Module « scipy.signal »

Fonction spline_filter - module scipy.signal

Signature de la fonction spline_filter

def spline_filter(Iin, lmbda=5.0) 

Description

spline_filter.__doc__

Smoothing spline (cubic) filtering of a rank-2 array.

    Filter an input data set, `Iin`, using a (cubic) smoothing spline of
    fall-off `lmbda`.

    Parameters
    ----------
    Iin : array_like
        input data set
    lmbda : float, optional
        spline smooghing fall-off value, default is `5.0`.

    Returns
    -------
    res : ndarray
        filterd input data

    Examples
    --------
    We can filter an multi dimentional signal (ex: 2D image) using cubic
    B-spline filter:

    >>> from scipy.signal import spline_filter
    >>> import matplotlib.pyplot as plt
    >>> orig_img = np.eye(20)  # create an image
    >>> orig_img[10, :] = 1.0
    >>> sp_filter = spline_filter(orig_img, lmbda=0.1)
    >>> f, ax = plt.subplots(1, 2, sharex=True)
    >>> for ind, data in enumerate([[orig_img, "original image"],
    ...                             [sp_filter, "spline filter"]]):
    ...     ax[ind].imshow(data[0], cmap='gray_r')
    ...     ax[ind].set_title(data[1])
    >>> plt.tight_layout()
    >>> plt.show()