74a015d1d4
radon transform: when circle=True, ignore values outside circle without throwing an error ( closes #1808 )
2015-12-14 17:13:29 -08:00
3a1079a180
Misc PEP8 fixes
2014-12-14 02:56:14 +01:00
d5b72f91ab
iradon: Do not suppress 0 frequency for filter=None.
2013-07-14 17:40:17 +02:00
4549204507
iradon: Clean up filter code.
2013-07-14 17:39:48 +02:00
60444ee4d3
Radon transform: PEP8 fixes.
2013-07-13 20:32:15 +02:00
462173a53a
Radon transform: Include boundary in reconstruction circle.
...
A test criterion needed to be relaxed slightly to have tests still
passing. This is ok, as the reconstruction circle is now larger, meaning
larger errors should be expected. Moreover, the test in question uses
random data, and changing the seed causes greater changes in accuracy
than the amount the test criterion was relaxed by.
2013-07-13 20:32:15 +02:00
288ee69483
radon: Correct docstring of order_angles_golden_ratio.
2013-07-13 20:32:15 +02:00
41c6f6d740
radon: Reduce duplication; simplifications.
2013-07-13 20:32:13 +02:00
47b6d0c5a6
Radon transform: Document rotation axis location.
2013-07-13 20:31:28 +02:00
2bfaafd9e2
Radon transform: Redefine projection center for sinograms.
...
This definition is chosen because it is simple to express in the
documentation. No changes in accuracy are to be expected, but comparing
sinograms and reconstructions before and after this commit will give
different results in the cases where ``circle=False`` for ``radon`` or
``iradon``.
2013-07-13 19:31:43 +02:00
4d307f5315
iradon_sart: Fix docstring typo.
2013-07-09 11:44:28 +02:00
1cc42bd943
iradon_sart: Reformat references.
2013-07-09 11:44:03 +02:00
18a06a0add
iradon_sart: Format docs correctly.
2013-07-08 14:50:06 +02:00
bea50aa608
iradon: use util.pad for sinogram padding.
2013-07-06 20:55:54 +02:00
b3746b9090
iradon: Cleanup by locating related code in one place.
2013-07-06 20:55:54 +02:00
b90ba783ef
iradon: Only allow interpolation methods working well.
...
Of the interpolation methods provided by scipy.interpolate.interp1d,
only cubic has been found to work well with the tests in skimage (other
methods are either identical to linear or nearest, or they produce bad
reconstructions).
2013-07-06 20:55:53 +02:00
2be327815e
radon: Use numpy.interp/scipy.interpolate.
...
Scipy supports all interpolation kinds (nearest, linear) we need, while
numpy supports only linear interpolation. The numpy interpolation is
substantially faster, so this is used even though it complicates the
code slightly.
2013-07-06 20:55:53 +02:00
5955e4e612
iradon: Reduce code duplication.
2013-07-06 20:55:53 +02:00
ac460a9777
iradon: Use util.pad for array padding.
...
This depends on util.pad accepting 0s in pad_width, which has a proposed
solution in gh-634.
2013-07-06 20:55:53 +02:00
237fb989b0
radon: Use util.pad for array padding.
2013-07-06 20:55:53 +02:00
af47941435
iradon_sart: fix comment spelling.
2013-07-05 13:14:39 +02:00
a4870242b6
iradon_sart: Test clip functionality and add a test for it.
2013-07-05 13:14:39 +02:00
266b202226
iradon_sart: Style fixes.
2013-07-05 13:14:38 +02:00
2082b57e41
iradon_sart: Order angles using a golden ratio approach.
2013-07-05 13:14:38 +02:00
dcd31c1882
radon_transform: Declare encoding.
2013-07-05 13:14:38 +02:00
8d4b1e6710
iradon_sart: Add Kaczmarz reference and reformat citations.
2013-07-05 13:14:38 +02:00
c977c5974d
iradon_sart: Improve argument checking.
2013-07-05 13:14:38 +02:00
94eba1c911
iradon_sart: Clarify how constants are chosen.
2013-07-05 13:14:38 +02:00
496902145f
iradon_sart: Add wikipedia reference to Kaczmarz method.
2013-07-05 13:14:38 +02:00
372f0127f9
transform.iradon_sart: Clean up code for ordering projections.
2013-07-05 13:14:38 +02:00
b474804654
Fix docstrings for transform.iradon_sart with subroutines.
2013-07-05 13:14:38 +02:00
1e1dd180d2
Implement projection shifts.
2013-07-05 13:14:38 +02:00
9484afeed1
Add SART tomography reconstruction to radon_transform.
2013-07-05 13:14:38 +02:00
4b25c48245
transform.iradon: Correct determination of center of projection.
2013-06-23 12:48:14 +02:00
cca66a04ef
transform.radon: Robust determination of center of projection.
2013-06-23 12:48:14 +02:00
b8a6b4fa00
radon_transform: Stylistic changes.
2013-06-23 12:48:13 +02:00
b61ff7513e
transform.iradon: Refactoring for shorter functions.
...
Will facilitate testing.
2013-06-23 12:48:13 +02:00
131cfc73ed
transform.iradon: Redefine slice and projection center.
...
These changes should match those made to radon.
2013-06-23 12:48:13 +02:00
a44f1d4ef9
transform.radon: Consistent definition of center of array.
...
The center is now defined as shape[i] // 2.
2013-06-23 12:48:13 +02:00
380c916c92
transform.radon: Use correct padding for rectangular images.
2013-06-23 12:48:13 +02:00
28de2f978a
transform.radon: Remove unneccesary matrix inverse.
2013-06-23 12:48:13 +02:00
bec5a20441
Style improvements in docstrings in transform.radon_transform
2013-05-27 20:43:51 +02:00
c9ae913d32
PEP8 style changes for transform.radon_transform and its tests
2013-05-27 20:42:59 +02:00
8208293c93
Correct documentation and string formatting.
2013-05-26 21:21:33 +02:00
5876d80414
Add reconstruction circle option to transform.iradon.
2013-05-26 19:48:16 +02:00
b872648441
Add reconstruction circle option to transform.radon.
2013-05-26 19:48:16 +02:00
772a1cb4b0
Update radon transform with new warp function
2012-08-27 13:31:33 +02:00
4fe9f39c45
Fix shape format of arrays in doc strings
2012-08-26 00:16:52 +02:00
1dcc172f60
TST: Check number of input angles in radon tf.
2012-07-09 11:29:37 -07:00
46e959a9d9
COSMIT some manual pep8, removed unused imports, removed unused variables and fixed a bug in a ValueError statement.
2012-06-29 11:27:23 +02:00
Stefan van der Walt