Abstract
This paper carries out a preliminary study on utilizing observation cameras to meet the demand for the quickness in evaluating urban earthquake disaster. The key issue is the examination of the high-accuracy and high-speed in measuring displacement by means of image analysis. The properties of the pixel data taken for buildings and building edges are quantitatively analyzed in this paper. The applicability of GIS to set a window for image analysis is proposed to reduce the computation cost. Also an experimental evaluation of sub-pixel edge detector is performed.
