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Allow full crop #79

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22bfcb9
fix full crop
rctzeng Feb 28, 2018
f99266c
move random out of the inner function
rctzeng Feb 28, 2018
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27 changes: 14 additions & 13 deletions Augmentor/Operations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -846,21 +846,22 @@ def perform_operation(self, images):
:return: The transformed image(s) as a list of object(s) of type
PIL.Image.
"""


# The images must be of identical size, which is checked by Pipeline.ground_truth().
w, h = images[0].size

diff_w, diff_h = w - self.width, h - self.height

sign_w, sign_h = np.sign(diff_w), np.sign(diff_h)

left_shift = sign_w * random.randint(0, int(sign_w * diff_w))
down_shift = sign_h * random.randint(0, int(sign_h * diff_h))

def do(image):

w, h = image.size

# TODO: Fix. We may want a full crop.
if self.width > w or self.height > h:
return image

if self.centre:
return image.crop(((w/2)-(self.width/2), (h/2)-(self.height/2), (w/2)+(self.width/2), (h/2)+(self.height/2)))
else:
left_shift = random.randint(0, int((w - self.width)))
down_shift = random.randint(0, int((h - self.height)))
return image.crop((left_shift, down_shift, self.width + left_shift, self.height + down_shift))
top_left_x, top_left_y = min(diff_w, w - diff_w), min(diff_h, h - diff_h)
return image.crop((top_left_x, top_left_y, w - top_left_x, h - top_left_y))
return image.crop((left_shift, down_shift, self.width + left_shift, self.height + down_shift))

augmented_images = []

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