Review and comparison of high-dynamic range three-dimensional shape measurement techniques

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. © 2017 hui lin et al.