According to various embodiments, an electronic device comprises: a camera; a display located between a subject to be photographed by the camera and the camera; a processor connected to the camera and the display; and a memory operatively connected to the processor, wherein the memory may store instructions which, when executed, enable the processor to: receive a first image from the camera; generate a second image by decreasing the resolution of the first image; obtain a third image indicating a difference between the second image and an image in which an artifact does not exist in the second image; generate a fourth image by increasing the resolution of the third image; and generate a fifth image by subtracting the fourth image from the first image.