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test_refpixel.py
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test_refpixel.py
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# This Python module is part of the PyRate software package.
#
# Copyright 2020 Geoscience Australia
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
This Python module contains tests for the refpixel.py PyRate module.
"""
import os
import copy
import shutil
from subprocess import check_call, run
from pathlib import Path
import pytest
from numpy import nan, mean, std, isnan
import pyrate.configuration
import pyrate.core.refpixel
from pyrate.core import config as cf
from pyrate.core.refpixel import ref_pixel, _step, RefPixelError, ref_pixel_calc_wrapper
from pyrate.core import shared, ifgconstants as ifc
from pyrate import process, conv2tif, prepifg
from pyrate.configuration import Configuration
from tests.common import TEST_CONF_ROIPAC, TEST_CONF_GAMMA
from tests.common import small_data_setup, MockIfg, copy_small_ifg_file_list, \
copy_and_setup_small_data, manipulate_test_conf, assert_two_dirs_equal, PYTHON3P6
# TODO: figure out how editing resource.setrlimit fixes the error
# to fix the open to many files error
# https://stackoverflow.com/questions/18280612/ioerror-errno-24-too-many-open-files
# default testing values
REFNX = 5
REFNY = 7
MIN_FRAC = 0.7
CHIPSIZE = 3
PARALLEL = False
class TestReferencePixelInputTests:
'''
Verifies error checking capabilities of the reference pixel function
'''
@classmethod
def setup_method(cls):
cls.ifgs = small_data_setup()
cls.params = cf.get_config_params(TEST_CONF_ROIPAC)
cls.params[cf.REFNX] = REFNX
cls.params[cf.REFNY] = REFNY
cls.params[cf.REF_CHIP_SIZE] = CHIPSIZE
cls.params[cf.REF_MIN_FRAC] = MIN_FRAC
cls.params[cf.PARALLEL] = PARALLEL
def test_missing_chipsize(self):
self.params[cf.REF_CHIP_SIZE] = None
with pytest.raises(cf.ConfigException):
ref_pixel(self.ifgs, self.params)
def test_chipsize_valid(self):
for illegal in [0, -1, -15, 1, 2, self.ifgs[0].ncols+1, 4, 6, 10, 20]:
self.params[cf.REF_CHIP_SIZE] = illegal
with pytest.raises(RefPixelError):
ref_pixel(self.ifgs, self.params)
def test_minimum_fraction_missing(self):
self.params[cf.REF_MIN_FRAC] = None
with pytest.raises(cf.ConfigException):
ref_pixel(self.ifgs, self.params)
def test_minimum_fraction_threshold(self):
for illegal in [-0.1, 1.1, 1.000001, -0.0000001]:
self.params[cf.REF_MIN_FRAC] = illegal
with pytest.raises(RefPixelError):
ref_pixel(self.ifgs, self.params)
def test_search_windows(self):
# 45 is max # cells a width 3 sliding window can iterate over
for illegal in [-5, -1, 0, 46, 50, 100]:
self.params[cf.REFNX] = illegal
with pytest.raises(RefPixelError):
ref_pixel(self.ifgs, self.params)
# 40 is max # cells a width 3 sliding window can iterate over
for illegal in [-5, -1, 0, 71, 85, 100]:
self.params[cf.REFNY] = illegal
with pytest.raises(RefPixelError):
ref_pixel(self.ifgs, self.params)
def test_missing_search_windows(self):
self.params[cf.REFNX] = None
with pytest.raises(cf.ConfigException):
ref_pixel(self.ifgs, self.params)
self.params[cf.REFNX] = REFNX
self.params[cf.REFNY] = None
with pytest.raises(cf.ConfigException):
ref_pixel(self.ifgs, self.params)
class TestReferencePixelTests:
"""
Tests reference pixel search
"""
@classmethod
def setup_method(cls):
cls.params = cf.get_config_params(TEST_CONF_ROIPAC)
cls.params[cf.OUT_DIR], cls.ifgs = copy_and_setup_small_data()
cls.params[cf.REFNX] = REFNX
cls.params[cf.REFNY] = REFNY
cls.params[cf.REF_CHIP_SIZE] = CHIPSIZE
cls.params[cf.REF_MIN_FRAC] = MIN_FRAC
cls.params[cf.PARALLEL] = PARALLEL
def test_all_below_threshold_exception(self):
# test failure when no valid stacks in dataset
# rig mock data to be below threshold
mock_ifgs = [MockIfg(i, 6, 7) for i in self.ifgs]
for m in mock_ifgs:
m.phase_data[:1] = nan
m.phase_data[1:5] = 0.1
m.phase_data[5:] = nan
self.params[cf.REFNX] = 2
self.params[cf.REFNY] = 2
self.params[cf.REF_CHIP_SIZE] = CHIPSIZE
self.params[cf.REF_MIN_FRAC] = MIN_FRAC
self.params[cf.PARALLEL] = PARALLEL
with pytest.raises(ValueError):
ref_pixel(mock_ifgs, self.params)
def test_refnxy_step_1(self):
# test step of 1 for refnx|y gets the reference pixel for axis centre
mock_ifgs = [MockIfg(i, 47, 72) for i in self.ifgs]
for m in mock_ifgs:
m.phase_data[:1] = 0.2
m.phase_data[1:5] = 0.1
m.phase_data[5:] = 0.3
exp_refpx = (1, 1)
self.params[cf.REFNX] = 1
self.params[cf.REFNY] = 1
self.params[cf.REF_CHIP_SIZE] = CHIPSIZE
self.params[cf.REF_MIN_FRAC] = MIN_FRAC
self.params[cf.PARALLEL] = PARALLEL
res = ref_pixel(mock_ifgs, self.params)
assert exp_refpx == res
def test_large_window(self):
# 5x5 view over a 5x5 ifg with 1 window/ref pix search
chps = 5
mockifgs = [MockIfg(i, chps, chps) for i in self.ifgs]
self.params[cf.REFNX] = 1
self.params[cf.REFNY] = 1
self.params[cf.REF_CHIP_SIZE] = chps
self.params[cf.REF_MIN_FRAC] = MIN_FRAC
self.params[cf.PARALLEL] = PARALLEL
res = ref_pixel(mockifgs, self.params)
assert (2, 2) == res
def test_step(self):
# test different search windows to verify x/y step calculation
# convenience testing function
def assert_equal(actual, expected):
for a, e in zip(actual, expected):
assert a == e
# start with simple corner only test
width = 47
radius = 2
refnx = 2
exp = [2, 25, 44]
act = _step(width, refnx, radius)
assert_equal(act, exp)
# test with 3 windows
refnx = 3
exp = [2, 17, 32]
act = _step(width, refnx, radius)
assert_equal(act, exp)
# test 4 search windows
refnx = 4
exp = [2, 13, 24, 35]
act = _step(width, refnx, radius)
assert_equal(act, exp)
def test_ref_pixel(self):
exp_refpx = (2, 25)
self.params[cf.REFNX] = 2
self.params[cf.REFNY] = 2
self.params[cf.REF_CHIP_SIZE] = 5
self.params[cf.REF_MIN_FRAC] = MIN_FRAC
self.params[cf.PARALLEL] = PARALLEL
res = ref_pixel(self.ifgs, self.params)
assert res == exp_refpx
# Invalidate first data stack, get new refpix coods & retest
for i in self.ifgs:
i.phase_data[:30, :50] = nan
exp_refpx = (38, 2)
res = ref_pixel(self.ifgs, self.params)
assert res == exp_refpx
def _expected_ref_pixel(ifgs, cs):
"""Helper function for finding reference pixel when refnx/y=2"""
# calculate expected data
data = [i.phase_data for i in ifgs] # len 17 list of arrays
ul = [i[:cs, :cs] for i in data] # upper left corner stack
ur = [i[:cs, -cs:] for i in data]
ll = [i[-cs:, :cs] for i in data]
lr = [i[-cs:, -cs:] for i in data]
ulm = mean([std(i[~isnan(i)]) for i in ul]) # mean std of all the layers
urm = mean([std(i[~isnan(i)]) for i in ur])
llm = mean([std(i[~isnan(i)]) for i in ll])
lrm = mean([std(i[~isnan(i)]) for i in lr])
assert isnan([ulm, urm, llm, lrm]).any() is False
# coords of the smallest mean is the result
mn = [ulm, urm, llm, lrm]
class TestLegacyEqualityTest:
@classmethod
def setup_method(cls):
cls.params = cf.get_config_params(TEST_CONF_ROIPAC)
cls.params[cf.PARALLEL] = 0
cls.params[cf.OUT_DIR], cls.ifg_paths = copy_small_ifg_file_list()
conf_file = Path(cls.params[cf.OUT_DIR], 'conf_file.conf')
pyrate.configuration.write_config_file(params=cls.params, output_conf_file=conf_file)
cls.params = Configuration(conf_file).__dict__
cls.params_alt_ref_frac = copy.copy(cls.params)
cls.params_alt_ref_frac[cf.REF_MIN_FRAC] = 0.5
cls.params_all_2s = copy.copy(cls.params)
cls.params_all_2s[cf.REFNX] = 2
cls.params_all_2s[cf.REFNY] = 2
cls.params_chipsize_15 = copy.copy(cls.params_all_2s)
cls.params_chipsize_15[cf.REF_CHIP_SIZE] = 15
cls.params_all_1s = copy.copy(cls.params)
cls.params_all_1s[cf.REFNX] = 1
cls.params_all_1s[cf.REFNY] = 1
cls.params_all_1s[cf.REF_MIN_FRAC] = 0.7
for p, q in zip(cls.params[cf.INTERFEROGRAM_FILES], cls.ifg_paths): # hack
p.sampled_path = q
p.tmp_sampled_path = q
@classmethod
def teardown_method(cls):
shutil.rmtree(cls.params[cf.OUT_DIR])
def test_small_test_data_ref_pixel_lat_lon_provided(self):
self.params[cf.REFX], self.params[cf.REFY] = 150.941666654, -34.218333314
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params)
assert refx == 38
assert refy == 58
assert 0.8 == pytest.approx(self.params[cf.REF_MIN_FRAC])
def test_small_test_data_ref_pixel(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params)
assert refx == 38
assert refy == 58
assert 0.8 == pytest.approx(self.params[cf.REF_MIN_FRAC])
def test_small_test_data_ref_chipsize_15(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_chipsize_15)
assert refx == 7
assert refy == 7
assert 0.5 == pytest.approx(self.params_alt_ref_frac[cf.REF_MIN_FRAC])
def test_metadata(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_chipsize_15)
for i in self.ifg_paths:
ifg = shared.Ifg(i)
ifg.open(readonly=True)
md = ifg.meta_data
for k, v in zip([ifc.PYRATE_REFPIX_X, ifc.PYRATE_REFPIX_Y, ifc.PYRATE_REFPIX_LAT,
ifc.PYRATE_REFPIX_LON, ifc.PYRATE_MEAN_REF_AREA, ifc.PYRATE_STDDEV_REF_AREA],
[str(refx), str(refy), 0, 0, 0, 0]):
assert k in md # metadata present
# assert values
ifg.close()
def test_small_test_data_ref_all_1(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_all_1s)
assert 0.7 == pytest.approx(self.params_all_1s[cf.REF_MIN_FRAC])
assert 1 == self.params_all_1s[cf.REFNX]
assert 1 == self.params_all_1s[cf.REFNY]
assert refx == 2
assert refy == 2
class TestLegacyEqualityTestMultiprocessParallel:
@classmethod
def setup_method(cls):
cls.params = cf.get_config_params(TEST_CONF_ROIPAC)
cls.params[cf.PARALLEL] = 1
cls.params[cf.OUT_DIR], cls.ifg_paths = copy_small_ifg_file_list()
conf_file = Path(cls.params[cf.OUT_DIR], 'conf_file.conf')
pyrate.configuration.write_config_file(params=cls.params, output_conf_file=conf_file)
cls.params = Configuration(conf_file).__dict__
cls.params_alt_ref_frac = copy.copy(cls.params)
cls.params_alt_ref_frac[cf.REF_MIN_FRAC] = 0.5
cls.params_all_2s = copy.copy(cls.params)
cls.params_all_2s[cf.REFNX] = 2
cls.params_all_2s[cf.REFNY] = 2
cls.params_chipsize_15 = copy.copy(cls.params_all_2s)
cls.params_chipsize_15[cf.REF_CHIP_SIZE] = 15
cls.params_all_1s = copy.copy(cls.params)
cls.params_all_1s[cf.REFNX] = 1
cls.params_all_1s[cf.REFNY] = 1
cls.params_all_1s[cf.REF_MIN_FRAC] = 0.7
for p, q in zip(cls.params[cf.INTERFEROGRAM_FILES], cls.ifg_paths): # hack
p.sampled_path = q
p.tmp_sampled_path = q
@classmethod
def teardown_method(cls):
shutil.rmtree(cls.params[cf.OUT_DIR])
def test_small_test_data_ref_pixel(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params)
assert refx == 38
assert refy == 58
assert 0.8 == pytest.approx(self.params[cf.REF_MIN_FRAC])
def test_more_small_test_data_ref_pixel(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_alt_ref_frac)
assert refx == 38
assert refy == 58
assert 0.5 == pytest.approx(self.params_alt_ref_frac[cf.REF_MIN_FRAC])
def test_small_test_data_ref_pixel_all_2(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_all_2s)
assert refx == 25
assert refy == 2
assert 0.5 == pytest.approx(self.params_alt_ref_frac[cf.REF_MIN_FRAC])
def test_small_test_data_ref_chipsize_15(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_chipsize_15)
assert refx == 7
assert refy == 7
assert 0.5 == pytest.approx(self.params_alt_ref_frac[cf.REF_MIN_FRAC])
def test_small_test_data_ref_all_1(self):
refx, refy = pyrate.core.refpixel.ref_pixel_calc_wrapper(self.params_all_1s)
assert 0.7 == pytest.approx(self.params_all_1s[cf.REF_MIN_FRAC])
assert 1 == self.params_all_1s[cf.REFNX]
assert 1 == self.params_all_1s[cf.REFNY]
assert refx == 2
assert refy == 2
@pytest.mark.slow
@pytest.mark.skipif(PYTHON3P6, reason='Skipped in python3p6')
def test_error_msg_refpixel_out_of_bounds(tempdir, gamma_conf):
"check correct latitude/longitude refpixel error is raised when specified refpixel is out of bounds"
for x, (refx, refy) in zip(['longitude', 'latitude', 'longitude and latitude'],
[(150., -34.218333314), (150.941666654, -34.), (150, -34)]):
_, out = _get_mlooked_files(gamma_conf, Path(tempdir()), refx=refx, refy=refy)
msg = "Supplied {} value is outside the bounds of the interferogram data"
assert msg.format(x) in out.stderr
@pytest.mark.slow
@pytest.mark.skipif(PYTHON3P6, reason='Skipped in python3p6')
def test_gamma_ref_pixel_search_vs_lat_lon(tempdir, gamma_conf):
params_1, _ = _get_mlooked_files(gamma_conf, Path(tempdir()), refx=-1, refy=-1)
params_2, _ = _get_mlooked_files(gamma_conf, Path(tempdir()), refx=150.941666654, refy=-34.218333314)
assert_two_dirs_equal(params_1[cf.OUT_DIR], params_2[cf.OUT_DIR], f"*{params_1[cf.IFG_CROP_OPT]}cr.tif", 18)
def _get_mlooked_files(gamma_conf, tdir, refx, refy):
params = manipulate_test_conf(gamma_conf, tdir)
params[cf.REFX] = refx
params[cf.REFY] = refy
output_conf_file = 'config.conf'
output_conf = tdir.joinpath(output_conf_file)
pyrate.configuration.write_config_file(params=params, output_conf_file=output_conf)
params = Configuration(output_conf).__dict__
conv2tif.main(params)
params = Configuration(output_conf).__dict__
prepifg.main(params)
stdout = run(f"pyrate process -f {output_conf}", shell=True, capture_output=True, text=True)
return params, stdout
class TestRefPixelReuseLoadsSameFileAndPixels:
@classmethod
def setup_method(cls):
cls.conf = TEST_CONF_GAMMA
params = Configuration(cls.conf).__dict__
conv2tif.main(params)
params = Configuration(cls.conf).__dict__
prepifg.main(params)
params = Configuration(cls.conf).__dict__
process._copy_mlooked(params)
cls.params = params
@classmethod
def teardown_method(cls):
shutil.rmtree(cls.params[cf.OUT_DIR])
@pytest.mark.slow()
def test_ref_pixel_multiple_runs_reuse_from_disc(self, ref_pixel):
params = self.params
params[cf.REFX], params[cf.REFY] = ref_pixel
params[cf.REF_PIXEL_FILE] = Configuration.ref_pixel_path(params)
ref_pixel_calc_wrapper(params)
ref_pixel_file = self.params[cf.REF_PIXEL_FILE]
time_written = os.stat(ref_pixel_file).st_mtime
assert self.params[cf.REFX_FOUND] == 38
assert self.params[cf.REFY_FOUND] == 58
# run again
ref_pixel_calc_wrapper(self.params)
ref_pixel_file = self.params[cf.REF_PIXEL_FILE]
time_written_1 = os.stat(ref_pixel_file).st_mtime
assert self.params[cf.REFX_FOUND] == 38
assert self.params[cf.REFY_FOUND] == 58
# run a third time
ref_pixel_calc_wrapper(self.params)
ref_pixel_file = self.params[cf.REF_PIXEL_FILE]
time_written_2 = os.stat(ref_pixel_file).st_mtime
assert time_written == time_written_2 == time_written_1
assert self.params[cf.REFX], self.params[cf.REFY] == ref_pixel
assert self.params[cf.REFX_FOUND] == 38
assert self.params[cf.REFY_FOUND] == 58