.. _tutorial:

Tutorial
========

2D Example:

>>> from scipy.misc import lena
>>> import matplotlib.pyplot as plt
>>> from rwt import dwt, idwt
>>> from rwt.wavelets import daubcqf
>>> img = lena()
>>> h0, h1 = daubcqf(4, 'min')
>>> L = 1
>>> y, L = dwt(img, h, L)
>>> plt.imshow(y)
>>> plt.show()

2D Example's output and explanation:

.. image:: ../images/lena_dwt.png

The coefficients in y are arranged as follows.

.. image:: ../images/coef_table.png
   
where:

 1. High pass vertically and high pass horizontally
 
 2. Low pass vertically and high pass horizontally
 
 3. High pass vertically and low  pass horizontally
 
 4. Low pass vertically and Low pass horizontally (scaling coefficients)