6533b837fe1ef96bd12a26b9

RESEARCH PRODUCT

Depth sensing using coherence mapping

Estela ValeroZeev ZalevskyJavier GarciaVicente Micó

subject

business.industryComputer scienceLaser sourceAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsGray levelSpeckle patternInterferometryOpticsAmplitudeElectronic speckle pattern interferometryCoherence (signal processing)Speckle imagingElectrical and Electronic EngineeringPhysical and Theoretical Chemistrybusiness

description

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.

yearjournalcountryeditionlanguage
2010-08-01Optics Communications
https://doi.org/10.1016/j.optcom.2010.04.033