def main(base_name, traj_len=None, cluster_size=10):
"""
Function to read IDT features, form BOW based model after clustering and evaluate
on 3/5 cluster analysis of highlights dataset.
The videos can be visualized by writing trimmed class videos into their respective
classes.
Parameters:
------
base_name: path to the wts, losses, predictions and log files
"""
seed = 1234
np.random.seed(seed)
print(60 * "#")
#####################################################################
# Divide the sample files into training set, validation and test sets
train_lst, val_lst, test_lst = utils.split_dataset_files(DATASET)
# form the names of the list of label files, should be at destination
train_lab = [f + ".json" for f in train_lst]
val_lab = [f + ".json" for f in val_lst]
test_lab = [f + ".json" for f in test_lst]
# get complete path lists of label files
tr_labs = [os.path.join(LABELS, f) for f in train_lab]
val_labs = [os.path.join(LABELS, f) for f in val_lab]
#####################################################################
sizes = [
utils.getNFrames(os.path.join(DATASET, f + ".avi")) for f in train_lst
]
val_sizes = [
utils.getNFrames(os.path.join(DATASET, f + ".avi")) for f in val_lst
]
###########################################################################
print("No. of training videos : {}".format(len(train_lst)))
print("Size : {}".format(sizes))
# hlDataset = VideoDataset(tr_labs, sizes, seq_size=SEQ_SIZE, is_train_set = True)
#####################################################################
# Feature Extraction : (IDT)
# Get feats for only the training videos. Get ordered histograms of freq
print("Trajectory Length : {}, nClusters : {} ".format(
traj_len, cluster_size))
#####################################################################
# read into dictionary {vidname: np array, ...}
print("Loading features from disk...")
# get Nx4096 numpy matrix with columns as features and rows as window placement features
if not os.path.exists(base_name):
os.makedirs(base_name)
# # Read IDT features {with trajectory length = traj_len}
features, strokes_name_id = read_partition_feats(
DATASET, LABELS, IDT_FEATS + "_TrajLen" + str(traj_len), train_lst,
traj_len)
with open(
os.path.join(base_name,
"idt_feats_traj" + str(traj_len) + ".pkl"),
"wb") as fp:
pickle.dump(features, fp)
with open(
os.path.join(base_name,
"idt_snames_traj" + str(traj_len) + ".pkl"),
"wb") as fp:
pickle.dump(strokes_name_id, fp)
with open(
os.path.join(base_name, "idt_feats_traj" + str(traj_len) + ".pkl"),
"rb") as fp:
features = pickle.load(fp)
with open(
os.path.join(base_name,
"idt_snames_traj" + str(traj_len) + ".pkl"),
"rb") as fp:
strokes_name_id = pickle.load(fp)
#####################################################################
# get small sample of the IDT features and form a matrix (N, vec_size)
vecs = []
for key in sorted(list(features.keys())):
vecs.append(features[key])
vecs = np.vstack(vecs)
vecs[np.isnan(vecs)] = 0
vecs[np.isinf(vecs)] = 0
# sample points for clustering
if vecs.shape[0] > MAX_SAMPLES:
vecs = vecs[
np.random.choice(vecs.shape[0], MAX_SAMPLES, replace=False), :]
#fc7 layer output size (4096)
INP_VEC_SIZE = vecs.shape[-1]
print("INP_VEC_SIZE = ", INP_VEC_SIZE)
km_filepath = os.path.join(base_name, km_filename)
# # Uncomment only while training.
if not os.path.isfile(km_filepath + "_C" + str(cluster_size) + ".pkl"):
km_model = make_codebook(vecs, cluster_size) #, model_type='gmm')
## # Save to disk, if training is performed
print("Writing the KMeans models to disk...")
pickle.dump(
km_model,
open(km_filepath + "_C" + str(cluster_size) + ".pkl", "wb"))
else:
# Load from disk, for validation and test sets.
km_model = pickle.load(
open(km_filepath + "_C" + str(cluster_size) + ".pkl", 'rb'))
###########################################################################
# Form the training dataset for supervised classification
# Assign the words (flow frames) to their closest cluster centres and count the
# frequency for each document(video). Create IDF bow dataframe by weighting
# df_train is (nVids, 50) for magnitude, with index as videonames
print("Create a dataframe for HOOF features...")
df_train, words_train = create_bovw_df(features, strokes_name_id, km_model,\
base_name, "train")
# read the stroke annotation labels from text file.
vids_list = list(df_train.index)
labs_keys, labs_values = get_cluster_labels(ANNOTATION_FILE)
if min(labs_values) == 1:
labs_values = [l - 1 for l in labs_values]
labs_keys = [k.replace('.avi', '') for k in labs_keys]
train_labels = np.array(
[labs_values[labs_keys.index(v)] for v in vids_list])
###########################################################################
# apply_clustering(df_train, DATASET, LABELS, ANNOTATION_FILE, base_name)
###########################################################################
###########################################################################
# Train SVM
clf = LinearSVC(verbose=False, random_state=124, max_iter=3000)
clf.fit(df_train, train_labels)
print("Training Complete.")
###########################################################################
# # Train a classifier on the features.
##################################################################################
# Evaluation on validation set
print("Validation phase ....")
if not os.path.isfile(
os.path.join(base_name,
"idt_feats_val_traj" + str(traj_len) + ".pkl")):
features_val, strokes_name_id_val = read_partition_feats(DATASET, LABELS, \
IDT_FEATS+"_TrajLen"+str(traj_len),
val_lst, traj_len)
with open(
os.path.join(base_name,
"idt_feats_val_traj" + str(traj_len) + ".pkl"),
"wb") as fp:
pickle.dump(features_val, fp)
with open(
os.path.join(base_name,
"idt_snames_val_traj" + str(traj_len) + ".pkl"),
"wb") as fp:
pickle.dump(strokes_name_id_val, fp)
else:
with open(
os.path.join(base_name,
"idt_feats_val_traj" + str(traj_len) + ".pkl"),
"rb") as fp:
features_val = pickle.load(fp)
with open(
os.path.join(base_name,
"idt_snames_val_traj" + str(traj_len) + ".pkl"),
"rb") as fp:
strokes_name_id_val = pickle.load(fp)
print("Create dataframe BOVW validation set...")
df_val_hoof, words_val = create_bovw_df(features_val, strokes_name_id_val, \
km_model, base_name, "val")
vids_list_val = list(df_val_hoof.index)
val_labels = np.array(
[labs_values[labs_keys.index(v)] for v in vids_list_val])
# labs_df = pd.DataFrame(labels, index=vids_list, columns=['label'])
print("Evaluating on the validation set...")
# evaluate(model_mag, df_test_mag, labs_df)
# Find maximum permutation accuracy using predicted_label_val and label_val
# acc_values, perm_tuples, gt_list, pred_list = calculate_accuracy(val_labels, \
# predicted_label_val)
# acc_perc = [sum(k)/len(predicted_label_val) for k in acc_values]
#
# best_indx = acc_perc.index(max(acc_perc))
# print("Max Acc. : ", max(acc_perc))
# print("Acc values : ", acc_perc)
# print("Acc values : ", acc_values)
# print("perm_tuples : ", perm_tuples)
###########################################################################
# Evaluate the BOW classifier (SVM)
confusion_mat = np.zeros((NUM_TOPICS, NUM_TOPICS))
pred = clf.predict(df_val_hoof)
correct = 0
for i, true_val in enumerate(val_labels):
if pred[i] == true_val:
correct += 1
confusion_mat[pred[i], true_val] += 1
print('#' * 30)
print("BOW Classification Results:")
print("%d/%d Correct" % (correct, len(pred)))
print("Accuracy = {} ".format(float(correct) / len(pred)))
print("Confusion matrix")
print(confusion_mat)
return (float(correct) / len(pred))
def main(base_name, nbins=10, ft_type='2dcnn', cluster_size=10):
"""
Function to extract orientation features and find the directions of strokes,
using LDA model/clustering and evaluate on three cluster analysis on highlights.
The videos can be visualized by writing trimmed class videos into their respective
classes.
Parameters:
------
base_name: path to the wts, losses, predictions and log files
use_gpu: True if training to be done on GPU, False for CPU
"""
seed = 1234
print(60 * "#")
#####################################################################
# Form dataloaders
# train_lst_main_ext = get_main_dataset_files(MAIN_DATASET) #with extensions
# train_lst_main = [t.rsplit('.', 1)[0] for t in train_lst_main_ext] # remove the extension
# val_lst_main_ext = get_main_dataset_files(VAL_DATASET)
# val_lst_main = [t.rsplit('.', 1)[0] for t in val_lst_main_ext]
# Divide the samples files into training set, validation and test sets
train_lst, val_lst, test_lst = utils.split_dataset_files(DATASET)
#print("c3dWinSize : {}".format(c3dWinSize))
# form the names of the list of label files, should be at destination
train_lab = [f + ".json" for f in train_lst]
val_lab = [f + ".json" for f in val_lst]
test_lab = [f + ".json" for f in test_lst]
# train_lab_main = [f+".json" for f in train_lst_main]
# val_lab_main = [f+".json" for f in val_lst_main]
# get complete path lists of label files
tr_labs = [os.path.join(LABELS, f) for f in train_lab]
val_labs = [os.path.join(LABELS, f) for f in val_lab]
# tr_labs_main = [os.path.join(MAIN_LABELS, f) for f in train_lab_main]
# val_labs_main = [os.path.join(VAL_LABELS, f) for f in val_lab_main]
#####################################################################
sizes = [
utils.getNFrames(os.path.join(DATASET, f + ".avi")) for f in train_lst
]
val_sizes = [
utils.getNFrames(os.path.join(DATASET, f + ".avi")) for f in val_lst
]
# sizes_main = [utils.getNFrames(os.path.join(MAIN_DATASET, f)) for f in train_lst_main_ext]
# val_sizes_main = [utils.getNFrames(os.path.join(VAL_DATASET, f)) for f in val_lst_main_ext]
###########################################################################
# Merge the training highlights and main dataset variables
# train_lab.extend(train_lab_main)
# tr_labs.extend(tr_labs_main)
# sizes.extend(sizes_main)
print("No. of training videos : {}".format(len(train_lst)))
print("Size : {}".format(sizes))
# hlDataset = VideoDataset(tr_labs, sizes, seq_size=SEQ_SIZE, is_train_set = True)
# print(hlDataset.__len__())
#####################################################################
# Feature Extraction : (GRID OF / HOOF / 2D CNN / 3DCNN / IDT)
print("Feature Type : {} :: nClusters : {} ".format(ft_type, cluster_size))
#####################################################################
# read into dictionary {vidname: np array, ...}
BATCH_SIZE, SEQ_SIZE, STEP = 16, 16, 1
print("Loading features from disk...")
if not os.path.exists(base_name):
os.makedirs(base_name)
features, strokes_name_id = extract_feats(DATASET,
LABELS,
CLASS_IDS,
BATCH_SIZE,
SEQ_SIZE,
STEP,
extractor=ft_type,
model_path=model_path,
nclasses=NUM_TOPICS,
part='train')
with open(os.path.join(base_name, ft_type + "_feats_train.pkl"),
"wb") as fp:
pickle.dump(features, fp)
with open(os.path.join(base_name, ft_type + "_snames_train.pkl"),
"wb") as fp:
pickle.dump(strokes_name_id, fp)
with open(os.path.join(base_name, ft_type + "_feats_train.pkl"),
"rb") as fp:
features = pickle.load(fp)
with open(os.path.join(base_name, ft_type + "_snames_train.pkl"),
"rb") as fp:
strokes_name_id = pickle.load(fp)
#####################################################################
# get matrix of features from dictionary (N, vec_size)
vecs = []
for key in sorted(list(features.keys())):
vecs.append(features[key])
vecs = np.vstack(vecs)
vecs[np.isnan(vecs)] = 0
vecs[np.isinf(vecs)] = 0
#fc7 layer output size (4096)
INP_VEC_SIZE = vecs.shape[-1]
print("INP_VEC_SIZE = ", INP_VEC_SIZE)
km_filepath = os.path.join(base_name, km_filename)
# # Uncomment only while training.
if not os.path.isfile(km_filepath + "_C" + str(cluster_size) + ".pkl"):
km_model = make_codebook(vecs, cluster_size) #, model_type='gmm')
## # Save to disk, if training is performed
print("Writing the KMeans models to disk...")
pickle.dump(
km_model,
open(km_filepath + "_C" + str(cluster_size) + ".pkl", "wb"))
else:
# Load from disk, for validation and test sets.
km_model = pickle.load(
open(km_filepath + "_C" + str(cluster_size) + ".pkl", 'rb'))
###########################################################################
# Form the training dataset for supervised classification
# Assign the words (flow frames) to their closest cluster centres and count the
# frequency for each document(video). Create IDF bow dataframe by weighting
# df_train is (nVids, 50) for magnitude, with index as videonames
# print("Create a dataframe for C3D FC7 features...")
# df_train_c3d, words_train = create_bovw_c3d_traindf(features, \
# strokes_name_id, km_model, c3dWinSize)
print("Create a dataframe for HOOF features...")
df_train, words_train = create_bovw_df(features, strokes_name_id, km_model,\
base_name, "train")
# read the stroke annotation labels from text file.
vids_list = list(df_train.index)
labs_keys, labs_values = get_cluster_labels(ANNOTATION_FILE)
if min(labs_values) == 1:
labs_values = [l - 1 for l in labs_values]
labs_keys = [k.replace('.avi', '') for k in labs_keys]
train_labels = np.array(
[labs_values[labs_keys.index(v)] for v in vids_list])
###########################################################################
# apply_clustering(df_train, DATASET, LABELS, ANNOTATION_FILE, base_name)
###########################################################################
# print("Training stroke labels : ")
# print(train_labels)
# print(train_labels.shape)
# concat dataframe to contain features and corresponding labels
#df_train = pd.concat([df_train_mag, labs_df], axis=1)
###########################################################################
# Train SVM
clf = LinearSVC(verbose=False, random_state=124, max_iter=3000)
clf.fit(df_train, train_labels)
print("Training Complete.")
###########################################################################
# # Train a classifier on the features.
# print("LDA execution !!! ")
# #Run LDA
#
# # Get list of lists. Each sublist contains video cluster strIDs (words).
# # Eg. [["39","29","39","39","0", ...], ...]
# doc_clean = [doc.split() for doc in words_train]
# #print(doc_clean)
# diction=corpora.Dictionary(doc_clean) # Form a dictionary
# print("printing dictionary after corp {} ".format(diction))
# doc_term_matrix = [diction.doc2bow(doc) for doc in doc_clean]
# #dictionary = corpora.Dictionary(diction)
#
# # Inference using the data.
# ldamodel_obj = gensim.models.ldamodel.LdaModel(doc_term_matrix, \
# num_topics = NUM_TOPICS, id2word=diction, passes=10, \
# random_state=seed)
## ldamodel_obj = gensim.models.ldaseqmodel.LdaSeqModel(doc_term_matrix, \
## num_topics=3, time_slice=[351])
## ldamodel_obj = gensim.models.LsiModel(doc_term_matrix, num_topics=3, \
## id2word = diction)
#
# print("training complete saving to disk ")
# #save model to disk
# joblib.dump(ldamodel_obj, os.path.join(base_name, mnb_modelname+".pkl"))
#
# # Load trained model from disk
# ldamodel_obj = joblib.load(os.path.join(base_name, mnb_modelname+".pkl"))
#
# # Print all the topics
# for i,topic in enumerate(ldamodel_obj.print_topics(num_topics=3, num_words=10)):
# #print("topic is {}".format(topic))
# word = topic[1].split("+")
# print("{} : {} ".format(topic[0], word))
#
# # actions are rows and discovered topics are columns
# topic_action_map = np.zeros((real_topic, NUM_TOPICS))
#
# predicted_labels = []
# #vids_list = list(df_train_mag.index)
# for j,vname in enumerate(vids_list):
# label_vid = train_labels[j]
# # sort the tuples with descending topic probabilities
# for index, score in sorted(ldamodel_obj[doc_term_matrix[j]], key=lambda tup: -1*tup[1]):
## for index in [ldamodel_obj[doc_term_matrix[j]].argmax(axis=0)]:
# # print("Score is : {} of Topic: {}".format(score,index))
# #if score>0.5:
# # topic_action_map[label_vid][index]+=1
## score = ldamodel_obj[doc_term_matrix[j]][index]
# topic_action_map[label_vid][index]+=score
# predicted_labels.append(index)
# break
# print("Training Time : topic action mapping is : ")
# print("topic0 topic1 topic2")
# #coloumn are topics and rows are labels
# print(topic_action_map)
# acc_values_tr, perm_tuples_tr, gt_list, pred_list = calculate_accuracy(train_labels,\
# predicted_labels)
# acc_perc = [sum(k)/len(predicted_labels) for k in acc_values_tr]
#
# best_indx = acc_perc.index(max(acc_perc))
# print("Max Acc. : ", max(acc_perc))
# print("Acc values : ", acc_perc)
# print("Acc values : ", acc_values_tr)
# print("perm_tuples : ", perm_tuples_tr)
#model_ang = joblib.load(os.path.join(destpath, mnb_modelname+"_ang.pkl"))
##################################################################################
# Evaluation on validation set
print("Validation phase ....")
if not os.path.isfile(os.path.join(base_name, ft_type + "_feats_val.pkl")):
# features_val, strokes_name_id_val = select_trimmed_feats(c3dFC7FeatsPath, \
# LABELS, val_lst, c3dWinSize)
features_val, strokes_name_id_val = extract_feats(
DATASET,
LABELS,
CLASS_IDS,
BATCH_SIZE,
SEQ_SIZE,
STEP,
extractor=ft_type,
model_path=model_path,
nclasses=NUM_TOPICS,
part='val')
with open(os.path.join(base_name, ft_type + "_feats_val.pkl"),
"wb") as fp:
pickle.dump(features_val, fp)
with open(os.path.join(base_name, ft_type + "_snames_val.pkl"),
"wb") as fp:
pickle.dump(strokes_name_id_val, fp)
else:
with open(os.path.join(base_name, ft_type + "_feats_val.pkl"),
"rb") as fp:
features_val = pickle.load(fp)
with open(os.path.join(base_name, ft_type + "_snames_val.pkl"),
"rb") as fp:
strokes_name_id_val = pickle.load(fp)
print("Create dataframe BOVW validation set...")
df_val_hoof, words_val = create_bovw_df(features_val, strokes_name_id_val, \
km_model, base_name, "val")
vids_list_val = list(df_val_hoof.index)
val_labels = np.array(
[labs_values[labs_keys.index(v)] for v in vids_list_val])
# topic_action_map_val = np.zeros((real_topic, NUM_TOPICS))
# doc_clean_val = [doc.split() for doc in words_val]
# # Creating Dictionary for val set words
# diction_val=corpora.Dictionary(doc_clean_val)
#
# doc_term_matrix_val = [diction_val.doc2bow(doc) for doc in doc_clean_val]
# predicted_label_val = []
# for j,vname in enumerate(vids_list_val):
# label_vid = val_labels[j]
# for index, score in sorted(ldamodel_obj[doc_term_matrix_val[j]], key=lambda tup: -1*tup[1]):
## for index in [ldamodel_obj[doc_term_matrix[j]].argmax(axis=0)]:
## score = ldamodel_obj[doc_term_matrix[j]][index]
# # print("Score is : {} of Topic: {}".format(score,index))
# #if score>0.5:
# # topic_action_map_val[label_vid][index]+=1
# topic_action_map_val[label_vid][index]+=score
# predicted_label_val.append(index)
# break
#
# print(topic_action_map_val)
# labs_df = pd.DataFrame(labels, index=vids_list, columns=['label'])
#
print("Evaluating on the validation set...")
# evaluate(model_mag, df_test_mag, labs_df)
# Find maximum permutation accuracy using predicted_label_val and label_val
# acc_values, perm_tuples, gt_list, pred_list = calculate_accuracy(val_labels, \
# predicted_label_val)
# acc_perc = [sum(k)/len(predicted_label_val) for k in acc_values]
#
# best_indx = acc_perc.index(max(acc_perc))
# print("Max Acc. : ", max(acc_perc))
# print("Acc values : ", acc_perc)
# print("Acc values : ", acc_values)
# print("perm_tuples : ", perm_tuples)
###########################################################################
# Evaluate the BOW classifier (SVM)
confusion_mat = np.zeros((NUM_TOPICS, NUM_TOPICS))
pred = clf.predict(df_val_hoof)
correct = 0
for i, true_val in enumerate(val_labels):
if pred[i] == true_val:
correct += 1
confusion_mat[pred[i], true_val] += 1
print('#' * 30)
print("BOW Classification Results:")
print("%d/%d Correct" % (correct, len(pred)))
print("Accuracy = {} ".format(float(correct) / len(pred)))
print("Confusion matrix")
print(confusion_mat)
return (float(correct) / len(pred))
# form the names of the list of label files, should be at destination
train_lab = [f+".json" for f in train_lst]
val_lab = [f+".json" for f in val_lst]
test_lab = [f+".json" for f in test_lst]
# train_lab_main = [f+".json" for f in train_lst_main]
# val_lab_main = [f+".json" for f in val_lst_main]
# get complete path lists of label files
tr_labs = [os.path.join(LABELS, f) for f in train_lab]
val_labs = [os.path.join(LABELS, f) for f in val_lab]
# tr_labs_main = [os.path.join(MAIN_LABELS, f) for f in train_lab_main]
# val_labs_main = [os.path.join(VAL_LABELS, f) for f in val_lab_main]
#####################################################################
sizes = [utils.getNFrames(os.path.join(DATASET, f+".avi")) for f in train_lst]
val_sizes = [utils.getNFrames(os.path.join(DATASET, f+".avi")) for f in val_lst]
# sizes_main = [utils.getNFrames(os.path.join(MAIN_DATASET, f)) for f in train_lst_main_ext]
# val_sizes_main = [utils.getNFrames(os.path.join(VAL_DATASET, f)) for f in val_lst_main_ext]
###########################################################################
# Merge the training highlights and main dataset variables
# train_lab.extend(train_lab_main)
# tr_labs.extend(tr_labs_main)
# sizes.extend(sizes_main)
print("No. of training videos : {}".format(len(train_lst)))
print("Size : {}".format(sizes))
# hlDataset = VideoDataset(tr_labs, sizes, seq_size=SEQ_SIZE, is_train_set = True)
# print(hlDataset.__len__())