1. An electronic device for previewing dual-shot images, comprising: a display screen; a first image sensor configured to capture a front image; a second image sensor configured to capture a rear image; an image signal processor configured to perform image processing on images captured by the first and second image sensors; a controller configured to: set an area of pixels of interest based on algorithmic recognition of a subject part within the front image, the area of pixels of interest enclosing the subject part, output from the first image sensor a partial image based on the set area of pixels of interest, create, using the image signal processor, a combined image by overlaying the partial image on the rear image; and display on the display screen the combined image.