A researcher develops a method for reconstructing highly accurate 3D objects without texture

Sergio Fernández, a researcher from VICOROB, has outlined a method that is able to work in mobile environments. This advance is especially important in the field of medicine and, in particular, human body scanners where it is difficult to ensure that patients remain in fixed positions.

In computer vision, it is often necessary to reconstruct objects without texture. Structured light solves the problem by projecting one or more light patterns on the surface to be reconstructed. Traditionally greater detail has required projecting more than one pattern consecutively. However, this is not possible for mobile environments such as production lines or with human body scanners, where is difficult to ensure that a patient remains static.

Working at the University of Girona (UdG), Sergio Fernandez has developed a new light pattern capable of extracting high level detail with a single projection onto a surface. The method is based on the combined use of the system for multiplexing frequency (Windowed Fourier Transform), with color coding using DeBruijn patterns.

The results validate the use of the proposed pattern for mobile environments. Furthermore, the accuracy obtained was equivalent to the best three-dimensional reconstructions using multiple projections.

Sergio Fernandez’s findings are presented in his doctoral thesis ‘One-shot pattern projection for dense and accurate 3D reconstruction in structured light’, which has been published in the prestigious journal ‘Pattern Recognition’, receiving the award for the best article of the year 2010. The research was supervised by Dr. Joaquim Salvi and developed in the Computer Vision and Robotics group (VICOROB) of the University of Girona.

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