Title :
A 4D frequency-planar IIR filter and its application to light field processing
Author :
Dansereau, Don ; Bruton, Len
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
Abstract :
A 4D frequency-planar filter is described, having a steady-state frequency response with a pass band that approximates that of a 4D plane. It is shown that a light field containing Lambertian surfaces with no occlusions may be selectively filtered for depth using such a filter. Examples are given showing the effectiveness of the filter in scenes with and without occlusions. A technique for effectively reducing the length of the transient response of the filter is also proposed and the effectiveness of this technique is demonstrated.
Keywords :
IIR filters; frequency response; multidimensional digital filters; optical information processing; rendering (computer graphics); transient response; 4D frequency-planar IIR filter; Lambertian surfaces; image-based rendering; light field processing; occlusions; pass band; selectively depth filtering; steady-state frequency response; transient response length; Application software; Band pass filters; Frequency response; IIR filters; Layout; Light sources; Optical propagation; Rendering (computer graphics); Steady-state; Transient response;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205915
