Self-Calibration of a Camera from Video of a Walking Human
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
We first develop a general technique for calibration using vanishing points
and vanishing lines. We then describe a method for estimating the needed points and lines
by observing the motion of a human in the scene. Experimental results, including error
estimates, are presented.