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Modify cropping boundaries after rotation to preserve image ratio #258

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Modify cropping boundaries after rotation to preserve image ratio #258

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10 changes: 5 additions & 5 deletions Augmentor/Operations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -832,11 +832,11 @@ def do(image):
angle_b_sin = math.sin(angle_b_rad)

# Find the maximum area of the rectangle that could be cropped
E = (math.sin(angle_a_rad)) / (math.sin(angle_b_rad)) * \
(Y - X * (math.sin(angle_a_rad) / math.sin(angle_b_rad)))
E = E / 1 - (math.sin(angle_a_rad) ** 2 / math.sin(angle_b_rad) ** 2)
B = X - E
A = (math.sin(angle_a_rad) / math.sin(angle_b_rad)) * B
M = y / math.cos(angle_a_rad)
x_p = M / (math.tan(angle_a_rad) + y / x)
y_p = x_p * y / x
E = (X - x_p) / 2
A = (Y - y_p) / 2

# Crop this area from the rotated image
# image = image.crop((E, A, X - E, Y - A))
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