3D Reconstruction of Specular Surfaces with Interreflection

—Depth Validation by Multiple Stereo Pairs and Suppression of Interreflection by Iterative Pattern Control—

Abstract

This paper describes an active stereo method that works with interreflection on specular surfaces. We use two cameras and a projector to take two series of images for depth maps with active stereo systems. Comparing the depth maps, we judge the validity of measured depth. For the valid depth areas, we turn off corresponding pixels of the projector and again take two series of images for depth maps that suffer from less interreflection. Iterating depth estimation and projected-pattern extinctions, we could mitigate interreflection and increase measurable areas for 3D reconstruction. Experiments show the improved results of the proposed method for specular surfaces with strong interreflections.