Electronic device for adjusting exposure value of image including face

A method of adjusting an exposure value of an image obtained by a camera of an electronic device including a display, the method comprising:

• recognizing a face among a plurality of preview images;
• setting a first exposure value of a first image that is one of the plurality of preview images to a basic exposure value among the plurality of preview images such that a first brightness falls within a specified brightness range, wherein the first brightness is of a first area including the face;
• extracting the first brightness and a second brightness, wherein the second brightness is of a second area excluding the first area;
• when a difference between the first brightness and the second brightness is greater than or equal to a specified difference value, adjusting at least one of a second exposure value of a second image or a third exposure value of a third image, wherein the second image and the third image are bracketing images, wherein the second exposure value corresponding to the second image is smaller than the first exposure value of the first image, and wherein the third exposure value corresponding to the third image is greater than the first exposure value of the first image;
• generating a high dynamic range image by synthesizing at least one of a bracketing image including the first exposure value, the second image or the third image;
• and
• displaying the generated high dynamic range image on the display.

A non-transitory computer readable medium containing instructions that when executed cause at least one processor of an electronic device to:

• recognize a face among a plurality of preview images;
• set a first exposure value of a first image that is one of the plurality of preview images to a basic exposure value among the plurality of preview images such that a first brightness falls within a specified brightness range, wherein the first brightness is of a first area including the face;
• extract the first brightness and a second brightness, wherein the second brightness is of a second area excluding the first area;
• when a difference between the first brightness and the second brightness is greater than or equal to a specified difference value, adjust at least one of a second exposure value of a second image or a third exposure value of a third image, wherein the second image and the third image are bracketing images, wherein the second exposure value corresponding to the second image is smaller than the first exposure value of the first image, and wherein the third exposure value corresponding to the third image is greater than the first exposure value of the first image;
• generate a high dynamic range (HDR) image by synthesizing at least one of a bracketing image including the first exposure value, the second image or the third image;
• and
• display the generated high dynamic range image on a display.