Comparison study of the biorthogonal spline wavelet filtering for areal rough surfaces

Research into techniques for areal surface analysis has recently included w avelet filtering. The requirements for filtering surface analysis include: linear phase shift; finite pulse response and perfect reconstruction-only b iorthogonal wavelets satisfy these conditions. The biorthogonal spline wave let is considered for areal surface characterisation due to the curvature o f the surfaces considered as examples. In this paper, the models and algori thms of biorthogonal B-spline and cubic spline wavelets are introduced. The lifting algorithm is used as a simple tool for design of spline wavelets. Bioengineering surfaces are used to test and compare the two kinds of wavel et filters to obtain the rough surfaces. (C) 2001 Elsevier Science Ltd. All rights reserved.