def test_rca(self):
self.assertEqual(str(metric_learn.RCA()),
"RCA(num_dims=None, pca_comps=None, preprocessor=None)")
self.assertEqual(str(metric_learn.RCA_Supervised()),
"RCA_Supervised(chunk_size=2, num_chunks=100, "
"num_dims=None, pca_comps=None,\n "
"preprocessor=None)")
def test_rca(self):
self.assertEqual(
remove_spaces(str(metric_learn.RCA())),
remove_spaces("RCA(n_components=None, "
"num_dims='deprecated', "
"pca_comps='deprecated', "
"preprocessor=None)"))
self.assertEqual(
remove_spaces(str(metric_learn.RCA_Supervised())),
remove_spaces("RCA_Supervised(chunk_size=2, "
"n_components=None, num_chunks=100, "
"num_dims='deprecated', pca_comps='deprecated', "
"preprocessor=None, random_state=None)"))
def test_rca(self):
def_kwargs = {'n_components': None, 'preprocessor': None}
nndef_kwargs = {'n_components': 3}
merged_kwargs = sk_repr_kwargs(def_kwargs, nndef_kwargs)
self.assertEqual(remove_spaces(str(metric_learn.RCA(n_components=3))),
remove_spaces(f"RCA({merged_kwargs})"))
def_kwargs = {'chunk_size': 2, 'n_components': None, 'num_chunks': 100,
'preprocessor': None, 'random_state': None}
nndef_kwargs = {'num_chunks': 5}
merged_kwargs = sk_repr_kwargs(def_kwargs, nndef_kwargs)
self.assertEqual(
remove_spaces(str(metric_learn.RCA_Supervised(num_chunks=5))),
remove_spaces(f"RCA_Supervised({merged_kwargs})"))
def test_string_repr(self):
# we don't test LMNN here because it could be python_LMNN
self.assertEqual(str(metric_learn.Covariance()), "Covariance()")
self.assertEqual(str(metric_learn.NCA()),
"NCA(learning_rate=0.01, max_iter=100, num_dims=None)")
self.assertEqual(str(metric_learn.LFDA()),
"LFDA(dim=None, k=7, metric='weighted')")
self.assertEqual(str(metric_learn.ITML()), """
ITML(convergence_threshold=0.001, gamma=1.0, max_iters=1000, verbose=False)
""".strip('\n'))
self.assertEqual(str(metric_learn.ITML_Supervised()), """
ITML_Supervised(A0=None, bounds=None, convergence_threshold=0.001, gamma=1.0,
max_iters=1000, num_constraints=None, num_labeled=inf,
verbose=False)
""".strip('\n'))
self.assertEqual(str(metric_learn.LSML()),
"LSML(max_iter=1000, tol=0.001, verbose=False)")
self.assertEqual(str(metric_learn.LSML_Supervised()), """
LSML_Supervised(max_iter=1000, num_constraints=None, num_labeled=inf,
prior=None, tol=0.001, verbose=False, weights=None)
""".strip('\n'))
self.assertEqual(str(metric_learn.SDML()), """
SDML(balance_param=0.5, sparsity_param=0.01, use_cov=True, verbose=False)
""".strip('\n'))
self.assertEqual(str(metric_learn.SDML_Supervised()), """
SDML_Supervised(balance_param=0.5, num_constraints=None, num_labeled=inf,
sparsity_param=0.01, use_cov=True, verbose=False)
""".strip('\n'))
self.assertEqual(str(metric_learn.RCA()), "RCA(dim=None)")
self.assertEqual(str(metric_learn.RCA_Supervised()),
"RCA_Supervised(chunk_size=2, dim=None, num_chunks=100)")
self.assertEqual(str(metric_learn.MLKR()), """
MLKR(A0=None, alpha=0.0001, epsilon=0.01, max_iter=1000, num_dims=None)
""".strip('\n'))
def analyse_KNN_RCA_NCA(k=10):
"""
Analyse and collect all the different results
with respect to different kNNs tests
Parameters
----------
k: int
How many neighbeours should we consider
Returns
-------
results: list of lists
Measured results which are going to be later analysed
true_labels: list
True test labels
"""
all_data = load_data(False)
training_data = all_data[0]
training_labels = training_data[1]
training_features = training_data[0]
training_camIds = training_data[2]
query_data = all_data[1]
gallery_data = all_data[2]
query_labels = query_data[1]
gallery_labels = gallery_data[1]
query_features = query_data[0]
gallery_features = gallery_data[0]
query_camIds = query_data[2]
gallery_camIds = gallery_data[2]
errors = [0] * k
labels = [None] * k
tops = [0] * k
query_features = normalize(query_features, axis=1)
training_features = normalize(training_features, axis=1)
gallery_features = normalize(gallery_features, axis=1)
rca = metric_learn.RCA(pca_comps=250)
rca.fit(training_features, training_labels)
query_features = rca.transform(query_features)
training_features = rca.transform(training_features)
gallery_features = rca.transform(gallery_features)
S = NCA(max_iter=10, tol=None, verbose=True)
training_features = S.fit_transform(training_features, training_labels)
query_features = S.transform(query_features)
gallery_features = S.transform(gallery_features)
for i in tqdm(range(len(query_features))):
query = query_features[i, :]
query_label = query_labels[i]
query_camId = query_camIds[i]
selected_gallery_features, selected_gallery_labels = select_features(
gallery_camIds, query_camId, gallery_labels, query_label,
gallery_features)
clf = neighbors.KNeighborsClassifier(k, metric="euclidean")
clf.fit(selected_gallery_features, selected_gallery_labels)
distances, predicted_neighbors = clf.kneighbors(query.reshape(1, -1),
return_distance=True)
predicted_labels = np.array([
selected_gallery_labels[l] for l in predicted_neighbors
]).flatten()
weighted_distances = weight(distances).flatten()
for j in range(len(predicted_labels)):
rank = predicted_labels[:j + 1]
rank_weights = weighted_distances[:j + 1]
label = vote(rank, rank_weights)
if labels[j] is None:
labels[j] = [label]
else:
labels[j].append(label)
if query_label not in rank:
tops[j] += 1
if label != query_label:
errors[j] += 1
for i in range(len(errors)):
errors[i] /= len(query_features)
tops[i] /= len(query_features)
return labels, errors, tops, query_labels
def rca(self, train_X, train_y, test_X, dims):
learner = ml.RCA(num_dims=dims)
train_X = learner.fit_transform(train_X, train_y)
test_X = learner.transform(test_X)
return train_X, test_X
def test_rca(self):
self.assertEqual(remove_spaces(str(metric_learn.RCA(n_components=3))),
remove_spaces("RCA(n_components=3)"))
self.assertEqual(
remove_spaces(str(metric_learn.RCA_Supervised(num_chunks=5))),
remove_spaces("RCA_Supervised(num_chunks=5)"))
