Specification of a wavelet for multiscale analysis of discrete boundary (ouvre dans un nouvel onglet)

Résumé

Deals with the specification of a wavelet for the representation of a discrete contour coded by Freeman chain code. Multiresolution analysis is a functional framework which allows one to build wavelets and to choose which wavelet to use for a given application. The discrete version of data in image processing domain has to be conserved and it needs specific algorithms and tools. The aim is to consider a discrete contour coded by Freeman sequence and to approximate it at several levels of resolution by use of an adapted wavelet. The authors compute the wavelet's coefficients which can be used to reconstruct the original discrete contour. Examples of implementation results with evaluation of entropy and fidelity of reconstruction are presented.>