The traditional approach of handling motion tracking and structure from motion (SFM) independently in successive steps exhibits inherent limitations in terms of achievable precision and incorporation of prior geometric constraints about the scene. This paper proposes a projections onto convex sets (POCS) framework for iterative re nement of the measurement matrix in the well-known factorization...

We present a two stage technique for estimation of rigid body motion and scene structure from monocular image sequences. The robustness of motion recovery is considerably increased by motion dependent distortion of rectangular measurement windows. In the rst stage, we estimate a set of candidate motion parameter sets from which the optimum is determined in a second step evaluating motion based ...

The primary goal of this study is to find a measurement method for motion blur which is easy to carry out and gives results that can be reproduced from one lab to another. This method should be able to also take into account methods for reduction of motion blur such as backlight flashing. Two methods have been compared. The first method uses a high speed camera that permits us to directly pictu...

Capacitive tactile sensors are constructed and installed to the ngers of the HKUST hands for measurement of position, force and direction of principle curvature of contact point. The hardware and software for signal processing are designed such that the contact information is sent to the motion control computer in real time. Experiments in rolling and sliding contact motions are then performed ...

INTRODUCTION The surface method of measuring lower thoracic and lumbar spine motion with Fastrak ® was examined for validity. There is an increasing awareness of the health risks of exposure to radiation associated with repeated radiographic assessment of spinal curvature and spinal movements. As a skin-surface measurement device, Fastrak ® was employed to study the effect of low bone mineral d...

The factorization method is a technique for recovering 3-D shape of an undeformable object without using camera parameters. The technique is extended to an efficient method in this paper for recovering 3-D motion of a deformable object, i.e., a human. The proposed system is composed of three fixed video cameras which take video images of a human motion. Three obtained image sequences are analyz...