What is ISO 16610-29- Wavelets about?
ISO 16610-29 specifies biorthogonal wavelets for profiles and contains the relevant concepts.
ISO 16610-29 gives the basic terminology for biorthogonal wavelets of compact support, together with their usage.
Who is ISO 16610-29 - Wavelets for?
ISO 16610-29 on linear profile filters is beneficial for:
- Manufacturers of measuring instruments
- Electronics engineers
- People working for transmission technology
- Telecommunications industries
- Designers and metrologists
- Chemical engineers
- Geoscience data processors
Why should you use ISO 16610-29 - Wavelets?
ISO 16610-29 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard.
ISO 16610-29 influences chain-link C of the chains of standards on profile and areal surface texture. ISO 16610-29 develops the terminology and concepts for wavelets. Wavelet analysis consists of decomposing a profile into a linear combination of wavelets ga,b(x), all generated from a single mother wavelet. This is like Fourier analysis, which decomposes a profile into a linear combination of sinewaves. In ISO 16610-29 a cubic b-spline function is used, which has compact support. The lifting scheme is used to define a fast in-place wavelet transform. Starting with the original profile, each rung in the multiresolution ladder is calculated from the previous rung in three stages. These stages are called:
- Splitting
- Prediction
- Updating
Overall, ISO 16610-29 is useful as it provides guidance on lifting schemes which uses cubic interpolation for the wavelet transform. ISO 16610-29 defines the basic terminology for spline wavelets filters.
What’s changed since the last update?
BS EN ISO 16610-29:2020 supersedes BS EN ISO 16610-29:2015, which is withdrawn.
BS EN ISO 16610-29:2020 cancels and replaces the first edition (ISO 16610-29:2015), which has been technically revised.
The main changes compared to the previous edition are as follows:
- The terminology and requirements around wavelets have been clarified and expanded to cover biorthogonal wavelets more fully
- The requirements for cubic prediction wavelets are set out in Annex A
- The requirements for cubic b-spline wavelets are given in Annex B
