Apparatus for displaying a 3-d image capable of selecting a composite frame structure, and method for processing the 3-d image

A 3D image display device capable of selecting a synthesis frame structure and a 3D image processing method therefor are provided to output image data photographed by one of two cameras in a digital 3D image device. The first and the second camera units(107,109) are installed in the outside of a 3D image device. A 3D image processing unit(111) generates the first and the second image data by using the first and the second image signals received from the first and the second camera units(107,109), synthesizes the first and the second image data according to a certain synthesis frame structure which is set up in response to the input of a user among a plurality of previously stored synthesis frame structures corresponding to inter-different 3D image synthesis types, and generates synthesis image data.