Determining the translational speed of a camera from time-varying optical flow
Date
2007
Authors
Van Den Hengel, A.
Chojnacki, W.
Brooks, M.
Editors
Jahne, B.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Complex motion [electronic resource] : first international workshop, IWCM 2004, Günzburg, Germany, October 12-14, 2004 : revised papers / Bernd Jähne, Rudolf Mester, Erhardt Barth and Hanno Scharr (eds.), pp. 190-197.
Statement of Responsibility
Anton van den Hengel, Wojciech Chojnacki and Michael J. Brooks
Conference Name
International Workshop on Complex Motion (1st : 2004 : Günzdurg, Germany)
Abstract
Under certain assumptions, a moving camera can be self-calibrated solely on the basis of instantaneous optical flow. However, due to a fundamental indeterminacy of scale, instantaneous optical flow is insufficient to determine the magnitude of the camera’s translational velocity. This is equivalent to the baseline length indeterminacy encountered in conventional stereo self-calibration. In this paper we show that if the camera is calibrated in a certain weak sense, then, by using time-varying optical flow, the velocity of the camera may be uniquely determined relative to its initial velocity. This result enables the calculation of the camera’s trajectory through the scene over time. A closed-form solution is presented in the continuous realm, and its discrete analogue is experimentally validated.
School/Discipline
Dissertation Note
Provenance
Description
The original publication is available at www.springerlink.com