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