相移轮廓术周期性光源干扰

Periodic Light Disturbance in Fringe Projection Profilometry

随着数字投影技术的发展,基于光栅投影的三维测量技术在众多领域中得到了广泛应用。但是大多数应用场景下,环境中都存在着各种周期性的光源,对光栅投影的成像过程造成干扰,在相位提取的过程中引入非线性误差,进而影响三维重建的精度。针对上述问题,从时域上分析环境光源的干扰因素,通过采集分析周期性环境光影响的图像并建立光源模型,为此提出一种高精度的相位补偿算法。实验证明所提算法可有效抑制由环境光源带来的相位非线性误差。

With the development of the digital projection technology,the three-dimensional(3D)measurement technology based on fringe projection is being widely used in many fields.However,in most application environments,there are various periodic light sources in most application environments,which cause interference to the imaging process of grating projection.Nonlinear errors are introduced in the phase extraction process,thus affecting the accuracy of 3D reconstruction.To solve this problem,the interference factors of the ambient light source are analyzed in the time domain,and the light source model is established by collecting and analyzing the images affected by the periodic ambient light.For this reason,a high-precision phase compensation algorithm is proposed.Experiments illustrate that the proposed algorithm can effectively suppress the phase nonlinear error caused by the environmental light sources.