def itml_cmc(features, train_idxs, query_idxs, camId, gallery_idxs, labels):
N, m = features[train_idxs].shape
# features[train_idxs][:1000, ].shape
eigvals, eigvecs = calc_eig_pca_small(features[train_idxs].T, m, N)
m = 50
m_eigvecs = eigvecs[:, :m]
avg_face = compute_avg_face(features[train_idxs].T)
phi = features - avg_face
m_features = np.dot(phi, m_eigvecs)
itml = ITML_Supervised(verbose=True, num_constraints=5000, gamma=0.2)
X = m_features[train_idxs]
Y = labels[train_idxs]
X_itml = itml.fit_transform(X, Y)
M = itml.metric()
nn_idx_mat = evaluation(
knn,
features=m_features,
gallery_idxs=gallery_idxs,
query_idxs=query_idxs,
camId=camId,
labels=labels,
metric='mahalanobis',
metric_params={'VI': M}
)
return plot_CMC(nn_idx_mat, query_idxs, labels)
def test_itml_supervised(self):
seed = np.random.RandomState(1234)
itml = ITML_Supervised(n_constraints=200, random_state=seed)
itml.fit(self.X, self.y)
res_1 = itml.transform(self.X)
seed = np.random.RandomState(1234)
itml = ITML_Supervised(n_constraints=200, random_state=seed)
res_2 = itml.fit_transform(self.X, self.y)
assert_array_almost_equal(res_1, res_2)
def test_itml_supervised(self):
seed = np.random.RandomState(1234)
itml = ITML_Supervised(num_constraints=200)
itml.fit(self.X, self.y, random_state=seed)
res_1 = itml.transform(self.X)
seed = np.random.RandomState(1234)
itml = ITML_Supervised(num_constraints=200)
res_2 = itml.fit_transform(self.X, self.y, random_state=seed)
assert_array_almost_equal(res_1, res_2)
def main():
print("importing data...")
data = loadmat('assets/cuhk03_new_protocol_config_labeled.mat')
with open('assets/feature_data.json') as f:
features = ujson.load(f)
print("data imported")
features = np.array(features)
train_idxs = data['train_idx'].flatten() - 1
query_idxs = data['query_idx'].flatten() - 1
camId = data['camId'].flatten()
gallery_idxs = data['gallery_idx'].flatten() - 1
labels = data['labels'].flatten()
N, m = features[train_idxs].shape
# features[train_idxs][:1000, ].shape
eigvals, eigvecs = calc_eig_pca_small(features[train_idxs].T, m, N)
m = 50
m_eigvecs = eigvecs[:, :m]
avg_face = compute_avg_face(features[train_idxs].T)
phi = features - avg_face
m_features = np.dot(phi, m_eigvecs)
itml = ITML_Supervised(verbose=True, num_constraints=5000, gamma=0.1)
X = m_features[train_idxs]
Y = labels[train_idxs]
X_itml = itml.fit_transform(X, Y)
M = itml.metric()
plot_3d(X_itml, Y)
nn_idx_mat = evaluation(knn,
features=m_features,
gallery_idxs=gallery_idxs,
query_idxs=query_idxs,
camId=camId,
labels=labels,
metric='mahalanobis',
metric_params={'VI': M})
acc = get_all_rank_acc(nn_idx_mat, query_idxs, labels)
print("Accuracy:")
print(acc)
test_set_idxs = np.append(gallery_idxs, query_idxs)
features_ITML = itml.transform(m_features)
X_test = features_ITML[test_set_idxs]
Y_test = labels[test_set_idxs]
n_cluster = np.unique(Y_test).size
nmi_kmean, acc_kmean = evaluation_k_means(X_test, n_cluster, Y_test)
print("ITML k-means accuracy (test set):")
print(acc_kmean)
gamma = [i / 10 for i in range(1, 11)]
X_itmls = []
all_rank_acc_g = []
for g in gamma:
itml = ITML_Supervised(verbose=True, num_constraints=5000, gamma=0.2)
X = m_features[train_idxs]
X_itml = itml.fit_transform(X, Y)
X_itmls.append(X_itml)
M = itml.metric()
nn_idx_mat = evaluation(knn,
features=m_features,
gallery_idxs=gallery_idxs,
query_idxs=query_idxs,
camId=camId,
labels=labels,
metric='mahalanobis',
metric_params={'VI': M})
acc_g = get_all_rank_acc(nn_idx_mat, query_idxs, labels)
all_rank_acc_g.append(acc_g)
plt.plot(gamma, all_rank_acc_g)
plt.legend(('Rank 1', 'Rank 5', 'Rank10'))
plt.ylabel('Accuracy')
plt.xlabel('gamma')
print(all_rank_acc_g)
plt.show()