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Stereo Time-of-Flight with Constructive Interference
July 2014 (vol. 36 no. 7)
pp. 1-1
Victor Castaneda, Computer Science DepartmentComputer Aided Medical Procedures (CAMP), Technische Universität München (TUM), Münich, Bavaria, Germany
Diana Mateus, Computer Science DepartmentComputer Aided Medical Procedures (CAMP), Technische Universität München (TUM), Münich, Bavaria, Germany
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.
Index Terms:
Cameras,Lighting,Interference,Three-dimensional displays,Biomedical measurement,Cost function,Reconstruction,Emerging technologies,Sensors
Citation:
Victor Castaneda, Diana Mateus, Nassir Navab, "Stereo Time-of-Flight with Constructive Interference," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 36, no. 7, pp. 1-1, July 2014, doi:10.1109/TPAMI.2013.195
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