Sliding3D(Op, dims, dimsd, nwin, nover, nop, tapertype='hanning', design=False, nproc=1)¶
3D Sliding transform operator.
Apply a transform operator
Oprepeatedly 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 3-dimensional arrays in nature as they are internally reshaped and interpreted as 3-dimensional arrays. Each patch contains in fact a portion of the array in the first and second dimensions (and the entire third dimension).
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
nover, it is recommended to use
design=Trueif unsure about the choice
dimsand use the number of windows printed on screen to define such input parameter.
Depending on the choice of nwin and nover as well as the size of the data, sliding windows may not cover the entire first and/or second dimensions. The start and end indeces of each window can be displayed using
design=Truewhile defining the best sliding window approach.
- Op :
- dims :
Shape of 3-dimensional model. Note that
dimsshould be multiple of the model sizes of the transform in the first and second dimensions
- dimsd :
Shape of 3-dimensional data
- nwin :
Number of samples of window
- nover :
Number of samples of overlapping part of window
- nop :
Number of samples in axes of transformed domain associated to spatial axes in the data
- tapertype :
Type of taper (
- design :
Print number sliding window (
True) or not (
- Sop :
Identified number of windows is not consistent with provided model shape (
- Op :