Apparatus and method for synthesizing an image in a portable terminal equipped with a dual camera

A method and an apparatus for processing an image in a portable terminal equipped with a dual camera are provided. The method includes selecting an image synthesis mode, performing a simultaneous or a sequential photographing of a front camera and a rear camera, obtaining a first image and a second image through the front camera and the rear camera, detecting an object image from one of the first image and the second image, and generating a synthesized image by synthesizing the object image to the other of the first image and the second image in which the object image was not detected.