Deflectometry based on light-field imaging

Abstract

This work presents how deflectometry can be coupled with a light-field camera to better characterize and quantify the depth of anomalies on specular surfaces. In our previous work,1 we proposed a new scanning scheme for the detection and 3D reconstruction of defects on reflective objects. However, the quality of the reconstruction was strongly dependent on the object-camera distance which was required as an external input parameter. In this paper, we propose a new approach that integrates an estimation of this distance into our system by replacing the standard camera with a light-field camera.