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Issue No.07 - July (2014 vol.36)
pp: 1402-1413
Nassir Navab , Computer Science DepartmentComputer Aided Medical Procedures (CAMP), Technische Universität München (TUM), Münich, Bavaria, Germany
This paper describes a novel method to acquire depth images using a pair of ToF (Time-of-Flight) cameras. As opposed to approaches that filter, calibrate or do 3D reconstructions posterior to the image acquisition, we combine the measurements of the two cameras within a modified acquisition procedure. The new proposed stereo-ToF acquisition is composed of three stages during which we actively modify the infrared lighting of the scene: first, the two cameras emit an infrared signal one after the other (stages 1 and 2), and then, simultaneously (stage 3). Assuming the scene is static during the three stages, we gather the depth measurements obtained with both cameras and define a cost function to optimize the two depth images. A qualitative and quantitative evaluation of the performance of the proposed stereo-ToF acquisition is provided both for simulated and real ToF cameras. In both cases, the stereo-ToF acquisition produces more accurate depth measurements. Moreover, an extension to the multi-view ToF case and a detailed study on the interference specifications of the system are included.
Cameras, Lighting, Interference, Three-dimensional displays, Biomedical measurement, Cost function,Reconstruction, Emerging technologies, Sensors
Nassir Navab, "Stereo Time-of-Flight with Constructive Interference", IEEE Transactions on Pattern Analysis & Machine Intelligence, vol.36, no. 7, pp. 1402-1413, July 2014, doi:10.1109/TPAMI.2013.195
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