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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
import copy
import itertools
import os
from pathlib import Path
import html
import gc
import gradio as gr
import torch
from PIL import Image
from torch import optim
from modules import shared
from transformers import CLIPModel, CLIPProcessor, CLIPTokenizer
from tqdm.auto import tqdm, trange
from modules.shared import opts, device
def get_all_images_in_folder(folder):
return [os.path.join(folder, f) for f in os.listdir(folder) if
os.path.isfile(os.path.join(folder, f)) and check_is_valid_image_file(f)]
def check_is_valid_image_file(filename):
return filename.lower().endswith(('.png', '.jpg', '.jpeg', ".gif", ".tiff", ".webp"))
def batched(dataset, total, n=1):
for ndx in range(0, total, n):
yield [dataset.__getitem__(i) for i in range(ndx, min(ndx + n, total))]
def iter_to_batched(iterable, n=1):
it = iter(iterable)
while True:
chunk = tuple(itertools.islice(it, n))
if not chunk:
return
yield chunk
def create_ui():
import modules.ui
with gr.Group():
with gr.Accordion("Open for Clip Aesthetic!", open=False):
with gr.Row():
aesthetic_weight = gr.Slider(minimum=0, maximum=1, step=0.01, label="Aesthetic weight",
value=0.9)
aesthetic_steps = gr.Slider(minimum=0, maximum=50, step=1, label="Aesthetic steps", value=5)
with gr.Row():
aesthetic_lr = gr.Textbox(label='Aesthetic learning rate',
placeholder="Aesthetic learning rate", value="0.0001")
aesthetic_slerp = gr.Checkbox(label="Slerp interpolation", value=False)
aesthetic_imgs = gr.Dropdown(sorted(shared.aesthetic_embeddings.keys()),
label="Aesthetic imgs embedding",
value="None")
modules.ui.create_refresh_button(aesthetic_imgs, shared.update_aesthetic_embeddings, lambda: {"choices": sorted(shared.aesthetic_embeddings.keys())}, "refresh_aesthetic_embeddings")
with gr.Row():
aesthetic_imgs_text = gr.Textbox(label='Aesthetic text for imgs',
placeholder="This text is used to rotate the feature space of the imgs embs",
value="")
aesthetic_slerp_angle = gr.Slider(label='Slerp angle', minimum=0, maximum=1, step=0.01,
value=0.1)
aesthetic_text_negative = gr.Checkbox(label="Is negative text", value=False)
return aesthetic_weight, aesthetic_steps, aesthetic_lr, aesthetic_slerp, aesthetic_imgs, aesthetic_imgs_text, aesthetic_slerp_angle, aesthetic_text_negative
aesthetic_clip_model = None
def aesthetic_clip():
global aesthetic_clip_model
if aesthetic_clip_model is None or aesthetic_clip_model.name_or_path != shared.sd_model.cond_stage_model.wrapped.transformer.name_or_path:
aesthetic_clip_model = CLIPModel.from_pretrained(shared.sd_model.cond_stage_model.wrapped.transformer.name_or_path)
aesthetic_clip_model.cpu()
return aesthetic_clip_model
def generate_imgs_embd(name, folder, batch_size):
model = aesthetic_clip().to(device)
processor = CLIPProcessor.from_pretrained(model.name_or_path)
with torch.no_grad():
embs = []
for paths in tqdm(iter_to_batched(get_all_images_in_folder(folder), batch_size),
desc=f"Generating embeddings for {name}"):
if shared.state.interrupted:
break
inputs = processor(images=[Image.open(path) for path in paths], return_tensors="pt").to(device)
outputs = model.get_image_features(**inputs).cpu()
embs.append(torch.clone(outputs))
inputs.to("cpu")
del inputs, outputs
embs = torch.cat(embs, dim=0).mean(dim=0, keepdim=True)
# The generated embedding will be located here
path = str(Path(shared.cmd_opts.aesthetic_embeddings_dir) / f"{name}.pt")
torch.save(embs, path)
model.cpu()
del processor
del embs
gc.collect()
torch.cuda.empty_cache()
res = f"""
Done generating embedding for {name}!
Aesthetic embedding saved to {html.escape(path)}
"""
shared.update_aesthetic_embeddings()
return gr.Dropdown.update(choices=sorted(shared.aesthetic_embeddings.keys()), label="Imgs embedding",
value="None"), \
gr.Dropdown.update(choices=sorted(shared.aesthetic_embeddings.keys()),
label="Imgs embedding",
value="None"), res, ""
def slerp(low, high, val):
low_norm = low / torch.norm(low, dim=1, keepdim=True)
high_norm = high / torch.norm(high, dim=1, keepdim=True)
omega = torch.acos((low_norm * high_norm).sum(1))
so = torch.sin(omega)
res = (torch.sin((1.0 - val) * omega) / so).unsqueeze(1) * low + (torch.sin(val * omega) / so).unsqueeze(1) * high
return res
class AestheticCLIP:
def __init__(self):
self.skip = False
self.aesthetic_steps = 0
self.aesthetic_weight = 0
self.aesthetic_lr = 0
self.slerp = False
self.aesthetic_text_negative = ""
self.aesthetic_slerp_angle = 0
self.aesthetic_imgs_text = ""
self.image_embs_name = None
self.image_embs = None
self.load_image_embs(None)
def set_aesthetic_params(self, p, aesthetic_lr=0, aesthetic_weight=0, aesthetic_steps=0, image_embs_name=None,
aesthetic_slerp=True, aesthetic_imgs_text="",
aesthetic_slerp_angle=0.15,
aesthetic_text_negative=False):
self.aesthetic_imgs_text = aesthetic_imgs_text
self.aesthetic_slerp_angle = aesthetic_slerp_angle
self.aesthetic_text_negative = aesthetic_text_negative
self.slerp = aesthetic_slerp
self.aesthetic_lr = aesthetic_lr
self.aesthetic_weight = aesthetic_weight
self.aesthetic_steps = aesthetic_steps
self.load_image_embs(image_embs_name)
if self.image_embs_name is not None:
p.extra_generation_params.update({
"Aesthetic LR": aesthetic_lr,
"Aesthetic weight": aesthetic_weight,
"Aesthetic steps": aesthetic_steps,
"Aesthetic embedding": self.image_embs_name,
"Aesthetic slerp": aesthetic_slerp,
"Aesthetic text": aesthetic_imgs_text,
"Aesthetic text negative": aesthetic_text_negative,
"Aesthetic slerp angle": aesthetic_slerp_angle,
})
def set_skip(self, skip):
self.skip = skip
def load_image_embs(self, image_embs_name):
if image_embs_name is None or len(image_embs_name) == 0 or image_embs_name == "None":
image_embs_name = None
self.image_embs_name = None
if image_embs_name is not None and self.image_embs_name != image_embs_name:
self.image_embs_name = image_embs_name
self.image_embs = torch.load(shared.aesthetic_embeddings[self.image_embs_name], map_location=device)
self.image_embs /= self.image_embs.norm(dim=-1, keepdim=True)
self.image_embs.requires_grad_(False)
def __call__(self, z, remade_batch_tokens):
if not self.skip and self.aesthetic_steps != 0 and self.aesthetic_lr != 0 and self.aesthetic_weight != 0 and self.image_embs_name is not None:
tokenizer = shared.sd_model.cond_stage_model.tokenizer
if not opts.use_old_emphasis_implementation:
remade_batch_tokens = [
[tokenizer.bos_token_id] + x[:75] + [tokenizer.eos_token_id] for x in
remade_batch_tokens]
tokens = torch.asarray(remade_batch_tokens).to(device)
model = copy.deepcopy(aesthetic_clip()).to(device)
model.requires_grad_(True)
if self.aesthetic_imgs_text is not None and len(self.aesthetic_imgs_text) > 0:
text_embs_2 = model.get_text_features(
**tokenizer([self.aesthetic_imgs_text], padding=True, return_tensors="pt").to(device))
if self.aesthetic_text_negative:
text_embs_2 = self.image_embs - text_embs_2
text_embs_2 /= text_embs_2.norm(dim=-1, keepdim=True)
img_embs = slerp(self.image_embs, text_embs_2, self.aesthetic_slerp_angle)
else:
img_embs = self.image_embs
with torch.enable_grad():
# We optimize the model to maximize the similarity
optimizer = optim.Adam(
model.text_model.parameters(), lr=self.aesthetic_lr
)
for _ in trange(self.aesthetic_steps, desc="Aesthetic optimization"):
text_embs = model.get_text_features(input_ids=tokens)
text_embs = text_embs / text_embs.norm(dim=-1, keepdim=True)
sim = text_embs @ img_embs.T
loss = -sim
optimizer.zero_grad()
loss.mean().backward()
optimizer.step()
zn = model.text_model(input_ids=tokens, output_hidden_states=-opts.CLIP_stop_at_last_layers)
if opts.CLIP_stop_at_last_layers > 1:
zn = zn.hidden_states[-opts.CLIP_stop_at_last_layers]
zn = model.text_model.final_layer_norm(zn)
else:
zn = zn.last_hidden_state
model.cpu()
del model
gc.collect()
torch.cuda.empty_cache()
zn = torch.concat([zn[77 * i:77 * (i + 1)] for i in range(max(z.shape[1] // 77, 1))], 1)
if self.slerp:
z = slerp(z, zn, self.aesthetic_weight)
else:
z = z * (1 - self.aesthetic_weight) + zn * self.aesthetic_weight
return z
|
