Patch2D(Op, dims, dimsd, nwin, nover, nop, tapertype='hanning', design=False)¶
2D Patch 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 together. Both model and data are internally reshaped and interpreted as 2-dimensional arrays: each patch contains a portion of the array in both the first and second 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, patches may not cover the entire size of the data. The start and end indices of each window can be displayed using
design=Truewhile defining the best patching approach.
- Op :
- dims :
Shape of 2-dimensional model. Note that
dimsshould be multiple of the model size of the transform in their respective dimensions
- dimsd :
Shape of 2-dimensional data
- nwin :
Number of samples of window
- nover :
Number of samples of overlapping part of window
- nop :
Size of model in the transformed domain
- tapertype :
Type of taper (
- design :
Print number of sliding window (
True) or not (
- Sop :
Identified number of windows is not consistent with provided model shape (
- 2D Sliding transform operator.
- Op :