In an electronic device according to an embodiment of the present disclosure, the electronic device may include a memory, a display which includes a pixel layer including a plurality of pixels and a shielding structure with a hole formed disposed below the pixel layer, a camera module disposed below the shielding structure, and a processor operatively coupled with the camera module and the memory, and the processor may obtain a light source image through the camera module, obtain a first data based on a first length value corresponding to a first region and a second length value corresponding to a second region in the obtained light source image, compare the first data with second data stored in the memory, obtain actual light amount data corresponding to the light source based on a result of the comparison, and improve the image based on the actual light amount data.