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Fix: avoid division by 0 when image is single valued

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This commit is contained in:
Luke Campagnola 2017-10-02 08:58:03 -07:00
parent 6e22524ac2
commit fcf4503671
1 changed files with 3 additions and 1 deletions
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4
pyqtgraph/functions.py
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@ -1079,7 +1079,9 @@ def makeARGB(data, lut=None, levels=None, scale=None, useRGBA=False):
minVal, maxVal = levels[i]
if minVal == maxVal:
maxVal += 1e-16
newData[...,i] = rescaleData(data[...,i], scale/(maxVal-minVal), minVal, dtype=dtype)
rng = maxVal-minVal
rng = 1 if rng == 0 else rng
newData[...,i] = rescaleData(data[...,i], scale / rng, minVal, dtype=dtype)
data = newData
else:
# Apply level scaling unless it would have no effect on the data