An electronic device performs HDR processing by using a plurality of image sensor blocks including a first image sensor block that photographs an object at a first field of view and a second image sensor block that photographs the object at a second field of view greater than the first field of view. An image signal processor generates first image data and second image data based on the photographed object. A main processor crops image data among image data of the second sensor that correspond to image data of the first sensor, and performs HDR processing based on the first image data and the cropped second image data.