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:

The coefficients in y are arranged as follows.

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)