Low cost 3D shape acquisition system using strip shifting pattern

Abstract

We present a simple and low cost 3D shape acquisition method that can measure the objects with interreflection and high light. The capture system employs a projector to project line shifting shadow on the object, and a digital camera to record videos (image sequence) of the object and the distorted shadow. A novel spacetime edge finding method is introduced to get the shadow edge accurately and overcome the interreflection and high light. The 3D data of the object are got by using the spacetime information. A post-processing 3D filter is proposed to filter the bad data. The 3D filter makes full use of the neighborhoods' geometric constrains and the view point constrain. © Springer-Verlag Berlin Heidelberg 2007.