File size: 7,191 Bytes
a166479 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 |
import os
import sys
import torch.utils.data as data
import torch
from torchvision import transforms
from torch.autograd import Variable
import numpy as np
from PIL import Image
import torchvision.transforms.functional as TF
import random
from bert.tokenization_bert import BertTokenizer
import h5py
from refer.refer import REFER
from args import get_parser
# Dataset configuration initialization
parser = get_parser()
args = parser.parse_args()
from hfai.datasets import CocoDetection
from PIL import Image
import numpy as np
#from ffrecord.torch import DataLoader,Dataset
import ffrecord
_EXIF_ORIENT = 274
def _apply_exif_orientation(image):
"""
Applies the exif orientation correctly.
This code exists per the bug:
https://github.com/python-pillow/Pillow/issues/3973
with the function `ImageOps.exif_transpose`. The Pillow source raises errors with
various methods, especially `tobytes`
Function based on:
https://github.com/wkentaro/labelme/blob/v4.5.4/labelme/utils/image.py#L59
https://github.com/python-pillow/Pillow/blob/7.1.2/src/PIL/ImageOps.py#L527
Args:
image (PIL.Image): a PIL image
Returns:
(PIL.Image): the PIL image with exif orientation applied, if applicable
"""
if not hasattr(image, "getexif"):
return image
try:
exif = image.getexif()
except Exception: # https://github.com/facebookresearch/detectron2/issues/1885
exif = None
if exif is None:
return image
orientation = exif.get(_EXIF_ORIENT)
method = {
2: Image.FLIP_LEFT_RIGHT,
3: Image.ROTATE_180,
4: Image.FLIP_TOP_BOTTOM,
5: Image.TRANSPOSE,
6: Image.ROTATE_270,
7: Image.TRANSVERSE,
8: Image.ROTATE_90,
}.get(orientation)
if method is not None:
return image.transpose(method)
return image
def convert_PIL_to_numpy(image, format):
"""
Convert PIL image to numpy array of target format.
Args:
image (PIL.Image): a PIL image
format (str): the format of output image
Returns:
(np.ndarray): also see `read_image`
"""
if format is not None:
# PIL only supports RGB, so convert to RGB and flip channels over below
conversion_format = format
if format in ["BGR", "YUV-BT.601"]:
conversion_format = "RGB"
image = image.convert(conversion_format)
image = np.asarray(image)
# PIL squeezes out the channel dimension for "L", so make it HWC
if format == "L":
image = np.expand_dims(image, -1)
# handle formats not supported by PIL
elif format == "BGR":
# flip channels if needed
image = image[:, :, ::-1]
elif format == "YUV-BT.601":
image = image / 255.0
image = np.dot(image, np.array(_M_RGB2YUV).T)
return image
class ReferDataset(data.Dataset):
#class ReferDataset(ffrecord.torch.Dataset):
def __init__(self,
args,
image_transforms=None,
target_transforms=None,
split='train',
eval_mode=False):
self.classes = []
self.image_transforms = image_transforms
self.target_transform = target_transforms
self.split = split
self.refer = REFER(args.refer_data_root, args.dataset, args.splitBy)
self.max_tokens = 40
ref_ids = self.refer.getRefIds(split=self.split)
img_ids = self.refer.getImgIds(ref_ids)
all_imgs = self.refer.Imgs
self.imgs = list(all_imgs[i] for i in img_ids)
self.ref_ids = ref_ids
self.input_ids = []
self.attention_masks = []
self.tokenizer = BertTokenizer.from_pretrained(args.bert_tokenizer)
self.eval_mode = eval_mode
# if we are testing on a dataset, test all sentences of an object;
# o/w, we are validating during training, randomly sample one sentence for efficiency
for r in ref_ids:
ref = self.refer.Refs[r]
sentences_for_ref = []
attentions_for_ref = []
for i, (el, sent_id) in enumerate(zip(ref['sentences'], ref['sent_ids'])):
sentence_raw = el['raw']
attention_mask = [0] * self.max_tokens
padded_input_ids = [0] * self.max_tokens
input_ids = self.tokenizer.encode(text=sentence_raw, add_special_tokens=True)
# truncation of tokens
input_ids = input_ids[:self.max_tokens]
padded_input_ids[:len(input_ids)] = input_ids
attention_mask[:len(input_ids)] = [1]*len(input_ids)
sentences_for_ref.append(torch.tensor(padded_input_ids).unsqueeze(0))
attentions_for_ref.append(torch.tensor(attention_mask).unsqueeze(0))
self.input_ids.append(sentences_for_ref)
self.attention_masks.append(attentions_for_ref)
split = 'train'
print(split)
self.hfai_dataset = CocoDetection(split, transform=None)
self.keys = {}
for i in range(len(self.hfai_dataset.reader.ids)):
self.keys[self.hfai_dataset.reader.ids[i]] = i
def get_classes(self):
return self.classes
def __len__(self):
return len(self.ref_ids)
def __getitem__(self, index):
#print(index)
#index = index[0]
this_ref_id = self.ref_ids[index]
this_img_id = self.refer.getImgIds(this_ref_id)
this_img = self.refer.Imgs[this_img_id[0]]
#print("this_ref_id", this_ref_id)
#print("this_img_id", this_img_id)
#print("this_img", this_img)
#img = Image.open(os.path.join(self.refer.IMAGE_DIR, this_img['file_name'])).convert("RGB")
img = self.hfai_dataset.reader.read_imgs([self.keys[this_img_id[0]]])[0]
img = _apply_exif_orientation(img)
img = convert_PIL_to_numpy(img, 'RGB')
#print(img.shape)
img = Image.fromarray(img)
ref = self.refer.loadRefs(this_ref_id)
ref_mask = np.array(self.refer.getMask(ref[0])['mask'])
annot = np.zeros(ref_mask.shape)
annot[ref_mask == 1] = 1
annot = Image.fromarray(annot.astype(np.uint8), mode="P")
if self.image_transforms is not None:
# resize, from PIL to tensor, and mean and std normalization
img, target = self.image_transforms(img, annot)
if self.eval_mode:
embedding = []
att = []
for s in range(len(self.input_ids[index])):
e = self.input_ids[index][s]
a = self.attention_masks[index][s]
embedding.append(e.unsqueeze(-1))
att.append(a.unsqueeze(-1))
tensor_embeddings = torch.cat(embedding, dim=-1)
attention_mask = torch.cat(att, dim=-1)
else:
choice_sent = np.random.choice(len(self.input_ids[index]))
tensor_embeddings = self.input_ids[index][choice_sent]
attention_mask = self.attention_masks[index][choice_sent]
#print(img.shape)
return img, target, tensor_embeddings, attention_mask
|