def pre_process_dataset(image_dir, qjson, ajson, img_prefix):
print('Preprocessing datatset. \n')
vqa = VQA(ajson, qjson)
img_names = [f for f in os.listdir(image_dir) if '.jpg' in f]
img_names = img_names[:30000]
print("length: ", len(img_names))
img_ids = []
for fname in img_names:
img_id = fname.split('.')[0].rpartition(img_prefix)[-1]
img_ids.append(int(img_id))
print("Done collecting image ids")
ques_ids = vqa.getQuesIds(img_ids)
q2i = defaultdict(lambda: len(q2i))
pad = q2i["<pad>"]
start = q2i["<sos>"]
end = q2i["<eos>"]
UNK = q2i["<unk>"]
a2i_count = {}
for ques_id in ques_ids:
qa = vqa.loadQA(ques_id)[0]
qqa = vqa.loadQQA(ques_id)[0]
ques = qqa['question'][:-1]
[q2i[x] for x in ques.lower().strip().split(" ")]
answers = qa['answers']
for ans in answers:
if not ans['answer_confidence'] == 'yes':
continue
ans = ans['answer'].lower()
if ans not in a2i_count:
a2i_count[ans] = 1
else:
a2i_count[ans] = a2i_count[ans] + 1
print("Done collecting Q/A")
a_sort = sorted(a2i_count.items(),
key=operator.itemgetter(1),
reverse=True)
i2a = {}
count = 0
a2i = defaultdict(lambda: len(a2i))
for word, _ in a_sort:
a2i[word]
i2a[a2i[word]] = word
count = count + 1
if count == 1000:
break
print("Done collecting words")
return q2i, a2i, i2a, a2i_count
for fname in img_names:
img_id = fname.split('.')[0].rpartition(img_prefix)[-1]
img_ids.append(int(img_id))
ques_ids = vqa.getQuesIds(img_ids)
q2i = defaultdict(lambda: len(q2i))
pad = q2i["<pad>"]
start = q2i["<sos>"]
end = q2i["<eos>"]
UNK = q2i["<unk>"]
a2i_count = {}
for ques_id in ques_ids:
qa = vqa.loadQA(ques_id)[0]
qqa = vqa.loadQQA(ques_id)[0]
ques = qqa['question'][:-1]
[q2i[x] for x in ques.lower().strip().split(" ")]
answers = qa['answers']
for ans in answers:
if not ans['answer_confidence'] == 'yes':
continue
ans = ans['answer'].lower()
if ans not in a2i_count:
a2i_count[ans] = 1
else:
a2i_count[ans] = a2i_count[ans] + 1
a_sort = sorted(a2i_count.items(), key=operator.itemgetter(1), reverse=True)
class VqaDataset(Dataset):
def __init__(self,
image_dir,
question_json_file_path,
annotation_json_file_path,
image_filename_pattern,
collate=False,
q2i=None,
a2i=None,
i2a=None,
a2i_count=None,
img_names=None,
img_ids=None,
ques_ids=None,
method='simple',
dataset_type='train',
enc_dir=''):
print(method)
self.image_dir = image_dir
self.qjson = question_json_file_path
self.ajson = annotation_json_file_path
img_prefix = image_filename_pattern.split('{}')[0]
self.collate = collate
self.q2i = q2i
self.a2i = a2i
self.i2a = i2a
self.a2i_count = a2i_count
self.img_ids = img_ids
self.ques_ids = ques_ids
self.img_names = img_names
self.method = method
self.vqa = VQA(self.ajson, self.qjson)
if self.method == 'simple':
self.transform = transforms.Compose(
[transforms.Resize((224, 224)),
transforms.ToTensor()])
else:
self.transform = transforms.Compose(
[transforms.Resize((448, 448)),
transforms.ToTensor()])
if not collate:
self.img_names = [
f for f in os.listdir(self.image_dir) if '.jpg' in f
]
#print(self.img_names)
self.img_ids = []
for fname in self.img_names:
img_id = fname.split('.')[0].rpartition(img_prefix)[-1]
self.img_ids.append(int(img_id))
self.ques_ids = self.vqa.getQuesIds(self.img_ids)
self.q2i, self.a2i, self.i2a, self.a2i_count = pre_process_dataset(
image_dir, self.qjson, self.ajson, img_prefix)
#print("Image names ",self.img_names)
self.q2i_len = len(self.q2i)
self.a2i_len = len(self.a2i.keys())
self.q2i_keys = self.q2i.keys()
self.enc_dir = enc_dir
def __len__(self):
return len(self.ques_ids)
def __getitem__(self, idx):
ques_id = self.ques_ids[idx]
img_id = self.vqa.getImgIds([ques_id])[0]
qa = self.vqa.loadQA(ques_id)[0]
qqa = self.vqa.loadQQA(ques_id)[0]
img_name = self.img_names[self.img_ids.index(img_id)]
if self.method == 'simple':
img = default_loader(self.image_dir + '/' + img_name)
#imgT = self.transform(img).permute(1, 2, 0)
imgT = self.transform(img).float()
else:
img = default_loader(self.image_dir + '/' + img_name)
imgT = self.transform(img).float()
ques = qqa['question'][:-1]
quesI = [self.q2i["<sos>"]] + [
self.q2i[x.lower()]
for x in ques.split(" ") if x.lower() in self.q2i_keys
] + [self.q2i["<eos>"]]
if not self.collate:
quesI = quesI + [self.q2i["<pad>"]] * (8 - len(quesI))
if self.method == 'simple':
quesT = torch.zeros(self.q2i_len).float()
for idx in quesI:
quesT[idx] = 1
else:
quesT = torch.from_numpy(np.array(quesI)).long()
answers = qa['answers']
max_count = 0
answer = ""
for ans in answers:
#if not ans['answer_confidence'] == 'yes':
# continue
ans = ans['answer'].lower()
if ans in self.a2i.keys() and self.a2i_count[ans] > max_count:
max_count = self.a2i_count[ans]
answer = ans
if answer == "": # only for validation
gT = torch.from_numpy(np.array([self.a2i_len])).long()
else:
gT = torch.from_numpy(np.array([self.a2i[answer]])).long()
if not self.collate:
return {'img': imgT, 'ques': quesT, 'gt': gT}
return imgT, quesT, gT, img_name, ques, answer