Multi-Scale Edge Detection of Crack in Extra-High Arch Dam Based on Orthogonal Wavelet Construction

This paper conducts a research on the wavelet construction and application of image edge detection. Taking detection algorithm based modulus maxima as subject, this discusses problem dislocation phenomenon, threshold selection, multi-scale fusion evaluation criterion in algorithm, proposes an improved self-adaptive hierarchical information amount vanishing moment. From angle symmetry, filter composition moment, influence property is studied, requirements banks for are proposed. The constant-length compactly supported biorthogonal parameterized method used to construct featuring odd symmetry high-pass decomposition unidirectionality sequence, applied simulation concrete cracks ultra-high arch dam.