Improved viewing resolution of integral videography by use of rotated prism sheets.

We demonstrated that placing a pair of prism sheets in front of a display and rotating them overcomes the upper resolution limit of Integral Photograpy (IP) / Integral Videography (IV) imposed by the Nyquist sampling theorem. A pair of prism sheet with the same pitch placed in front of an IP or IV display parallel-shifts the light rays in the 3D space. Rotating the pair shifts the light rays, causing them to appear to rotate around their original positions. Changing the gap between the sheets changes the diameter of the apparent rotation. Changing the speed at which the sheets are rotated changes the speed of the image movement.. Experimental results showed that the quality of the IP and IV images is improved by using this technique. It is a simple and effective way to improve the viewing resolution of IP and IV images without reducing their 3D aspects, such as image depth. It also eliminates the need to move the lenslet array.