def test_image_list():
img = load_image(funcfile)
exp_shape = (17, 21, 3, 20)
imglst = ImageList.from_image(img, axis=-1)
# Test empty ImageList
emplst = ImageList()
yield assert_equal(len(emplst.list), 0)
# Test non-image construction
a = np.arange(10)
yield assert_raises(ValueError, ImageList, a)
yield assert_raises(ValueError, ImageList.from_image, img, None)
# check all the axes
for i in range(4):
order = range(4)
order.remove(i)
order.insert(0,i)
img_re_i = img.reordered_reference(order).reordered_axes(order)
imglst_i = ImageList.from_image(img, axis=i)
yield assert_equal(imglst_i.list[0].shape, img_re_i.shape[1:])
# check the affine as well
yield assert_almost_equal(imglst_i.list[0].affine,
img_re_i.affine[1:,1:])
yield assert_equal(img.shape, exp_shape)
# length of image list should match number of frames
yield assert_equal(len(imglst.list), img.shape[3])
# check the affine
A = np.identity(4)
A[:3,:3] = img.affine[:3,:3]
A[:3,-1] = img.affine[:3,-1]
yield assert_almost_equal(imglst.list[0].affine, A)
# Slicing an ImageList should return an ImageList
sublist = imglst[2:5]
yield assert_true(isinstance(sublist, ImageList))
# Except when we're indexing one element
yield assert_true(isinstance(imglst[0], Image))
# Verify array interface
# test __array__
yield assert_true(isinstance(np.asarray(sublist), np.ndarray))
# Test __setitem__
sublist[2] = sublist[0]
yield assert_equal(np.asarray(sublist[0]).mean(),
np.asarray(sublist[2]).mean())
# Test iterator
for x in sublist:
yield assert_true(isinstance(x, Image))
yield assert_equal(x.shape, exp_shape[:3])
def test_image_list():
img = load_image(funcfile)
func_shape = img.shape
imglst = ImageList.from_image(img)
# Test empty ImageList
emplst = ImageList()
yield assert_equal, len(emplst.list), 0
# Test non-image construction
a = np.arange(10)
yield assert_raises, ValueError, ImageList, a
yield assert_raises, ValueError, ImageList.from_image, img, None
# length of image list should match number of frames
yield assert_equal, len(imglst.list), img.shape[3]
# Slicing an ImageList should return an ImageList
sublist = imglst[2:5]
yield assert_true, isinstance(sublist, ImageList)
# Except when we're indexing one element
yield assert_true, isinstance(imglst[0], Image)
# Verify array interface
# test __array__
yield assert_true, isinstance(np.asarray(sublist), np.ndarray)
# Test __setitem__
sublist[2] = sublist[0]
yield assert_equal, np.asarray(sublist[0]).mean(), \
np.asarray(sublist[2]).mean()
# Test iterator
for x in sublist:
yield assert_true, isinstance(x, Image)
yield assert_equal, x.shape, func_shape[:3]
