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Depth sensing using coherence mapping |
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| Authors: | Estela Valero Zeev Zalevsky |
| Affiliation: | a AIDO - Technological Institute of Optics, Color and Imaging, C/ Nicolás Copérnico 7-13, 46980, Paterna, Spain b Departamento de Óptica, Universitat de Valencia, C/Dr. Moliner, 50, 46100 Burjassot, Spain c School of Engineering, Bar-Ilan University, Ramat-Gan, 52900, Israel |
| Abstract: | A method for depth sensing based on sensing the visibility associated with the coherence function of a laser source is presented. The setup is based on an electronic speckle pattern interferometric (ESPI) setup, where the object depth is encoded into the amplitude of the interference pattern without the need for depth scanning. After performing phase-shifting method, the object three-dimensional (3-D) shape is reconstructed by means as a range image from the visibility of the image set of interferograms and where each gray level represents a given object depth. Experimental results validate the proposed approach for reflective diffuse objects at different measurement distances. |
| Keywords: | Three-dimensional mapping Phase shifting speckle interferometry Coherence coding |
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