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 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.

• Type: Conference
• Year: 2002
• Where: ICPR
• Authors: Fengjun Lv, Tao Zhao, Ramakant Nevatia
• Keywords: Extrinsic Parameters, Human Activity, ICPR 2002, Video Camera