Image-based height measuring system

Authors:
Wei-Yen Wang;Ming-Chih Lu;Chin-Tun Chuang;Jen-Chi Cheng
Affiliations:
Institute of Applied Electronics Technology, National Taiwan Normal University, Taipei, Taiwan;Department of Electronic Engineering, St. John's University, Tamsui, Taipei County, Taiwan;Department of Mechanical and Computer-Aided Engineering, St. John's University, Tamsui, Taipei County, Taiwan;Department of Electronic Engineering, Fu-Jen Catholic University, Taipei, Taiwan
Venue:
ISCGAV'07 Proceedings of the 7th WSEAS International Conference on Signal Processing, Computational Geometry & Artificial Vision
Year:
2007

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Abstract

In this paper, a new distance measuring method to measure the height of a building is proposed. Traditionally, distance measuring using CCD is based on the parallax method. This paper puts forward a method of measuring the width and height of a building regardless of the distance of the camera or the angle between optical axis and ground. By using two parallel laser spots, the distance from the camera to the building and the height of the building can be determined in a single photo session and with a single picture. Experiments show that even highly non-orthogonal pictures taken from a short distance can be used to determine the height of a building. The result will not be affected by the angle between the camera's optical axis, the ground and the measured surface.