Evaluation of a laser based structured light system for 3D reconstruction of underwater environments

Massot Campos, Miquel and Oliver Codina, Gabriel (2013) Evaluation of a laser based structured light system for 3D reconstruction of underwater environments. In Martech 2013 5th International Workshop on Marine Technology. Universidad de Girona..

Record type: Conference or Workshop Item (Paper)

Abstract

Structure from motion or stereoscopy are used to obtain 3D from a sequence of still images. However if there is no texture or features in the images, no 3D can be obtained. Featureless environments are difficult to reconstruct in 3D only using cameras. Projected light patterns can be used to measure the shape or an object. However, scattering is the main problem in light based underwater sensors such as light and cameras. Collimated light such as laser minimizes this problems by focusing the light in fewer points. Ranged gated cameras can be also used with pulsed lasers to reduce even more the scattering. In this paper a new structured light laser system is evaluated to solve the scattering and featureless problems above mentioned andto perform a 3D underwater reconstruction. This system is formed by a laser projector and a camera. By means of pattern identification and triangulation, 3D can be reconstructed from a live video sequence.

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