Simultaneous independent image display technique on multiple 3D objects

TL;DR

This paper introduces a system that uses multiple projectors to display different, depth-dependent images on complex 3D objects, enabling high-resolution, spatially varying visualizations for practical applications.

Contribution

The paper presents a novel multi-projector system with an optimization technique for high-resolution, depth-dependent image projection on complex 3D shapes, extending previous limited flat-plane methods.

Findings

Effective projection of different images on complex 3D objects

High-resolution images achieved on intricate geometries

System demonstrated as a visual aid for object assembly

Abstract

We propose a new system to visualize depth-dependent patterns and images on solid objects with complex geometry using multiple projectors. The system, despite consisting of conventional passive LCD projectors, is able to project different images and patterns depending on the spatial location of the object. The technique is based on the simple principle that multiple patterns projected from multiple projectors interfere constructively with each other when their patterns are projected on the same object. Previous techniques based on the same principle can only achieve 1) low resolution volume colorization or 2) high resolution images but only on a limited number of flat planes. In this paper, we discretize a 3D object into a number of 3D points so that high resolution images can be projected onto the complex shapes. We also propose a dynamic ranges expansion technique as well as an efficient optimization procedure based on epipolar constraints. Such technique can be used to the extend projection mapping to have spatial dependency, which is desirable for practical applications. We also demonstrate the system potential as a visual instructor for object placement and assembling. Experiments prove the effectiveness of our method.