def _image_processing(self, image):
b = self.brightness
assert image.dtype == numpy.uint8
assert -1 <= b <= 1
image = image.copy()
with OverflowPreventer(image) as img:
img += int(b * 256)
return image
def _image_processing(self, image):
assert image.dtype == numpy.uint8
image = image.copy()
s, c = self.scale, self.center
c = int(c * 256)
with OverflowPreventer(image) as img:
if s <= 1:
img *= s
img += int(c * (1 - s))
else:
img -= c * (1 - 1 / s)
img *= s
return image