Apparatus, control method, and storage medium

Abstract

An apparatus capable of communicating with a capturing apparatus includes a first acquisition unit configured to acquire an image captured by the capturing apparatus, a second acquisition unit configured to acquire first exposure information determined by the capturing apparatus based on a luminance of a first region in the image, a first determination unit configured to determine second exposure information based on a luminance of a second region, a second determination unit configured to determine correction information based on a difference between the first exposure information and the second exposure information, and an output unit configured to output the correction information to the capturing apparatus.

What is claimed is: 
     
         1 . An apparatus capable of communicating with a capturing apparatus, the apparatus comprising:
 at least one processor executing instructions that, when executed by the at least one processor, cause the at least one processor to:   acquire an image captured by the capturing apparatus;   acquire first exposure setting value from the capturing apparatus;   determine second exposure setting value based on a luminance of a specific region;   determine, based on the first exposure setting value and the second exposure setting value, an exposure correction value;   output, in a case where the exposure correction value is larger than a predetermined value, a new exposure correction value that is approximately equal to the predetermined value, to the capturing apparatus; and   output, in a case where the exposure correction value is equal to or smaller than the predetermined value, the exposure correction value, to the capturing apparatus.   
     
     
         2 . The apparatus according to  claim 1 , wherein in the case where the exposure correction value is larger than a predetermined value, the first exposure setting value is changed to the exposure correction value gradually after the first exposure setting value is changed to the output new exposure correction value. 
     
     
         3 . The apparatus according to  claim 1 , wherein the specific region includes a specific subject in the image. 
     
     
         4 . The apparatus according to  claim 1 , wherein the instructions further cause the at least one processor to:
 acquire a first input-output characteristic of the capturing apparatus concerning the image; and   convert a luminance of the image based on a second input-output characteristic which is an input-output characteristic inverse to the first input-output characteristic,   wherein a determination of the second exposure setting value based on a luminance of the specific region in the image.   
     
     
         5 . A method for controlling an apparatus capable of communicating with a capturing apparatus, the method comprising:
 acquiring an image captured by the capturing apparatus;   acquiring first exposure setting value determined by the capturing apparatus based on a luminance of a first region in the image;   determining second exposure setting value based on a luminance of a specific region;   determining an exposure correction value based on the first exposure setting value and the second exposure setting value;   outputting, in a case where the exposure correction value is larger than a predetermined value, a new exposure correction value that is approximately equal to the predetermined value, to the capturing apparatus; and   outputting, in a case where the exposure correction value is equal to or smaller than the predetermined value, the exposure correction value, to the capturing apparatus.   
     
     
         6 . The method according to  claim 5 , wherein in the case where the exposure correction value is larger than a predetermined value, the first exposure setting value is changed to the exposure correction value gradually after the first exposure setting value is changed to the output new exposure correction value. 
     
     
         7 . The method according to  claim 5 , wherein the specific region includes a specific subject in the image. 
     
     
         8 . The method according to  claim 5 , further comprising:
 acquiring a first input-output characteristic of the capturing apparatus concerning the image;   converting a luminance of the image based on a second input-output characteristic which is an input-output characteristic inverse to the first input-output characteristic; and   determining the second exposure setting value based on a luminance of the specific region in the image.   
     
     
         9 . A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by a computer, cause the computer to perform a method for controlling an apparatus capable of communicating with a capturing apparatus, the method comprising:
 acquiring an image captured by the capturing apparatus;   acquiring first exposure setting value determined by the capturing apparatus based on a luminance of a first region in the image;   determining second exposure setting value based on a luminance of a specific region;   determining an exposure correction value based on the first exposure setting value and the second exposure setting value;   outputting, in a case where the exposure correction value is larger than a predetermined value, a new exposure correction value that is approximately equal to the predetermined value, to the capturing apparatus; and   outputting, in a case where the exposure correction value is equal to or smaller than the predetermined value, the exposure correction value, to the capturing apparatus.   
     
     
         10 . The non-transitory computer-readable storage medium according to  claim 9 , wherein in the case where the exposure correction value is larger than a predetermined value, the first exposure setting value is changed to the exposure correction value gradually after the first exposure setting value is changed to the output new exposure correction value. 
     
     
         11 . The non-transitory computer-readable storage medium according to  claim 9 , wherein the specific region includes a specific subject in the image. 
     
     
         12 . The non-transitory computer-readable storage medium according to  claim 9 , wherein the method further comprises:
 acquiring a first input-output characteristic of the capturing apparatus concerning the image;   converting a luminance of the image based on a second input-output characteristic which is an input-output characteristic inverse to the first input-output characteristic; and   determining the second exposure setting value based on a luminance of the specific region in the image.