Contents I. Introduction
Recently, 3D image that include depth information is applied in many technological parts, but there is a problem that is capturing depth information degrade spatial resolution. For this reason, light field camera has been pointed out much despite of the usability. The light field camera is a general device for capturing depth information. In the ordinary light field camera, the micro lens array (MLA) is placed on focal plane away from the image sensor. Potentially, this camera system can be used to refocus an image virtually on a computer after the picture has been taken. However, the large proportion of sensor pixels must be devoted to the directional dimensions in the 4D radiance, which results in low spatial resolution of the final rendered images [1].
