def crop(img, offset=(0, 0, 0), size=None):
"""
TODO(kisuk): Documentation.
"""
img = check_volume(img)
if size is None:
size = tuple(Vec3d(img.shape) - Vec3d(offset))
ret = np.zeros(size, dtype=img.dtype)
v1 = Vec3d(offset)
v2 = v1 + Vec3d(size)
ret[:] = img[v1[0]:v2[0], v1[1]:v2[1], v1[2]:v2[2]]
return ret
def testCreationAndAccess(self):
b = Box((1, 1, 1), [2, 2, 2])
self.assertTrue(b.min() == Vec3d(1, 1, 1))
self.assertTrue(b.max() == Vec3d(2, 2, 2))
self.assertTrue(b.size() == Vec3d(1, 1, 1))
b = Box((1, 0, 1), [0, 1, 0])
self.assertTrue(b.min() == Vec3d(0, 0, 0))
self.assertTrue(b.max() == Vec3d(1, 1, 1))
self.assertTrue(b.size() == Vec3d(1, 1, 1))
b1 = Box(b)
self.assertTrue(b1.min() == Vec3d(0, 0, 0))
self.assertTrue(b1.max() == Vec3d(1, 1, 1))
self.assertTrue(b1.size() == Vec3d(1, 1, 1))
def _random_location(self):
"""Return one of the valid locations randomly."""
s = self._range.size()
z = np.random.randint(0, s[0])
y = np.random.randint(0, s[1])
x = np.random.randint(0, s[2])
# Global coordinate system.
return Vec3d(z, y, x) + self._range.min()
def mirror_border(img, fov):
"""
TODO(kisuk) Documentation.
"""
img = check_volume(img)
# Validate FoV
fov = np.asarray(fov)
fov = Vec3d(fov.astype('uint32'))
# Pad size
top = fov / 2
btm = fov - top - (1, 1, 1)
pad_with = [(top[0], btm[0]), (top[1], btm[1]), (top[2], btm[2])]
# TODO(kisuk): Should we force an odd-sized fov?
# TODO(kisuk): 'symmetric' or 'reflect'?
return np.pad(img, pad_with, mode='reflect')
def max(self):
"""Return the max corner as a vector."""
return Vec3d(self._max)
def min(self):
"""Return the min corner as a vector."""
return Vec3d(self._min)
def contains(self, v):
"""Return true if a point is inside the box."""
(x, y, z) = Vec3d(v)
return (self._min.x <= x < self._max.x
and self._min.y <= y < self._max.y
and self._min.z <= z < self._max.z)
def size(self):
return Vec3d(self._size)
def __init__(self, v1_or_box, v2=None):
"""Initialize a box from another box or two vectors."""
if v2 == None:
self.set_coords(v1_or_box.min(), v1_or_box.max())
else:
self.set_coords(Vec3d(v1_or_box), Vec3d(v2))
def testExpand(self):
b1 = Box(Vec3d(1, 1, 1), [2, 2, 2])
b1.expand_by(1)
self.assertTrue(b1 == Box((0, 0, 0), (3, 3, 3)))
b1.expand_by((-1, 0, 0))
self.assertTrue(b1 == Box((1, 0, 0), (2, 3, 3)))
def testContains(self):
b = Box(Vec3d(1, 1, 1), [3, 3, 3])
self.assertTrue(b.contains(b.min()))
self.assertTrue(not b.contains(b.max()))
self.assertTrue(b.contains((2, 2, 2)))
self.assertTrue(not b.contains((-2, -2, -2)))
self.rot, self.shear, self.scale, self.stretch, self.twist)
sample[k] = np.transpose(v, (1,0,2,3))
return sample
if __name__ == "__main__":
# Fov.
spec = dict()
spec['input/p3'] = (5,109,109)
spec['input/p2'] = (7,73,73)
spec['input/p1'] = (9,45,45)
spec['label'] = (3,1,1,1)
# In/out size.
outsz = Vec3d(5,100,100)
for k, v in spec.iteritems():
newv = tuple(Vec3d(v[-3:]) + outsz - Vec3d(1,1,1))
spec[k] = v[:-3] + newv
# Augmentation.
aug = WarpAugment()
# Test.
ret = aug.prepare(spec, imgs=['input/p3','input/p2','input/p1'])
print ret
print aug.spec
print aug.rot
print aug.shear
print aug.scale
print aug.stretch
