This archive contains:
1) dcst2.m: this function computes the 2-dimensional discrete cosine Stockwell coefficients of a given 2-dimensional signal, i.e. a picture;
2) idcst2.m: this function reconstruct the original signal from its discrete cosine Stockwell coefficients;
3) dcst2_tutorial.m: it provides an example on how to use the 2-dimensional discrete cosine Stockwell transform to analyze the classical "lena picture".
The DCST2 and IDCST2 are FFT-FAST (O(NlogN)).
More comments on the 2 dimensional S-transform, references and a detailed description of the algorithms used are given as comments in the m-files.
The DCST is, roughly speaking, the DOST in which the FFT is substituted with the DCT.
DCST2 and IDCST2 are based on DCST and IDCST from the same authors.
Luigi Riba (2021). 2-dimensional DCST.zip (https://www.mathworks.com/matlabcentral/fileexchange/47225-2-dimensional-dcst-zip), MATLAB Central File Exchange. Retrieved .
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