not the visual point position has entered into the a display region. The display changing section changes the display of at least one of a first display region and a second display region, if it is judged by the visual line judging section that the visual point position has entered into the second display region in the state where the visual point position is in the first display region. Document US 2013/287313 A1 discloses a system and method providing enhanced perceived contrast within a region of interest of an image being displayed in order to enable viewers to more easily perceive subtle features in images, such as during medical diagnostics. SUMMARY OF THE INVENTION The present invention provides an electronic device which can perform a plurality of controls (processing operations) such as a focusing control and a brightness control by a line-of-sight input properly (with favorable operability). The present invention in its first aspect provides an electronic device as specified in claims 1 to 6. The present invention in its second aspect provides a control method as specified in claim 7. The present invention in its third aspect provides a program as specified in claim 8. The present invention in its fourth aspect provides a computer readable medium as specified in claim 9. Further features of the present invention will become apparent from the f