pylops.signalprocessing.Sliding3D¶

pylops.signalprocessing.
Sliding3D
(Op, dims, dimsd, nwin, nover, nop, tapertype='hanning', design=False)[source]¶ 3D Sliding transform operator.
Apply a transform operator
Op
repeatedly to patches of the model vector in forward mode and patches of the data vector in adjoint mode. More specifically, in forward mode the model vector is divided into patches each patch is transformed, and patches are then recombined in a sliding window fashion. Both model and data should be 3dimensional arrays in nature as they are internally reshaped and interpreted as 3dimensional arrays. Each patch contains in fact a portion of the array in the first and second dimensions (and the entire third dimension).This operator can be used to perform local, overlapping transforms (e.g.,
pylops.signalprocessing.FFTN
orpylops.signalprocessing.Radon3D
) of 3dimensional arrays.Note
The shape of the model has to be consistent with the number of windows for this operator not to return an error. As the number of windows depends directly on the choice of
nwin
andnover
, it is recommended to usedesign=True
if unsure about the choicedims
and use the number of windows printed on screen to define such input parameter.Parameters:  Op :
pylops.LinearOperator
Transform operator
 dims :
tuple
Shape of 3dimensional model. Note that
dims[0]
anddims[1]
should be multiple of the model sizes of the transform in the first and second dimensions dimsd :
tuple
Shape of 3dimensional data
 nwin :
tuple
Number of samples of window
 nover :
tuple
Number of samples of overlapping part of window
 nop :
tuple
Number of samples in axes of transformed domain associated to spatial axes in the data
 tapertype :
str
, optional Type of taper (
hanning
,cosine
,cosinesquare
orNone
) design :
bool
, optional Print number sliding window (
True
) or not (False
)
Returns:  Sop :
pylops.LinearOperator
Sliding operator
Raises:  ValueError
Identified number of windows is not consistent with provided model shape (
dims
).
 Op :