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
|
import os
import numpy as np
import PIL
import torch
from PIL import Image
from torch.utils.data import Dataset
from torchvision import transforms
import random
import tqdm
class PersonalizedBase(Dataset):
def __init__(self, data_root, size=None, repeats=100, flip_p=0.5, placeholder_token="*", width=512, height=512, model=None, device=None, template_file=None):
self.placeholder_token = placeholder_token
self.size = size
self.width = width
self.height = height
self.flip = transforms.RandomHorizontalFlip(p=flip_p)
self.dataset = []
with open(template_file, "r") as file:
lines = [x.strip() for x in file.readlines()]
self.lines = lines
assert data_root, 'dataset directory not specified'
self.image_paths = [os.path.join(data_root, file_path) for file_path in os.listdir(data_root)]
print("Preparing dataset...")
for path in tqdm.tqdm(self.image_paths):
image = Image.open(path)
image = image.convert('RGB')
image = image.resize((self.width, self.height), PIL.Image.BICUBIC)
filename = os.path.basename(path)
filename_tokens = os.path.splitext(filename)[0].replace('_', '-').replace(' ', '-').split('-')
filename_tokens = [token for token in filename_tokens if token.isalpha()]
npimage = np.array(image).astype(np.uint8)
npimage = (npimage / 127.5 - 1.0).astype(np.float32)
torchdata = torch.from_numpy(npimage).to(device=device, dtype=torch.float32)
torchdata = torch.moveaxis(torchdata, 2, 0)
init_latent = model.get_first_stage_encoding(model.encode_first_stage(torchdata.unsqueeze(dim=0))).squeeze()
self.dataset.append((init_latent, filename_tokens))
self.length = len(self.dataset) * repeats
self.initial_indexes = np.arange(self.length) % len(self.dataset)
self.indexes = None
self.shuffle()
def shuffle(self):
self.indexes = self.initial_indexes[torch.randperm(self.initial_indexes.shape[0])]
def __len__(self):
return self.length
def __getitem__(self, i):
if i % len(self.dataset) == 0:
self.shuffle()
index = self.indexes[i % len(self.indexes)]
x, filename_tokens = self.dataset[index]
text = random.choice(self.lines)
text = text.replace("[name]", self.placeholder_token)
text = text.replace("[filewords]", ' '.join(filename_tokens))
return x, text
|
