Pseudo-random modulation for multiple 3D time-of-flight camera operation

Dong-Ki Min; Ilia Ovsiannikov; Yohwan Noh; Wanghyun Kim; Sunhwa Jung; Joonho Lee; Deokha Shin; Hyekyung Jung; Lawrence Kim; Grzegorz Waligorski; Lilong Shi; Yoondong Park; Chilhee Chung

doi:10.1117/12.2005987

12 March 2013 Pseudo-random modulation for multiple 3D time-of-flight camera operation

Dong-Ki Min, Ilia Ovsiannikov, Yohwan Noh, Wanghyun Kim, Sunhwa Jung, Joonho Lee, Deokha Shin, Hyekyung Jung, Lawrence Kim, Grzegorz Waligorski, Lilong Shi, Yoondong Park, Chilhee Chung

Author Affiliations +

Proceedings Volume 8650, Three-Dimensional Image Processing (3DIP) and Applications 2013; 865008 (2013) https://doi.org/10.1117/12.2005987
Event: IS&T/SPIE Electronic Imaging, 2013, Burlingame, California, United States

Abstract

3D time-of-flight depth cameras utilize modulated light sources to detect the distance to objects as phase information. A serious limitation may exist in cases when multiple depth time-of-flight cameras are imaging the same scene simultaneously. The interference caused by the multiple modulated light sources can severely distort captured depth images. To prevent this problem and enable concurrent 3D multi-camera imaging, we propose modulating the camera light source and demodulating the received signal using sequences of pulses, where the phase of each sequence is varied in a pseudo-random fashion. The proposed algorithm is mathematically derived and proved by experiment.

Citation Download Citation

Dong-Ki Min, Ilia Ovsiannikov, Yohwan Noh, Wanghyun Kim, Sunhwa Jung, Joonho Lee, Deokha Shin, Hyekyung Jung, Lawrence Kim, Grzegorz Waligorski, Lilong Shi, Yoondong Park, and Chilhee Chung "Pseudo-random modulation for multiple 3D time-of-flight camera operation", Proc. SPIE 8650, Three-Dimensional Image Processing (3DIP) and Applications 2013, 865008 (12 March 2013); https://doi.org/10.1117/12.2005987

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