3D Measurement for High Reflective Aerospace Blades Based on Structured Illumination Photometric

Optical measurement methods, such as Photometric Stereo(PS) and Structured Light(SL), can significantly improve the manufacturing efficiency of metal blades. However, metal blades usually possess highly reflective and weakly textured surfaces, which can cause issues of missing and misaligned point clouds during optical measurements. This paper presents a Structured Illumination Photometric (SIP) method for highly reflective metal blades. It simultaneously acquires point cloud and normal vector data and establishes a data fusion optimisation model based on bilinear interpolation and normal vector constraints. The experiments have demonstrated that our method can efficiently acquire three-dimensional data of metal blades with a measurement accuracy of 0.03mm.