def build_ban(num_token,
v_dim,
num_hid,
num_ans,
op='',
gamma=4,
reasoning=False):
w_emb = WordEmbedding(num_token, 300, .0, op)
q_emb = QuestionEmbedding(300 if 'c' not in op else 600, num_hid, 1, False,
.0)
if not reasoning:
v_att = BiAttention(v_dim, num_hid, num_hid, gamma)
else:
v_att = BiAttention(v_dim, num_hid, num_hid, 1)
# constructing the model
b_net = []
q_prj = []
c_prj = []
objects = 36 # minimum number of boxes, originally 10
for i in range(gamma):
b_net.append(BCNet(v_dim, num_hid, num_hid, None, k=1))
q_prj.append(FCNet([num_hid, num_hid], '', .2))
c_prj.append(FCNet([objects + 1, num_hid], 'ReLU', .0))
classifier = SimpleClassifier(num_hid, num_hid * 2, num_ans, .5)
counter = Counter(objects)
if not reasoning:
return BanModel(w_emb, q_emb, v_att, b_net, q_prj, c_prj, classifier,
counter, op, gamma, num_hid)
else:
return BanModel_Reasoning(w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, op, gamma, num_hid)
def build_ban(dataset, num_hid, op='', gamma=4, task='vqa', use_counter=True):
#w_emb = WordEmbedding(dataset.dictionary.ntoken, 300, .0, op)
#q_emb = QuestionEmbedding(300 if 'c' not in op else 600, num_hid, 1, False, .0)
w_emb = AlbertTokenizer.from_pretrained('albert-large-v2')
q_emb = AlbertModel.from_pretrained('albert-large-v2')
params_set = set()
for param in q_emb.parameters():
params_set.add(param)
param.requires_grad = False
v_att = BiAttention(dataset.v_dim, num_hid, num_hid, gamma)
if task == 'vqa':
b_net = []
q_prj = []
c_prj = []
objects = 10 # minimum number of boxes
for i in range(gamma):
b_net.append(BCNet(dataset.v_dim, num_hid, num_hid, None, k=1))
q_prj.append(FCNet([num_hid, num_hid], '', .2))
c_prj.append(FCNet([objects + 1, num_hid], 'ReLU', .0))
classifier = SimpleClassifier(num_hid, num_hid * 2,
dataset.num_ans_candidates, .5)
counter = Counter(objects) if use_counter else None
return BanModel(dataset, params_set, w_emb, q_emb, v_att, b_net, q_prj,
c_prj, classifier, counter, op, gamma)
elif task == 'flickr':
return BanModel_flickr(w_emb, q_emb, v_att, op, gamma)
def build_BAN(dataset, args, priotize_using_counter=False):
# init word embedding module, question embedding module, and Attention network
w_emb = WordEmbedding(dataset.dictionary.ntoken, 300, .0, args.op)
q_emb = QuestionEmbedding(300 if 'c' not in args.op else 600, args.num_hid,
1, False, .0, args.rnn)
v_att = BiAttention(dataset.v_dim, args.num_hid, args.num_hid, args.gamma)
# build and load pre-trained MAML model
if args.maml:
weight_path = args.RAD_dir + '/' + args.maml_model_path
print('load initial weights MAML from: %s' % (weight_path))
maml_v_emb = SimpleCNN(weight_path, args.eps_cnn, args.momentum_cnn)
# build and load pre-trained Auto-encoder model
if args.autoencoder:
ae_v_emb = Auto_Encoder_Model()
weight_path = args.RAD_dir + '/' + args.ae_model_path
print('load initial weights DAE from: %s' % (weight_path))
ae_v_emb.load_state_dict(torch.load(weight_path))
# Loading tfidf weighted embedding
if hasattr(args, 'tfidf'):
w_emb = tfidf_loading(args.tfidf, w_emb, args)
# Optional module: counter for BAN
use_counter = args.use_counter if priotize_using_counter is None else priotize_using_counter
if use_counter or priotize_using_counter:
objects = 10 # minimum number of boxes
if use_counter or priotize_using_counter:
counter = Counter(objects)
else:
counter = None
# init BAN residual network
b_net = []
q_prj = []
c_prj = []
for i in range(args.gamma):
b_net.append(
BCNet(dataset.v_dim, args.num_hid, args.num_hid, None, k=1))
q_prj.append(FCNet([args.num_hid, args.num_hid], '', .2))
if use_counter or priotize_using_counter:
c_prj.append(FCNet([objects + 1, args.num_hid], 'ReLU', .0))
# init classifier
classifier = SimpleClassifier(args.num_hid, args.num_hid * 2,
dataset.num_ans_candidates, args)
# contruct VQA model and return
if args.maml and args.autoencoder:
return BAN_Model(dataset, w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, args, maml_v_emb, ae_v_emb)
elif args.maml:
return BAN_Model(dataset, w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, args, maml_v_emb, None)
elif args.autoencoder:
return BAN_Model(dataset, w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, args, None, ae_v_emb)
return BAN_Model(dataset, w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, args, None, None)
def build_ban_foil(dataset, num_hid, num_ans_candidates, op='', gamma=4):
w_emb = WordEmbedding(dataset.dictionary.ntoken, 300, .0, op)
q_emb = QuestionEmbedding(300 if 'c' not in op else 600, num_hid, 1, False,
.0)
v_att = BiAttention(dataset.v_dim, num_hid, num_hid, gamma)
b_net = []
q_prj = []
c_prj = []
objects = 10 # minimum number of boxes
for i in range(gamma):
b_net.append(BCNet(dataset.v_dim, num_hid, num_hid, None, k=1))
q_prj.append(FCNet([num_hid, num_hid], '', .2))
c_prj.append(FCNet([objects + 1, num_hid], 'ReLU', .0))
classifier = SimpleClassifierFoil(num_hid, 64, num_ans_candidates)
counter = Counter(objects)
return BanModel(dataset, w_emb, q_emb, v_att, b_net, q_prj, c_prj,
classifier, counter, op, gamma)
def build_ban(dataset, num_hid, op='', gamma=4, q_emb_type='bert', on_do_q=False, finetune_q=False):
if 'bert' in q_emb_type:
q_emb = BertModel.from_pretrained('bert-base-multilingual-cased')
q_dim = 768
elif 'rg' in q_emb_type:
w_dim = 100
q_dim = num_hid
q_emb = RnnQuestionEmbedding(dataset.dictionary.ntoken, w_dim, q_dim, op)
elif 'pkb' in q_emb_type:
w_dim = 200
q_dim = num_hid
q_emb = RnnQuestionEmbedding(dataset.dictionary.ntoken, w_dim, q_dim, op)
if 'bertrnn' in q_emb_type:
q_emb = BertRnnQuestionEmbedding(q_emb, 200, num_hid, op)
q_dim = num_hid
if not finetune_q: # Freeze question embedding
if isinstance(q_emb, BertModel):
for p in q_emb.parameters():
p.requires_grad_(False)
else:
for p in q_emb.w_emb.parameters():
p.requires_grad_(False)
if not on_do_q: # Remove dropout of question embedding
for m in q_emb.modules():
if isinstance(m, nn.Dropout):
m.p = 0.
v_att = BiAttention(dataset.v_dim, q_dim, num_hid, gamma)
b_net = []
q_prj = []
c_prj = []
objects = 10 # minimum number of boxes
for i in range(gamma):
b_net.append(BCNet(dataset.v_dim, q_dim, num_hid, None, k=1))
q_prj.append(FCNet([num_hid, q_dim], '', .2))
c_prj.append(FCNet([objects + 1, q_dim], 'ReLU', .0))
classifiers = [SimpleClassifier(q_dim, num_hid * 2, dataset.num_ans_candidates, .5),
SimpleClassifier(q_dim, num_hid * 2, 1, .5)]
counter = Counter(objects)
return BanModel(dataset, q_emb, v_att, b_net, q_prj, c_prj, classifiers, counter, op, gamma)