Depth resolution enhanced spatial filtering in integral imaging based on convolution property between periodic functions with interpolation method

We propose a depth resolution improved target depth image extraction method in integral imaging by using the convolution property between periodic functions (CPPF) with image interpolation algorithm. We derive the depth resolution equation of a direct pickup system and analyze the factors related to the change of the depth resolution which are the focal length of an elemental lens and the resolution of an elemental image. We investigate the effect according to the change of these factors. The simulation results show that the key factor to change the depth resolution is the resolution of an elemental image. To show the feasibility of the proposed method, we carry out the preliminary experiments and present the results.