Analysis of Errors in ToF Range Imaging With Dual-Frequency Modulation
Range imaging is a technology that utilizes an amplitude-modulated light source and gain-modulated image sensor to simultaneously produce distance and intensity data for all pixels of the sensor. The precision of such a system is, in part, dependent on the modulation frequency. There is typically a...
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| Veröffentlicht in: | IEEE transactions on instrumentation and measurement 2011-05, Vol.60 (5), p.1861-1868 |
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| creator | Jongenelen, A P P Bailey, D G Payne, A D Dorrington, A A Carnegie, D A |
| description | Range imaging is a technology that utilizes an amplitude-modulated light source and gain-modulated image sensor to simultaneously produce distance and intensity data for all pixels of the sensor. The precision of such a system is, in part, dependent on the modulation frequency. There is typically a tradeoff between precision and maximum unambiguous range. Research has shown that, by taking two measurements at different modulation frequencies, the unambiguous range can be extended without compromising distance precision. In this paper, we present an efficient method for combining two distance measurements obtained using different modulation frequencies. The behavior of the method in the presence of noise has been investigated to determine the expected error rate. In addition, we make use of the signal amplitude to improve the precision of the combined distance measurement. Simulated results compare well to actual data obtained using a system based on the PMD19k range image sensor. |
| doi_str_mv | 10.1109/TIM.2010.2089190 |
| format | Article |
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| source | IEEE Electronic Library (IEL) |
| subjects | 3-D camera Ambiguity Digital cameras Error analysis Frequency modulation image sensor Imaging Instrumentation Modulation Noise Phase measurement Pixels range imaging Sensors Simulation Studies Time frequency analysis time of flight (ToF) |
| title | Analysis of Errors in ToF Range Imaging With Dual-Frequency Modulation |
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