78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
|
import os
|
||
|
|
import numpy as np
|
||
|
|
from numpy.testing import assert_allclose, assert_raises, assert_
|
||
|
|
|
||
|
|
import pywt.data
|
||
|
|
|
||
|
|
data_dir = os.path.join(os.path.dirname(__file__), 'data')
|
||
|
|
wavelab_data_file = os.path.join(data_dir, 'wavelab_test_signals.npz')
|
||
|
|
wavelab_result_dict = np.load(wavelab_data_file)
|
||
|
|
|
||
|
|
|
||
|
|
def test_data_aero():
|
||
|
|
aero = pywt.data.aero()
|
||
|
|
|
||
|
|
ref = np.array([[178, 178, 179],
|
||
|
|
[170, 173, 171],
|
||
|
|
[185, 174, 171]])
|
||
|
|
|
||
|
|
assert_allclose(aero[:3, :3], ref)
|
||
|
|
|
||
|
|
|
||
|
|
def test_data_ascent():
|
||
|
|
ascent = pywt.data.ascent()
|
||
|
|
|
||
|
|
ref = np.array([[83, 83, 83],
|
||
|
|
[82, 82, 83],
|
||
|
|
[80, 81, 83]])
|
||
|
|
|
||
|
|
assert_allclose(ascent[:3, :3], ref)
|
||
|
|
|
||
|
|
|
||
|
|
def test_data_camera():
|
||
|
|
ascent = pywt.data.camera()
|
||
|
|
|
||
|
|
ref = np.array([[156, 157, 160],
|
||
|
|
[156, 157, 159],
|
||
|
|
[158, 157, 156]])
|
||
|
|
|
||
|
|
assert_allclose(ascent[:3, :3], ref)
|
||
|
|
|
||
|
|
|
||
|
|
def test_data_ecg():
|
||
|
|
ecg = pywt.data.ecg()
|
||
|
|
|
||
|
|
ref = np.array([-86, -87, -87])
|
||
|
|
|
||
|
|
assert_allclose(ecg[:3], ref)
|
||
|
|
|
||
|
|
|
||
|
|
def test_wavelab_signals():
|
||
|
|
"""Comparison with results generated using WaveLab"""
|
||
|
|
rtol = atol = 1e-12
|
||
|
|
|
||
|
|
# get a list of the available signals
|
||
|
|
available_signals = pywt.data.demo_signal('list')
|
||
|
|
assert_('Doppler' in available_signals)
|
||
|
|
|
||
|
|
for signal in available_signals:
|
||
|
|
# reference dictionary has lowercase names for the keys
|
||
|
|
key = signal.replace('-', '_').lower()
|
||
|
|
val = wavelab_result_dict[key]
|
||
|
|
if key in ['gabor', 'sineoneoverx']:
|
||
|
|
# these functions do not allow a size to be provided
|
||
|
|
assert_allclose(val, pywt.data.demo_signal(signal),
|
||
|
|
rtol=rtol, atol=atol)
|
||
|
|
assert_raises(ValueError, pywt.data.demo_signal, key, val.size)
|
||
|
|
else:
|
||
|
|
assert_allclose(val, pywt.data.demo_signal(signal, val.size),
|
||
|
|
rtol=rtol, atol=atol)
|
||
|
|
# these functions require a size to be provided
|
||
|
|
assert_raises(ValueError, pywt.data.demo_signal, key)
|
||
|
|
|
||
|
|
# ValueError on unrecognized signal type
|
||
|
|
assert_raises(ValueError, pywt.data.demo_signal, 'unknown_signal', 512)
|
||
|
|
|
||
|
|
# ValueError on invalid length
|
||
|
|
assert_raises(ValueError, pywt.data.demo_signal, 'Doppler', 0)
|