Self-Calibration of a camera from video of a walking human (ICPR 2002)
Abstract
Analysis of human activity from a video camera is simplified by
the knowledge of the camera's intrinsic and extrinsic
parameters. We describe a technique to estimate such
parameters from image observations without requiring measurements
of scene objects. We first develop a general technique
for calibration using vanishing points and vanishing
line. We then describe a method for estimating the needed
points and line by observing the motion of a human in the
scene. Experimental results, including error estimates, are
presented.