Approaches to the Depth Recovery Problem

Abstract

In this chapter, the various approaches used to recover depth information are discussed. The first section describes the different sensing modalities that can be used. The second section describes some of the merits and limitations of choosing vision as a primary mode of sensing, and the final section in this chapter is a review of existing vision-based approaches to the depth recovery problem. The primary works in the areas of stereo, optical flow, analysis of spatio-temporal solids, and depth from focus are described, as well as several other approaches. Table 2.1, included at the end of this chapter, provides a qualitative summary of the features and limitations of many of the approaches described in this chapter.