ENGN 2911 I: 3D Photography and Geometry Processing Assignment 2: Structured Light for 3D Scanning

The goal of this assignment is to build a 3D scanner using one or more digital cameras and a single projector. While the “desktop scanner” [2] implemented in the previous assignment is inexpensive, it has limited practical utility. The scanning process requires manual manipulation of the stick, and the time required to sweep the shadow plane across the scene limits the system to reconstructing static objects. Manual translation can be eliminated by using a digital projector to sequentially display patterns (e.g., a single stipe translated over time). Furthermore, various structured light illumination sequences, consisting of a series of projected images, can be used to efficiently solve for the camera pixel to projector column (or row) correspondences. In this assignment you will be directly extending the algorithms and software developed in the previous homework. Similar to the “desktop scanner”, reconstruction will be accomplished using ray-plane triangulation. The key difference is that correspondences will now be established by decoding certain structured light sequences. We have provided a variety of data sets to compare the performance and assess the limitations of each sequence.