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ift
NIFTy
Commits
8059ad4e
Commit
8059ad4e
authored
Sep 11, 2017
by
Martin Reinecke
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cleanup 2/n
parent
a76ff674
Pipeline
#18034
passed with stage
in 4 minutes and 57 seconds
Changes
1
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1
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1 changed file
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10 additions
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25 deletions
+10
-25
nifty2go/operators/smoothing_operator/direct_smoothing_operator.py
...operators/smoothing_operator/direct_smoothing_operator.py
+10
-25
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nifty2go/operators/smoothing_operator/direct_smoothing_operator.py
View file @
8059ad4e
...
...
@@ -46,7 +46,7 @@ class DirectSmoothingOperator(EndomorphicOperator):
# ---Added properties and methods---
def
_precompute
(
self
,
x
,
sigma
,
dxmax
=
None
):
def
_precompute
(
self
,
x
):
""" Does precomputations for Gaussian smoothing on a 1D irregular grid.
Parameters
...
...
@@ -54,10 +54,6 @@ class DirectSmoothingOperator(EndomorphicOperator):
x: 1D floating point array or list containing the individual grid
positions. Points must be given in ascending order.
sigma: The sigma of the Gaussian with which the function living on x
should be smoothed, in the same units as x.
dxmax: (optional) The maximum distance up to which smoothing is
performed, in the same units as x. Default is 3.01*sigma.
Returns
-------
...
...
@@ -72,8 +68,7 @@ class DirectSmoothingOperator(EndomorphicOperator):
normalized smoothing weights.
"""
if
dxmax
is
None
:
dxmax
=
self
.
_effective_smoothing_width
*
sigma
dxmax
=
self
.
_effective_smoothing_width
*
self
.
_sigma
x
=
np
.
asarray
(
x
)
...
...
@@ -81,7 +76,7 @@ class DirectSmoothingOperator(EndomorphicOperator):
nval
=
np
.
searchsorted
(
x
,
x
+
dxmax
)
-
ibegin
wgt
=
[]
expfac
=
1.
/
(
2.
*
s
igma
*
sigma
)
expfac
=
1.
/
(
2.
*
s
elf
.
_sigma
*
self
.
_
sigma
)
for
i
in
range
(
x
.
size
):
if
nval
[
i
]
>
0
:
t
=
x
[
ibegin
[
i
]:
ibegin
[
i
]
+
nval
[
i
]]
-
x
[
i
]
...
...
@@ -94,12 +89,8 @@ class DirectSmoothingOperator(EndomorphicOperator):
return
ibegin
,
nval
,
wgt
def
_apply_kernel_along_array
(
self
,
power
,
startindex
,
endindex
,
distances
,
smooth_length
,
smoothing_width
,
ibegin
,
nval
,
wgt
):
if
smooth_length
==
0.0
:
return
power
[
startindex
:
endindex
]
p_smooth
=
np
.
zeros
(
endindex
-
startindex
,
dtype
=
power
.
dtype
)
for
i
in
range
(
startindex
,
endindex
):
imin
=
max
(
startindex
,
ibegin
[
i
])
...
...
@@ -109,12 +100,10 @@ class DirectSmoothingOperator(EndomorphicOperator):
return
p_smooth
def
_apply_along_axis
(
self
,
axis
,
arr
,
startindex
,
endindex
,
distances
,
smooth_length
,
smoothing_width
):
def
_apply_along_axis
(
self
,
axis
,
arr
,
startindex
,
endindex
,
distances
):
nd
=
arr
.
ndim
ibegin
,
nval
,
wgt
=
self
.
_precompute
(
distances
,
smooth_length
,
smooth_length
*
smoothing_width
)
ibegin
,
nval
,
wgt
=
self
.
_precompute
(
distances
)
ind
=
np
.
zeros
(
nd
-
1
,
dtype
=
np
.
int
)
i
=
np
.
zeros
(
nd
,
dtype
=
object
)
...
...
@@ -130,8 +119,7 @@ class DirectSmoothingOperator(EndomorphicOperator):
holdshape
=
outshape
slicedArr
=
arr
[
tuple
(
i
.
tolist
())]
res
=
self
.
_apply_kernel_along_array
(
slicedArr
,
startindex
,
endindex
,
distances
,
smooth_length
,
smoothing_width
,
ibegin
,
nval
,
wgt
)
slicedArr
,
startindex
,
endindex
,
ibegin
,
nval
,
wgt
)
outshape
=
np
.
asarray
(
arr
.
shape
)
outshape
[
axis
]
=
endindex
-
startindex
...
...
@@ -149,8 +137,7 @@ class DirectSmoothingOperator(EndomorphicOperator):
i
.
put
(
indlist
,
ind
)
slicedArr
=
arr
[
tuple
(
i
.
tolist
())]
res
=
self
.
_apply_kernel_along_array
(
slicedArr
,
startindex
,
endindex
,
distances
,
smooth_length
,
smoothing_width
,
ibegin
,
nval
,
wgt
)
slicedArr
,
startindex
,
endindex
,
ibegin
,
nval
,
wgt
)
outarr
[
tuple
(
i
.
tolist
())]
=
res
k
+=
1
...
...
@@ -158,9 +145,9 @@ class DirectSmoothingOperator(EndomorphicOperator):
def
_smooth
(
self
,
x
,
spaces
):
# infer affected axes
# we rely on the knowledge
,
that `spaces` is a tuple with length 1.
# we rely on the knowledge that `spaces` is a tuple with length 1.
affected_axes
=
x
.
domain_axes
[
spaces
[
0
]]
if
len
(
affected_axes
)
>
1
:
if
len
(
affected_axes
)
!=
1
:
raise
ValueError
(
"By this implementation only one-dimensional "
"spaces can be smoothed directly."
)
affected_axis
=
affected_axes
[
0
]
...
...
@@ -174,6 +161,4 @@ class DirectSmoothingOperator(EndomorphicOperator):
x
.
val
,
startindex
=
0
,
endindex
=
x
.
shape
[
affected_axis
],
distances
=
distance_array
,
smooth_length
=
self
.
_sigma
,
smoothing_width
=
self
.
_effective_smoothing_width
)
distances
=
distance_array
)
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