A Coded Structured Light System Based on Primary Color Stripe Projection and Monochrome Imaging

Sensors

Sandro Barone²  Alessandro Paoli¹ 

[1] Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, n.1, 56126 Pisa, Italy;

关键词: 3D shape acquisition;    texture reconstruction;    Coded Structured Light;    De Bruijn pattern;   

DOI  :  10.3390/s131013802

来源: mdpi

【 摘 要 】

Coded Structured Light techniques represent one of the most attractive research areas within the field of optical metrology. The coding procedures are typically based on projecting either a single pattern or a temporal sequence of patterns to provide 3D surface data. In this context, multi-slit or stripe colored patterns may be used with the aim of reducing the number of projected images. However, color imaging sensors require the use of calibration procedures to address crosstalk effects between different channels and to reduce the chromatic aberrations. In this paper, a Coded Structured Light system has been developed by integrating a color stripe projector and a monochrome camera. A discrete coding method, which combines spatial and temporal information, is generated by sequentially projecting and acquiring a small set of fringe patterns. The method allows the concurrent measurement of geometrical and chromatic data by exploiting the benefits of using a monochrome camera. The proposed methodology has been validated by measuring nominal primitive geometries and free-form shapes. The experimental results have been compared with those obtained by using a time-multiplexing gray code strategy.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.