Deep Learning-Based 3D Measurements with Near-Infrared Fringe Projection

Deep Learning-Based 3D Measurements with Near-Infrared Fringe Projection

Blog Article

Fringe projection profilometry (FPP) is widely applied to 3D measurements, owing to its advantages of high accuracy, non-contact, and full-field scanning.Compared with most FPP systems that project visible patterns, invisible fringe patterns in the spectra of near-infrared SHEARS demonstrate fewer impacts on human eyes or on scenes where bright illumination may be avoided.However, the invisible patterns, which are generated by a near-infrared laser, are usually captured with severe speckle noise, resulting in 3D reconstructions of limited quality.To cope with this issue, we propose a deep learning-based framework that can remove the effect of the speckle noise and improve the precision of the 3D reconstruction.The framework consists of two deep neural networks where one learns to produce a clean NIPPLE BUTTER fringe pattern and the other to obtain an accurate phase from the pattern.

Compared with traditional denoising methods that depend on complex physical models, the proposed learning-based method is much faster.The experimental results show that the measurement accuracy can be increased effectively by the presented method.