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Module « scipy.signal »

Fonction wiener - module scipy.signal

Signature de la fonction wiener

def wiener(im, mysize=None, noise=None) 

Description

help(scipy.signal.wiener)

Perform a Wiener filter on an N-dimensional array.

Apply a Wiener filter to the N-dimensional array `im`.

Parameters
----------
im : ndarray
    An N-dimensional array.
mysize : int or array_like, optional
    A scalar or an N-length list giving the size of the Wiener filter
    window in each dimension.  Elements of mysize should be odd.
    If mysize is a scalar, then this scalar is used as the size
    in each dimension.
noise : float, optional
    The noise-power to use. If None, then noise is estimated as the
    average of the local variance of the input.

Returns
-------
out : ndarray
    Wiener filtered result with the same shape as `im`.

Notes
-----
This implementation is similar to wiener2 in Matlab/Octave.
For more details see [1]_

References
----------
.. [1] Lim, Jae S., Two-Dimensional Signal and Image Processing,
       Englewood Cliffs, NJ, Prentice Hall, 1990, p. 548.

Examples
--------
>>> from scipy.datasets import face
>>> from scipy.signal import wiener
>>> import matplotlib.pyplot as plt
>>> import numpy as np
>>> rng = np.random.default_rng()
>>> img = rng.random((40, 40))    #Create a random image
>>> filtered_img = wiener(img, (5, 5))  #Filter the image
>>> f, (plot1, plot2) = plt.subplots(1, 2)
>>> plot1.imshow(img)
>>> plot2.imshow(filtered_img)
>>> plt.show()

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