Howtosignalprocessing
What does discrete wavelet transform do?
A discrete wavelet transform (DWT) is a transform that decomposes a given signal into a number of sets, where each set is a time series of coefficients describing the time evolution of the signal in the corresponding frequency band.
Why is DWT used?
DWT provides a simultaneous spatial and frequency domain information of the image. In DWT operation, an image can be analyzed by the combination of analysis filter bank and decimation operation. The analysis filter bank consists of a pair of low and high pass filters corresponding to each decomposition level.
How to install pywt in Python?
To install PyWavelets open shell prompt and type pip install PyWavelets or easy_install PyWavelets. To build and install from source, navigate to downloaded PyWavelets source code directory and type python setup.py install.
