test/test_tomopy/test_misc/test_morph.py
#!/usr/bin/env python
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from __future__ import (absolute_import, division, print_function,
unicode_literals)
import unittest
from ..util import read_file, loop_dim
from tomopy.misc.morph import downsample, upsample, sino_360_to_180
import numpy as np
from numpy.testing import assert_array_almost_equal
__author__ = "Doga Gursoy"
__copyright__ = "Copyright (c) 2015, UChicago Argonne, LLC."
__docformat__ = 'restructuredtext en'
class MorphingTestCase(unittest.TestCase):
def test_downsample(self):
loop_dim(downsample, read_file('obj.npy'))
def test_upsample(self):
loop_dim(upsample, read_file('obj.npy'))
def test_sino_360_to_180(self):
ltest_im = np.random.random((32, 32, 128)).astype(np.float32)
ltest_im[16:, :, :32 ] = ltest_im[:16, :, :32][:,:,::-1]
ltest = sino_360_to_180(ltest_im, 32, 'left')
rtest_im = np.random.random((32, 32, 128)).astype(np.float32)
rtest_im[16:, :, -32:] = rtest_im[:16, :, -32:][:,:,::-1]
rtest = sino_360_to_180(rtest_im, 32, 'right')
assert_array_almost_equal(
ltest[:, :, -128:], ltest_im[:16, :, :])
assert_array_almost_equal(
ltest[:, :, :128], ltest_im[16:, :, :][:, :, ::-1])
assert_array_almost_equal(
rtest[:, :, :128], rtest_im[:16, :, :])
assert_array_almost_equal(
rtest[:, :, -128:], rtest_im[16:, :, :][:, :, ::-1])