format data the integrated format data processing unit 120 checks whether a unique native algorithm with respect to the native format data of the integrated format data exists when a unique native algorithm exists the integrated format data processing unit 120 processes the native format data by applying the native algorithm rather than using the common format data of the integrated format data to be processed if a native algorithm with respect to the native format data of the integrated format data does not exist the integrated format data processing unit 120 processes the common format data of the integrated format data by applying a common algorithm and outputs a processed stereoscopic image meanwhile both a native algorithm and a common algorithm with respect to the 3d stereoscopic image processing function to be applied do not exist the integrated format data processing unit 120 returns an error in case of applying a focus changing function as an example of 3d stereoscopic image processing to a stereo based 3d stereoscopic image data and light field based 3d stereoscopic image data when focus changing is applied to stereoscopic data since a native algorithm does not exist a focus changing common algorithm is applied to common format data to create a result in case of performing focus changing on light field based data a light field dedicated native focus changing algorithm without using the common algorithm is applied to create a result by applying native algorithms by respective formats better results.