An all-solid-state optical range camera for 3D real-time imaging with sub-centimeter depth resolution (SwissRanger)

Oggier, Thierry; Lehmann, Michael; Kaufmann, R.; Schweizer, Matthias R.; Richter, Michael; Metzler, Peter; Lang, Graham K.; Lustenberger, Felix; Blanc, Nicolas

doi:10.1117/12.513307

Cited by 198 publications

(123 citation statements)

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“…To mention a few: the background light, which is suppressed by an optical filter as well as on-chip filtering, and the amplitude, A, which is affected by the distance to the object and its reflective properties. This lower accuracy bound of the sensor has been investigated and well documented by CSEM in [2], [9], [10]. Here it is shown that the measured values from the camera are close to this physical limitation in certain given scenarios.…”

Section: A "Internal" Effectsmentioning

confidence: 82%

Environmental Effects on Measurement Uncertainties of Time-of-Flight Cameras

Guomundsson

Aanæs

Larsen

2007

2007 International Symposium on Signals, Circuits and Systems

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Abstract-In this paper the effect the environment has on the SwissRanger SR3000 Time-Of-Flight camera is investigated. The accuracy of this camera is highly affected by the scene it is pointed at: Such as the reflective properties, color and gloss. Also the complexity of the scene has considerable effects on the accuracy. To mention a few: The angle of the objects to the emitted light and the scattering effects of near objects. In this paper a general overview of known such inaccuracy factors are described, followed by experiments illustrating the additional uncertainty factors. Specifically we give a better description of how a surface color intensity influences the depth measurement, and illustrate how multiple reflections influence the resulting depth measurement.

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Section: A "Internal" Effectsmentioning

confidence: 82%

Environmental Effects on Measurement Uncertainties of Time-of-Flight Cameras

Guomundsson

Aanæs

Larsen

2007

2007 International Symposium on Signals, Circuits and Systems

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“…The depth resolution under these conditions is only about 1.5 cm without any spatial filtering, and may reach 0.6 cm with the spatial filtering with a window size of 5 × 5 pixels. A detailed discussion of the theoretical background and practical implementation of the camera can be found, e.g., in [10]. Figure 1.…”

Section: System Architecturementioning

confidence: 99%

A Virtual Keyboard Based on True-3D Optical Ranging

Du¹,

Oggier²,

Lustenberger³

et al. 2005

Procedings of the British Machine Vision Conference 2005

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In this paper, a complete system is presented which mimics a QWERTY keyboard on an arbitrary surface. The system consists of a pattern projector and a true-3D range camera for detecting the typing events. We exploit depth information acquired with the 3D range camera and detect the hand region using a pre-computed reference frame. The fingertips are found by analyzing the hands' contour and fitting the depth curve with different feature models. To detect a keystroke, we analyze the feature of the depth curve and map it back to a global coordinate system to find which key was pressed. These steps are fully automated and do not require human intervention. The system can be used in any application requiring zero form factor and minimized or no contact with a medium, as in a large number of cases in human-to-computer interaction, virtual reality, game control, 3D designs, etc.

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“…The processing will depend on the complexity of the scene and the required precision. The third solution is based on the time of fly of an energetic wave (Oggier, 2004).…”

Section: Algorithms Used For Diagnosis Helpingmentioning

confidence: 99%