Two-dimensional coordinates of a point in a building structure obtained from a 2D scanner can
have maximum error of about 25 mm. To exploit the advantages of the relatively new technology in
field of structural health monitoring, it is necessary to improve the accuracy of 2D scanners. To
minimize such errors in coordinate information, in this paper, an adjacent averaging technique is used
for smoothing the data from the 2D scanner. In the adjacent averaging, a data point in measured data is
replaced by the average of m dada points around the point. Then, for a given number m of data points
to be averaged, the displacement at the jth point obtained for the ith scanning in Equation (4) is
replaced by the average in Equation (5):