Determination of confidence interval of 3-D data and repair of abnormal data
Liu Zhang-wen, Ren Tian-yi · Computer Integrated Manufacturing Systems · 2005
A Chord Vector Method (CVM) was proposed to determine the Confidence Interval (CI) of the 3-D data and repair abnormal data. Using the contiguous points of the chosen point in the 3-D geometric curve surface, the two Chord Vectors (CV), perpendicular to each other were obtained, meanwhile the two Chord Vector Arrays (CVAs) were obtained by selecting a rectangle area of the curve surface. The unequal intervals CVAs were calibrated. Then, the CI of the measured data was determined by performing the statistic analysis for the equivalent CVAs. The repair of abnormal data was performed according to the CI. Finally, after the analysis of measured data of two objects, the effectiveness of the method for repair of abnormal data had been verified.