Computational image projection with extended depth-of-field and field-of-view: concept and implementations
Tomoya Nakamura, Ryoichi Horisaki, Jun Tanida · 2014
Depth-of-field (DOF) and field-of-view (FOV) in image projection are restricted by three-dimensional (3D) aberrations. A standard method is to measure the 3D position of the screen before projection. Computational projection with phase modulation provides an effective solution for this problem. Under the concept of point spread function (PSF) engineering, the PSF is modified and post-processing is performed to enhance the property of imaging system. Based on this idea, a method for extended-DOF projection was proposed, which uses a cubic phase plate for depth-invariant PSF [1]. We developed the method for extension of both DOF and FOV with 3D space-invariant PSFs in image projection [2,3]. In this presentation, we introduce two implementations for the extended-DOF and -FOV projection and summarize their features.