Which is the best representation of an image, wavelet transform or S-transform?

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Hana Elenany

An interesting tutorial on S transform and its relation to wavelet transform

http://djj.ee.ntu.edu.tw/S_Transform.pdf

Saka Harshavardhan

wavelet transform will decompose image into LL,LH,HL,HH subband images. Does s- transform also do like that or any thing else.

Ajay K. Mandava

Yes Harshavardhan, S-tranfrom will do like wavelet transform. S transform is variable window of short time Fourier transform: an extension of wavelet transform

Rocco Ditommaso

Generally, S-Transform provide a better resolution in both time and frequency domain. It is possible to demonstrate that Wavelet Transform is a special case of the S-Transform. Moreover, using S-Transform you can directly evaluate the local spectrum of the signal without using any empirical relationship between the scale factor and frequency.