Open AccessMicro-Frequency Shifting Projection Technique for Inter-Reflection Removal
Author(s) -
Zhaoshuai Qi,
Zhao Wang,
Junhui Huang,
Chao Xing,
Qiongqiong Duan,
Jianmin Gao
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.028293
Subject(s) - specular reflection , optics , reflection (computer programming) , diffuse reflection , projection (relational algebra) , modulation (music) , spatial frequency , frequency modulation , computer science , materials science , physics , acoustics , telecommunications , bandwidth (computing) , algorithm , programming language
Inter-reflection removal is vital for complex-scene reconstruction. However, most methods assume that the tested surface is a diffuse, and are limited to removal of inter-reflection caused only by diffuse reflections. For all kinds of inter-reflections caused by diffuse and specular reflections, a micro-frequency shifting (MFS) projection technique is presented. Because the modulation variation with frequency in inter-reflection regions is larger than that of other regions, we use the MFS technique to detect inter-reflections, where patterns with specifically designed frequency-shifts and base frequencies are projected. Inter-reflections are detected through large variations in modulation, and removed using a regional-projection technique. Experimental results validate the effectiveness for diffuse and specular inter-reflection removal.