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Fix image interpolation #8966

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Merged
merged 8 commits into from
Aug 31, 2017
Merged

Fix image interpolation #8966

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12c27f3
FIX: re-work image interpolation
tacaswell Jul 30, 2017
63da377
TST: update rotated image test
tacaswell Aug 29, 2017
2509030
TST: update test images
tacaswell Aug 29, 2017
ec43d0e
TST: update masked interpolation images
tacaswell Aug 29, 2017
856556f
TST: add comment to test about ringing
tacaswell Aug 29, 2017
b5238ac
FIX: handle degenerate case of all equal values
tacaswell Aug 30, 2017
346bb1a
FIX: make image.set_clim mark the figure as stale
tacaswell Aug 30, 2017
1aebff1
TST: add flat-field test
tacaswell Aug 31, 2017
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FIX: handle degenerate case of all equal values
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@tacaswell
tacaswell committed Aug 30, 2017
commit b5238acb74f039067651b048853a959cd9a5124e
6 changes: 4 additions & 2 deletions 6 lib/matplotlib/image.py
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Original file line number Diff line number Diff line change
Expand Up @@ -387,7 +387,8 @@ def _make_image(self, A, in_bbox, out_bbox, clip_bbox, magnification=1.0,
A_scaled = np.empty(A.shape, dtype=scaled_dtype)
A_scaled[:] = A
A_scaled -= a_min
A_scaled /= ((a_max - a_min) / 0.8)
if a_min != a_max:
A_scaled /= ((a_max - a_min) / 0.8)
A_scaled += 0.1
A_resampled = np.zeros((out_height, out_width),
dtype=A_scaled.dtype)
Expand All @@ -408,7 +409,8 @@ def _make_image(self, A, in_bbox, out_bbox, clip_bbox, magnification=1.0,
# below, but possibly clipped in the case of higher order
# interpolation + drastically changing data.
A_resampled -= 0.1
A_resampled *= ((a_max - a_min) / 0.8)
if a_min != a_max:
A_resampled *= ((a_max - a_min) / 0.8)
A_resampled += a_min
# if using NoNorm, cast back to the original datatype
if isinstance(self.norm, mcolors.NoNorm):
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