def test_get_distance_to_nearest_keypoint(self):
''' Shall create vector of distances '''
keyPoints1, descr1 = find_key_points(self.img1, nFeatures=self.nFeatures)
keyPoints2, descr2 = find_key_points(self.img2, nFeatures=self.nFeatures)
x1, y1, x2, y2 = get_match_coords(keyPoints1, descr1,
keyPoints2, descr2)
dist = get_distance_to_nearest_keypoint(x1, y1, self.img1.shape)
plt.imsave('sea_ice_drift_tests_%s.png' % inspect.currentframe().f_code.co_name,
dist)
self.assertEqual(dist.shape, self.img1.shape)
def test_get_displacement_pix(self):
''' Shall find matching coordinates and plot quiver in pixel/line'''
keyPoints1, descr1 = find_key_points(self.img1, nFeatures=self.nFeatures)
keyPoints2, descr2 = find_key_points(self.img2, nFeatures=self.nFeatures)
x1, y1, x2, y2 = get_match_coords(keyPoints1, descr1,
keyPoints2, descr2)
u, v = get_displacement_pix(self.n1, x1, y1, self.n2, x2, y2)
plt.quiver(x1, y1, u, v)
plt.savefig('sea_ice_drift_tests_%s.png' % inspect.currentframe().f_code.co_name)
plt.close('all')
self.assertEqual(len(u), len(x1))
def test_get_displacement_km(self):
''' Shall find matching coordinates and plot quiver in lon/lat'''
keyPoints1, descr1 = find_key_points(self.img1, nFeatures=self.nFeatures)
keyPoints2, descr2 = find_key_points(self.img2, nFeatures=self.nFeatures)
x1, y1, x2, y2 = get_match_coords(keyPoints1, descr1,
keyPoints2, descr2)
h = get_displacement_km(self.n1, x1, y1, self.n2, x2, y2)
plt.scatter(x1, y1, 30, h)
plt.colorbar()
plt.savefig('sea_ice_drift_tests_%s.png' % inspect.currentframe().f_code.co_name)
plt.close('all')
self.assertTrue(len(h) == len(x1))
def test_interpolation_near(self):
keyPoints1, descr1 = find_key_points(self.img1, nFeatures=self.nFeatures)
keyPoints2, descr2 = find_key_points(self.img2, nFeatures=self.nFeatures)
x1, y1, x2, y2 = get_match_coords(keyPoints1, descr1,
keyPoints2, descr2)
x2p1, y2p1 = interpolation_near(x1, y1, x2, y2, x1, y1)
plt.subplot(1,2,1)
plt.plot(x2, x2p1, '.')
plt.subplot(1,2,2)
plt.plot(y2, y2p1, '.')
plt.savefig('sea_ice_drift_tests_%s.png' % inspect.currentframe().f_code.co_name)
plt.close('all')
self.assertEqual(len(x2p1), len(x1))
def test_get_drift_vectors(self):
keyPoints1, descr1 = find_key_points(self.img1, nFeatures=self.nFeatures)
keyPoints2, descr2 = find_key_points(self.img2, nFeatures=self.nFeatures)
x1, y1, x2, y2 = get_match_coords(keyPoints1, descr1,
keyPoints2, descr2)
u, v, lon1, lat1, lon2, lat2 = get_drift_vectors(self.n1, x1, y1,
self.n2, x2, y2)
plt.plot(lon1, lat1, '.')
plt.plot(lon2, lat2, '.')
plt.quiver(lon1, lat1, u, v, angles='xy', scale_units='xy', scale=0.25)
plt.savefig('sea_ice_drift_tests_%s.png' % inspect.currentframe().f_code.co_name)
plt.close('all')
self.assertEqual(len(u), len(x1))
self.assertEqual(len(v), len(x1))
def setUp(self):
super(SeaIceDriftFTLibTests, self).setUp()
self.keyPoints1, self.descr1 = find_key_points(
self.img1, nFeatures=self.nFeatures)
self.keyPoints2, self.descr2 = find_key_points(
self.img2, nFeatures=self.nFeatures)