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Fixed the sign of the angle in image.rotate() method #256

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Fixed the sign of the angle in image.rotate() method #256

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20 changes: 16 additions & 4 deletions Augmentor/Operations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -666,7 +666,10 @@ def perform_operation(self, images):
rotation = random_right

def do(image):
return image.rotate(rotation, expand=self.expand, resample=Image.BICUBIC, fillcolor=self.fillcolor)
# By default, the image.rotate() method rotates the image in the anticlockwise direction for a positive rotation angle.
# To rotate the image in the clockwise direction, provide a negative rotation angle.
# return image.rotate(rotation, expand=self.expand, resample=Image.BICUBIC, fillcolor=self.fillcolor)
return image.rotate(-rotation, expand=self.expand, resample=Image.BICUBIC, fillcolor=self.fillcolor)

augmented_images = []

Expand Down Expand Up @@ -723,9 +726,15 @@ def perform_operation(self, images):

def do(image):
if self.rotation == -1:
return image.rotate(90 * random_factor, expand=True)
# By default, the image.rotate() method rotates the image in the anticlockwise direction for a positive rotation angle.
# To rotate the image in the clockwise direction, provide a negative rotation angle.
# return image.rotate(90 * random_factor, expand=True)
return image.rotate(-1*90 * random_factor, expand=True)
else:
return image.rotate(self.rotation, expand=True)
# By default, the image.rotate() method rotates the image in the anticlockwise direction for a positive rotation angle.
# To rotate the image in the clockwise direction, provide a negative rotation angle.
# return image.rotate(self.rotation, expand=True)
return image.rotate(-self.rotation, expand=True)

augmented_images = []

Expand Down Expand Up @@ -812,8 +821,11 @@ def do(image):
x = image.size[0]
y = image.size[1]

# By default, the image.rotate() method rotates the image in the anticlockwise direction for a positive rotation angle.
# To rotate the image in the clockwise direction, provide a negative rotation angle.
# Rotate, while expanding the canvas size
image = image.rotate(rotation, expand=True, resample=Image.BICUBIC)
# image = image.rotate(rotation, expand=True, resample=Image.BICUBIC)
image = image.rotate(-rotation, expand=True, resample=Image.BICUBIC)

# Get size after rotation, which includes the empty space
X = image.size[0]
Expand Down