1. A method of image processing, comprising: receiving a first image and a second image; obtaining a three-dimensional (3D) depth corresponding to a portion of the first image; capturing the portion of the first image as a first image object according to the 3D depth to generate a first superimposing object; obtaining a second image object according to a portion of the second image to generate a second superimposing object; and superimposing the first superimposing object and the second superimposing object to generate a synthesized image.