x clip
0.14.4
Une implémentation concise mais complète de CLIP avec diverses améliorations expérimentales issues d'articles récents
$ pip install x-clip import torch
from x_clip import CLIP
clip = CLIP (
dim_text = 512 ,
dim_image = 512 ,
dim_latent = 512 ,
num_text_tokens = 10000 ,
text_enc_depth = 6 ,
text_seq_len = 256 ,
text_heads = 8 ,
visual_enc_depth = 6 ,
visual_image_size = 256 ,
visual_patch_size = 32 ,
visual_heads = 8 ,
visual_patch_dropout = 0.5 , # patch dropout probability, used in Kaiming He's FLIP to save compute and improve end results - 0.5 is good value, 0.75 on high end is tolerable
use_all_token_embeds = False , # whether to use fine-grained contrastive learning (FILIP)
decoupled_contrastive_learning = True , # use decoupled contrastive learning (DCL) objective function, removing positive pairs from the denominator of the InfoNCE loss (CLOOB + DCL)
extra_latent_projection = True , # whether to use separate projections for text-to-image vs image-to-text comparisons (CLOOB)
use_visual_ssl = True , # whether to do self supervised learning on iages
use_mlm = False , # use masked language learning (MLM) on text (DeCLIP)
text_ssl_loss_weight = 0.05 , # weight for text MLM loss
image_ssl_loss_weight = 0.05 # weight for image self-supervised learning loss
)
# mock data
text = torch . randint ( 0 , 10000 , ( 4 , 256 ))
images = torch . randn ( 4 , 3 , 256 , 256 )
# train
loss = clip (
text ,
images ,
freeze_image_encoder = False , # whether to freeze image encoder if using a pretrained image net, proposed by LiT paper
return_loss = True # needs to be set to True to return contrastive loss
)
loss . backward () Vous pouvez également faire passer un transformateur visuel externe / filet résiduel. Vous devez simplement vous assurer que votre encodeur d'image renvoie un ensemble d'intégrations sous la forme batch x seq x dim , et vous assurer que dim_image est correctement spécifié comme dimension des intégrations renvoyées. Vous trouverez ci-dessous un exemple utilisant le transformateur de vision de vit_pytorch
$ pip install vit_pytorch > =0.25.6 import torch
from x_clip import CLIP
from vit_pytorch import ViT
from vit_pytorch . extractor import Extractor
base_vit = ViT (
image_size = 256 ,
patch_size = 32 ,
num_classes = 1000 ,
dim = 512 ,
depth = 6 ,
heads = 16 ,
mlp_dim = 2048 ,
dropout = 0.1 ,
emb_dropout = 0.1
)
vit = Extractor (
base_vit ,
return_embeddings_only = True
)
clip = CLIP (
image_encoder = vit ,
dim_image = 512 , # must be set as the same dimensions as the vision transformer above
dim_text = 512 ,
dim_latent = 512 ,
num_text_tokens = 10000 ,
text_enc_depth = 6 ,
text_seq_len = 256 ,
text_heads = 8
)
text = torch . randint ( 0 , 10000 , ( 4 , 256 ))
images = torch . randn ( 4 , 3 , 256 , 256 )
loss = clip ( text , images , return_loss = True )
loss . backward ()Enfin, on peut également faire en sorte que le transformateur de texte soit défini en externe. Il devra pour l’instant renvoyer les intégrations, y compris le jeton CLS.
import torch
from x_clip import CLIP , TextTransformer
from vit_pytorch import ViT
from vit_pytorch . extractor import Extractor
base_vit = ViT (
image_size = 256 ,
patch_size = 32 ,
num_classes = 1000 ,
dim = 512 ,
depth = 6 ,
heads = 16 ,
mlp_dim = 2048 ,
dropout = 0.1 ,
emb_dropout = 0.1
)
image_encoder = Extractor (
base_vit ,
return_embeddings_only = True
)
text_encoder = TextTransformer (
dim = 512 ,
num_tokens = 10000 ,
max_seq_len = 256 ,
depth = 6 ,
heads = 8
)
clip = CLIP (
image_encoder = image_encoder ,
text_encoder = text_encoder ,
dim_image = 512 ,
dim_text = 512 ,
dim_latent = 512
)
text = torch . randint ( 0 , 10000 , ( 4 , 256 ))
images = torch . randn ( 4 , 3 , 256 , 256 )
loss = clip ( text , images , return_loss = True )
loss . backward () Ce référentiel prend également en charge la perte d'apprentissage contrastive multi-vues, comme proposé dans DeCLIP. Transmettez simplement le texte augmenté et/ou l'image augmentée, et il sera automatiquement calculé, pondéré par multiview_loss_weight défini lors de l'initialisation.
ex.
import torch
from x_clip import CLIP , TextTransformer
from vit_pytorch import ViT
from vit_pytorch . extractor import Extractor
base_vit = ViT (
image_size = 256 ,
patch_size = 32 ,
num_classes = 1000 ,
dim = 512 ,
depth = 6 ,
heads = 16 ,
mlp_dim = 2048 ,
dropout = 0.1 ,
emb_dropout = 0.1
)
image_encoder = Extractor (
base_vit ,
return_embeddings_only = True
)
text_encoder = TextTransformer (
dim = 512 ,
num_tokens = 10000 ,
max_seq_len = 256 + 1 ,
depth = 6 ,
heads = 8
)
clip = CLIP (
image_encoder = image_encoder ,
text_encoder = text_encoder ,
dim_image = 512 ,
dim_text = 512 ,
dim_latent = 512 ,
extra_latent_projection = True ,
multiview_loss_weight = 0.1 # weight multiview contrastive loss by 0.1
)
text = torch . randint ( 0 , 10000 , ( 4 , 256 ))
images = torch . randn ( 4 , 3 , 256 , 256 )
aug_text = torch . randint ( 0 , 10000 , ( 4 , 256 )) # augmented text (backtranslation or EDA), same dimensions as text
aug_images = torch . randn ( 4 , 3 , 256 , 256 ) # augmented images, same dimension as images above
loss = clip (
text ,
images ,
aug_text = aug_text , # pass in augmented texts
aug_image = aug_images , # pass in augmented images
return_loss = True ,
freeze_image_encoder = True
)
loss . backward ()Vous pouvez même envoyer plusieurs textes ou images augmentés
# ...
aug_texts = (
torch . randint ( 0 , 10000 , ( 4 , 256 )),
torch . randint ( 0 , 10000 , ( 4 , 256 )),
)
aug_images = (
torch . randn ( 4 , 3 , 256 , 256 ),
torch . randn ( 4 , 3 , 256 , 256 ),
)
loss = clip (
text ,
images ,
aug_text = aug_texts ,
aug_image = aug_images ,
return_loss = True ,
freeze_image_encoder = True
)
loss . backward () Vous pouvez transmettre votre propre module d'apprentissage auto-supervisé de vision via le mot-clé visual_ssl ainsi
import torch
from x_clip import CLIP
from x_clip . visual_ssl import SimSiam
from vit_pytorch import ViT
from vit_pytorch . extractor import Extractor
base_vit = ViT (
image_size = 256 ,
patch_size = 32 ,
num_classes = 1000 ,
dim = 512 ,
depth = 6 ,
heads = 16 ,
mlp_dim = 2048 ,
dropout = 0.1 ,
emb_dropout = 0.1
)
image_encoder = Extractor (
base_vit ,
return_embeddings_only = True
)
visual_ssl = SimSiam ( # SimSiam defined externally - needs to be a module that accepts an image of the same dimensions as CLIP and returns a scalar loss
image_encoder ,
image_size = 256 ,
hidden_layer = - 1
)
clip = CLIP (
image_encoder = image_encoder ,
dim_image = 512 ,
dim_text = 512 ,
dim_latent = 512 ,
use_mlm = True ,
visual_ssl = visual_ssl , # SSL module passed into CLIP
use_all_token_embeds = False ,
extra_latent_projection = False ,
mlm_random_token_prob = 0.1
)
text = torch . randint ( 0 , 10000 , ( 4 , 256 ))
images = torch . randn ( 4 , 3 , 256 , 256 )
loss = clip ( text , images , return_loss = True )
loss . backward () @misc { radford2021learning ,
title = { Learning Transferable Visual Models From Natural Language Supervision } ,
author = { Alec Radford and Jong Wook Kim and Chris Hallacy and Aditya Ramesh and Gabriel Goh and Sandhini Agarwal and Girish Sastry and Amanda Askell and Pamela Mishkin and Jack Clark and Gretchen Krueger and Ilya Sutskever } ,
year = { 2021 } ,
eprint = { 2103.00020 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.CV }
} @misc { yao2021filip ,
title = { FILIP: Fine-grained Interactive Language-Image Pre-Training } ,
author = { Lewei Yao and Runhui Huang and Lu Hou and Guansong Lu and Minzhe Niu and Hang Xu and Xiaodan Liang and Zhenguo Li and Xin Jiang and Chunjing Xu } ,
year = { 2021 } ,
eprint = { 2111.07783 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.CV }
} @misc { fürst2021cloob ,
title = { CLOOB: Modern Hopfield Networks with InfoLOOB Outperform CLIP } ,
author = { Andreas Fürst and Elisabeth Rumetshofer and Viet Tran and Hubert Ramsauer and Fei Tang and Johannes Lehner and David Kreil and Michael Kopp and Günter Klambauer and Angela Bitto-Nemling and Sepp Hochreiter } ,
year = { 2021 } ,
eprint = { 2110.11316 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.LG }
} @misc { yeh2021decoupled ,
title = { Decoupled Contrastive Learning } ,
author = { Chun-Hsiao Yeh and Cheng-Yao Hong and Yen-Chi Hsu and Tyng-Luh Liu and Yubei Chen and Yann LeCun } ,
year = { 2021 } ,
eprint = { 2110.06848 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.LG }
} @misc { zhai2021lit ,
title = { LiT: Zero-Shot Transfer with Locked-image Text Tuning } ,
author = { Xiaohua Zhai and Xiao Wang and Basil Mustafa and Andreas Steiner and Daniel Keysers and Alexander Kolesnikov and Lucas Beyer } ,
year = { 2021 } ,
eprint = { 2111.07991 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.CV }
} @misc { li2021supervision ,
title = { Supervision Exists Everywhere: A Data Efficient Contrastive Language-Image Pre-training Paradigm } ,
author = { Yangguang Li and Feng Liang and Lichen Zhao and Yufeng Cui and Wanli Ouyang and Jing Shao and Fengwei Yu and Junjie Yan } ,
year = { 2021 } ,
eprint = { 2110.05208 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.CV }
} @Article { mu2021slip ,
author = { Norman Mu and Alexander Kirillov and David Wagner and Saining Xie } ,
title = { SLIP: Self-supervision meets Language-Image Pre-training } ,
journal = { arXiv preprint arXiv:2112.12750 } ,
year = { 2021 } ,
} @misc { su2021roformer ,
title = { RoFormer: Enhanced Transformer with Rotary Position Embedding } ,
author = { Jianlin Su and Yu Lu and Shengfeng Pan and Bo Wen and Yunfeng Liu } ,
year = { 2021 } ,
eprint = { 2104.09864 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.CL }
} @inproceedings { anonymous2022normformer ,
title = { NormFormer: Improved Transformer Pretraining with Extra Normalization } ,
author = { Anonymous } ,
booktitle = { Submitted to The Tenth International Conference on Learning Representations } ,
year = { 2022 } ,
url = { https://openreview.net/forum?id=GMYWzWztDx5 } ,
note = { under review }
} @inproceedings { Li2022ScalingLP ,
title = { Scaling Language-Image Pre-training via Masking } ,
author = { Yanghao Li and Haoqi Fan and Ronghang Hu and Christoph Feichtenhofer and Kaiming He } ,
year = { 2022 }
} @article { Liu2022PatchDropoutEV ,
title = { PatchDropout: Economizing Vision Transformers Using Patch Dropout } ,
author = { Yue Liu and Christos Matsoukas and Fredrik Strand and Hossein Azizpour and Kevin Smith } ,
journal = { ArXiv } ,
year = { 2022 } ,
volume = { abs/2208.07220 }
} @misc { shi2023enhance ,
title = { Enhance audio generation controllability through representation similarity regularization } ,
author = { Yangyang Shi and Gael Le Lan and Varun Nagaraja and Zhaoheng Ni and Xinhao Mei and Ernie Chang and Forrest Iandola and Yang Liu and Vikas Chandra } ,
year = { 2023 } ,
eprint = { 2309.08773 } ,
archivePrefix = { arXiv } ,
primaryClass = { cs.SD }
}
