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fix luminance computation

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This commit is contained in:
Tim Kuipers 2019-05-20 14:21:05 +02:00
parent b88183f4a1
commit 2b55b85a12
1 changed files with 4 additions and 2 deletions
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6
plugins/ImageReader/ImageReader.py
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@ -101,8 +101,10 @@ class ImageReader(MeshReader):
for x in range(0, width):
for y in range(0, height):
qrgb = img.pixel(x, y)
luminance = (0.2126 * qRed(qrgb) + 0.7152 * qGreen(qrgb) + 0.0722 * qBlue(qrgb)) / 255 # fast computation ignoring gamma
height_data[y, x] = luminance
if use_logarithmic_function:
height_data[y, x] = (0.299 * math.pow(qRed(qrgb) / 255.0, 2.2) + 0.587 * math.pow(qGreen(qrgb) / 255.0, 2.2) + 0.114 * math.pow(qBlue(qrgb) / 255.0, 2.2))
else:
height_data[y, x] = (0.212655 * qRed(qrgb) + 0.715158 * qGreen(qrgb) + 0.072187 * qBlue(qrgb)) / 255 # fast computation ignoring gamma and degamma
Job.yieldThread()