Maximizing precision over extended unambiguous range for TOF range imaging systems

Maximizing precision over extended unambiguous range for TOF range imaging systems

Jongenelen, Adrian P.P. ; Carnegie, Dale A. ; Payne, Andrew D. ; Dorrington, Adrian A.

Identifier: http://hdl.handle.net/10289/4031

Date: 2010

Citation: Jongenelen, A.P.P., Carnegie, D.A., Payne, A.D. & Dorrington, A.A. (2010). Maximizing precision over extended unambiguous range for TOF range imaging systems. In Proceedings of 2010 IEEE Instrumentation & Measurement Technology Conference, 3-6 May 2010, Austin, TX, USA (pp. 1575-1580). Washington DC, USA: IEEE.

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Abstract:

The maximum unambiguous range for time-of-flight range imaging systems is inversely proportional to the chosen modulation frequency. However, increasing the unambiguous range by decreasing the modulation frequency will generally also degrade the range measurement precision. We describe a technique that significantly extends the range of a time-of-flight imaging system without compromising range precision. This is achieved by employing two modulation frequencies simultaneously. The chosen frequencies can be a combination of high and low frequency, or two similarly high frequencies. In this paper we present experimental results comparing single frequency; dual high and low frequency; and dual high frequency operation and demonstrate that range precision need not be appreciably compromised to achieve an extended unambiguous range.

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