Abstract

Recent coded aperture imaging systems have shown great success in scene reconstruction, extended depth-of-field and light field imaging. By far nearly all solutions are built on top of commodity cam- eras equipped with a single spherical lens. In this paper, we explore coded aperture solutions on a special non-centric lens called the crossed- slit (XSlit) lens. An XSlit lens uses a relay of two orthogonal cylindrical lenses, each coupled with a slit-shaped aperture. Through ray geometry analysis, we first show that the XSlit lens produces a different and po- tentially advantageous depth-of-field than the regular spherical lens. We then present a coded aperture strategy that individually encodes each slit aperture, one with broadband code and the other with high depth discrepancy code, for scene recovery. Synthetic and real experiments vali- date our theory and demonstrate the advantages of XSlit coded aperture solutions over the spherical lens ones.