Review and Comparison of High-Dynamic Range Three-Dimensional Shape Measurement Techniques

Jian Gao,Yunbo He,Hui Lin,Xin Chen,Yan Liu,Guanjin Zhang

doi:10.1155/2017/9576850

Abstract

In the last decade, a significant number of techniques for three-dimensional (3D) shape measurement have been proposed. There are a large number of measurement demands for metallic workpieces with shiny surfaces in industrial applications; however, such shiny surfaces cannot be directly measured using the conventional structured light method. Therefore, various techniques have been investigated to solve this problem over the last few years. Some reviews summarize the different 3D imaging techniques; however, no comprehensive review exists that provides an insight into high-dynamic range (HDR) 3D shape measurement techniques used for shiny surfaces. We present a survey of recent HDR techniques for the digitization of shiny surfaces and classify and discuss the advantages and drawbacks of different techniques with respect to each other.

Highlights

Three-dimensional (3D) shape measurement is an important topic that has been investigated to a large extent
We review various high-dynamic range (HDR) techniques that were recently developed for the measurement of shiny surfaces, discuss the advantages and drawbacks of different techniques with respect to each other, and assess the current state-of-the-art techniques in the field
This paper presents a survey of recent HDR techniques for the digitization of shiny surfaces

Summary

Introduction

Three-dimensional (3D) shape measurement is an important topic that has been investigated to a large extent. The structured light method is one of the most widely used 3D shape measurement techniques owing to the advantages of fullfield inspection, high resolution, and accuracy that it offers [5]. For a different surface material, such as a metallic workpiece shown, we can see in Figure 2(b) that only regions with strong reflection can provide measurable fringe patterns, while other regions cannot been imaged by the. One method to solve this problem is to use the CMM to measure the workpiece, and the other is to spray a thin layer of powder onto the workpiece to make its surface diffuse prior to measurement by the structured light method This supplementary step is troublesome and time-consuming because the workpiece needs to be cleaned afterward.

HDR Techniques

Findings

Discussion

Conclusion