mirror of https://github.com/JosephKJ/OWOD.git
72 lines
3.2 KiB
Python
72 lines
3.2 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
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import numpy as np
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import unittest
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from detectron2.data.transforms.transform import RotationTransform
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class TestRotationTransform(unittest.TestCase):
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def assertEqualsArrays(self, a1, a2):
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self.assertTrue(np.allclose(a1, a2))
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def randomData(self, h=5, w=5):
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image = np.random.rand(h, w)
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coords = np.array([[i, j] for j in range(h + 1) for i in range(w + 1)], dtype=float)
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return image, coords, h, w
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def test180(self):
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image, coords, h, w = self.randomData(6, 6)
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rot = RotationTransform(h, w, 180, expand=False, center=None)
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self.assertEqualsArrays(rot.apply_image(image), image[::-1, ::-1])
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rotated_coords = [[w - c[0], h - c[1]] for c in coords]
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self.assertEqualsArrays(rot.apply_coords(coords), rotated_coords)
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def test45_coords(self):
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_, coords, h, w = self.randomData(4, 6)
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rot = RotationTransform(h, w, 45, expand=False, center=None)
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rotated_coords = [
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[(x + y - (h + w) / 2) / np.sqrt(2) + w / 2, h / 2 + (y + (w - h) / 2 - x) / np.sqrt(2)]
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for (x, y) in coords
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]
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self.assertEqualsArrays(rot.apply_coords(coords), rotated_coords)
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def test90(self):
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image, coords, h, w = self.randomData()
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rot = RotationTransform(h, w, 90, expand=False, center=None)
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self.assertEqualsArrays(rot.apply_image(image), image.T[::-1])
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rotated_coords = [[c[1], w - c[0]] for c in coords]
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self.assertEqualsArrays(rot.apply_coords(coords), rotated_coords)
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def test90_expand(self): # non-square image
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image, coords, h, w = self.randomData(h=5, w=8)
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rot = RotationTransform(h, w, 90, expand=True, center=None)
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self.assertEqualsArrays(rot.apply_image(image), image.T[::-1])
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rotated_coords = [[c[1], w - c[0]] for c in coords]
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self.assertEqualsArrays(rot.apply_coords(coords), rotated_coords)
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def test_center_expand(self):
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# center has no effect if expand=True because it only affects shifting
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image, coords, h, w = self.randomData(h=5, w=8)
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angle = np.random.randint(360)
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rot1 = RotationTransform(h, w, angle, expand=True, center=None)
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rot2 = RotationTransform(h, w, angle, expand=True, center=(0, 0))
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rot3 = RotationTransform(h, w, angle, expand=True, center=(h, w))
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rot4 = RotationTransform(h, w, angle, expand=True, center=(2, 5))
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for r1 in [rot1, rot2, rot3, rot4]:
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for r2 in [rot1, rot2, rot3, rot4]:
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self.assertEqualsArrays(r1.apply_image(image), r2.apply_image(image))
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self.assertEqualsArrays(r1.apply_coords(coords), r2.apply_coords(coords))
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def test_inverse_transform(self):
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image, coords, h, w = self.randomData(h=5, w=8)
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rot = RotationTransform(h, w, 90, expand=True, center=None)
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rot_image = rot.apply_image(image)
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self.assertEqualsArrays(rot.inverse().apply_image(rot_image), image)
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rot = RotationTransform(h, w, 65, expand=True, center=None)
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rotated_coords = rot.apply_coords(coords)
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self.assertEqualsArrays(rot.inverse().apply_coords(rotated_coords), coords)
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if __name__ == "__main__":
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unittest.main()
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