Qualitative Description of Camera Motion and Scene Depth from Histograms of Normal Flow
Abstract
If we histogram the normal flow vectors in images of a scene viewed by a moving observer, we can use the time varying histogram to derive qualitative information about the observer's motion; for example, whether it is (primarily) translational or rotational, and whether the direction of translation or axis of rotation is (roughly) parallel or perpendicular to the camera axis. This is illustrated using flow histograms obtained from a variety of real image sequences. If the motion is translational, qualitative information about the scene depth can also be obtained from the flow histograms; for example, whether the scene depth is unimodal or bimodal. This is illustrated for real scenes containing a layer of vegetation seen against a textured background, or two layers of vegetation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1998
- Accession Number
- ADA353730
Entities
People
- Azriel Rosenfeld
- Ehud Rivlin
- Peter Cucka
- Zoran Duric
Organizations
- University of Maryland