Additional functions: the functions module
Additional functions for PyAstraToolbox.
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astra.functions.add_noise_to_sino(sinogram_in, I0)[source]
Adds Poisson noise to a sinogram.
| Parameters: |
- sinogram_in (numpy.ndarray) – Sinogram to add noise to.
- I0 (float) – Background intensity. Lower values lead to higher noise.
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| Returns: | numpy.ndarray – the sinogram with added noise.
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astra.functions.clear()[source]
Clears all used memory of the ASTRA Toolbox.
Note
This is irreversible.
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astra.functions.data_op(op, data, scalar, gpu_core, mask=None)[source]
Perform data operation on data.
| Parameters: |
- op – Operation to perform.
- data – Data to perform operation on.
- scalar – Scalar argument to data operation.
- gpu_core – GPU core to perform operation on.
- mask – Optional mask.
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astra.functions.geom_2vec(proj_geom)
Returns a vector-based projection geometry from a basic projection geometry.
| Parameters: | proj_geom (dict) – Projection geometry to convert |
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astra.functions.geom_size(geom, dim=None)[source]
Returns the size of a volume or sinogram, based on the projection or volume geometry.
| Parameters: |
- geom – Geometry to calculate size from
- dim (int) – Optional axis index to return
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