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Migrate to text-conditioned prior training (#95)

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* migrate to conditioned prior

* unify reader logic with a wrapper (#1)

* separate out reader logic

* support both training methods

* Update train prior to use embedding wrapper (#3)

* Support Both Methods

* bug fixes

* small bug fixes

* embedding only wrapper bug

* use smaller val perc

* final bug fix for embedding-only

Co-authored-by: nousr <>
This commit is contained in:
zion
2022-05-15 20:16:38 -07:00
committed by GitHub
parent ecf9e8027d
commit 4a59dea4cf
3 changed files with 304 additions and 96 deletions
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1
dalle2_pytorch/dataloaders/__init__.py
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@@ -1 +1,2 @@
from dalle2_pytorch.dataloaders.decoder_loader import ImageEmbeddingDataset, create_image_embedding_dataloader
from dalle2_pytorch.dataloaders.embedding_wrapper import make_splits

180
dalle2_pytorch/dataloaders/embedding_wrapper.py Normal file
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@@ -0,0 +1,180 @@
from torch.utils.data import IterableDataset
from torch import from_numpy
from clip import tokenize
from embedding_reader import EmbeddingReader
class PriorEmbeddingLoader(IterableDataset):
def __init__(
self,
text_conditioned: bool,
batch_size: int,
start: int,
stop: int,
image_reader,
text_reader: EmbeddingReader = None,
device: str = "cpu",
) -> None:
super(PriorEmbeddingLoader).__init__()
self.text_conditioned = text_conditioned
if not self.text_conditioned:
self.text_reader = text_reader
self.image_reader = image_reader
self.batch_size = batch_size
self.start = start
self.stop = stop
self.device = device
def __iter__(self):
self.n = 0
loader_args = dict(
batch_size=self.batch_size,
start=self.start,
end=self.stop,
show_progress=False,
)
if self.text_conditioned:
self.loader = self.image_reader(**loader_args)
else:
self.loader = zip(
self.image_reader(**loader_args), self.text_reader(**loader_args)
)
return self
def __next__(self):
try:
return self.get_sample()
except StopIteration:
raise StopIteration
def get_sample(self):
"""
pre-proocess data from either reader into a common format
"""
self.n += 1
if self.text_conditioned:
image_embedding, caption = next(self.loader)
image_embedding = from_numpy(image_embedding).to(self.device)
tokenized_caption = tokenize(
caption["caption"].to_list(), truncate=True
).to(self.device)
return image_embedding, tokenized_caption
else:
(image_embedding, _), (text_embedding, _) = next(self.loader)
image_embedding = from_numpy(image_embedding).to(self.device)
text_embedding = from_numpy(text_embedding).to(self.device)
return image_embedding, text_embedding
def make_splits(
text_conditioned: bool,
batch_size: int,
num_data_points: int,
train_split: float,
eval_split: float,
device: str,
img_url: str,
meta_url: str = None,
txt_url: str = None,
):
assert img_url is not None, "Must supply some image embeddings"
if text_conditioned:
assert meta_url is not None, "Must supply metadata url if text-conditioning"
image_reader = EmbeddingReader(
embeddings_folder=img_url,
file_format="parquet_npy",
meta_columns=["caption"],
metadata_folder=meta_url,
)
# compute split points
if num_data_points > image_reader.count:
print("Specified point count is larger than the number of points available...defaulting to max length of reader.")
num_data_points = image_reader.count
train_set_size = int(train_split * num_data_points)
eval_set_size = int(eval_split * num_data_points)
eval_stop = int(train_set_size + eval_set_size)
train_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
batch_size=batch_size,
start=0,
stop=train_set_size,
device=device,
)
eval_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
batch_size=batch_size,
start=train_set_size,
stop=eval_stop,
device=device,
)
test_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
batch_size=batch_size,
start=eval_stop,
stop=int(num_data_points),
device=device,
)
else:
assert (
txt_url is not None
), "Must supply text embedding url if not text-conditioning"
image_reader = EmbeddingReader(img_url, file_format="npy")
text_reader = EmbeddingReader(txt_url, file_format="npy")
# compute split points
if num_data_points > image_reader.count:
print("Specified point count is larger than the number of points available...defaulting to max length of reader.")
num_data_points = image_reader.count
train_set_size = int(train_split * num_data_points)
eval_set_size = int(eval_split * num_data_points)
eval_stop = int(train_set_size + eval_set_size)
train_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
text_reader=text_reader,
batch_size=batch_size,
start=0,
stop=train_set_size,
device=device,
)
eval_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
text_reader=text_reader,
batch_size=batch_size,
start=train_set_size,
stop=eval_stop,
device=device,
)
test_loader = PriorEmbeddingLoader(
text_conditioned=text_conditioned,
image_reader=image_reader,
text_reader=text_reader,
batch_size=batch_size,
start=eval_stop,
stop=int(num_data_points),
device=device,
)
return train_loader, eval_loader, test_loader

181
train_diffusion_prior.py
View File

@@ -5,9 +5,10 @@ import time
import numpy as np
import torch
import clip
from torch import nn
from dalle2_pytorch import DiffusionPrior, DiffusionPriorNetwork
from dalle2_pytorch.dataloaders import make_splits
from dalle2_pytorch import DiffusionPrior, DiffusionPriorNetwork, OpenAIClipAdapter
from dalle2_pytorch.train import DiffusionPriorTrainer, load_diffusion_model, save_diffusion_model, print_ribbon
from dalle2_pytorch.trackers import ConsoleTracker, WandbTracker
@@ -17,8 +18,7 @@ from tqdm import tqdm
# constants
NUM_TEST_EMBEDDINGS = 100 # for cosine similarity reporting during training
REPORT_METRICS_EVERY = 100 # for cosine similarity and other metric reporting during training
REPORT_METRICS_EVERY = 250 # for cosine similarity and other metric reporting during training
tracker = WandbTracker()
@@ -36,66 +36,90 @@ class Timer:
def elapsed(self):
return time.time() - self.last_time
# functions
def eval_model(model,device,image_reader,text_reader,start,end,batch_size,loss_type,phase="Validation"):
def eval_model(model, dataloader, text_conditioned, loss_type, phase="Validation"):
model.eval()
with torch.no_grad():
total_loss = 0.
total_samples = 0.
for emb_images, emb_text in zip(image_reader(batch_size=batch_size, start=start, end=end),
text_reader(batch_size=batch_size, start=start, end=end)):
for image_embeddings, text_data in tqdm(dataloader):
emb_images_tensor = torch.tensor(emb_images[0]).to(device)
emb_text_tensor = torch.tensor(emb_text[0]).to(device)
batches = image_embeddings.shape[0]
batches = emb_images_tensor.shape[0]
input_args = dict(image_embed=image_embeddings)
if text_conditioned:
input_args = dict(**input_args, text = text_data)
else:
input_args = dict(**input_args, text_embed=text_data)
loss = model(text_embed = emb_text_tensor, image_embed = emb_images_tensor)
loss = model(**input_args)
total_loss += loss.item() * batches
total_loss += loss * batches
total_samples += batches
avg_loss = (total_loss / total_samples)
tracker.log({f'{phase} {loss_type}': avg_loss})
def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,NUM_TEST_EMBEDDINGS,device):
def report_cosine_sims(diffusion_prior, dataloader, text_conditioned):
diffusion_prior.eval()
cos = nn.CosineSimilarity(dim=1, eps=1e-6)
tstart = train_set_size
tend = train_set_size+NUM_TEST_EMBEDDINGS
for test_image_embeddings, text_data in tqdm(dataloader):
# we are text conditioned, we produce an embedding from the tokenized text
if text_conditioned:
text_embedding, text_encodings, text_mask = diffusion_prior.clip.embed_text(
text_data)
text_cond = dict(text_embed=text_embedding,
text_encodings=text_encodings, mask=text_mask)
else:
text_embedding = text_data
text_cond = dict(text_embed=text_embedding)
for embt, embi in zip(text_reader(batch_size=NUM_TEST_EMBEDDINGS, start=tstart, end=tend),
image_reader(batch_size=NUM_TEST_EMBEDDINGS, start=tstart, end=tend)):
# make a copy of the text embeddings for shuffling
text_embed = torch.tensor(embt[0]).to(device)
text_embed_shuffled = text_embed.clone()
# roll the text embeddings to simulate "unrelated" captions
rolled_idx = torch.roll(torch.arange(NUM_TEST_EMBEDDINGS), 1)
text_embed_shuffled = text_embedding.clone()
# roll the text to simulate "unrelated" captions
rolled_idx = torch.roll(torch.arange(text_embedding.shape[0]), 1)
text_embed_shuffled = text_embed_shuffled[rolled_idx]
text_embed_shuffled = text_embed_shuffled / \
text_embed_shuffled.norm(dim=1, keepdim=True)
test_text_shuffled_cond = dict(text_embed=text_embed_shuffled)
if text_conditioned:
text_encodings_shuffled = text_encodings[rolled_idx]
text_mask_shuffled = text_mask[rolled_idx]
else:
text_encodings_shuffled = None
text_mask_shuffled = None
text_cond_shuffled = dict(text_embed=text_embed_shuffled,
text_encodings=text_encodings_shuffled, mask=text_mask_shuffled)
# prepare the text embedding
text_embed = text_embed / text_embed.norm(dim=1, keepdim=True)
test_text_cond = dict(text_embed=text_embed)
text_embed = text_embedding / text_embedding.norm(dim=1, keepdim=True)
# prepare image embeddings
test_image_embeddings = torch.tensor(embi[0]).to(device)
test_image_embeddings = test_image_embeddings / \
test_image_embeddings.norm(dim=1, keepdim=True)
# predict on the unshuffled text embeddings
predicted_image_embeddings = diffusion_prior.p_sample_loop(
(NUM_TEST_EMBEDDINGS, 768), text_cond=test_text_cond)
test_image_embeddings.shape, text_cond)
predicted_image_embeddings = predicted_image_embeddings / \
predicted_image_embeddings.norm(dim=1, keepdim=True)
# predict on the shuffled embeddings
predicted_unrelated_embeddings = diffusion_prior.p_sample_loop(
(NUM_TEST_EMBEDDINGS, 768), text_cond=test_text_shuffled_cond)
test_image_embeddings.shape, text_cond_shuffled)
predicted_unrelated_embeddings = predicted_unrelated_embeddings / \
predicted_unrelated_embeddings.norm(dim=1, keepdim=True)
# calculate similarities
original_similarity = cos(
text_embed, test_image_embeddings).cpu().numpy()
@@ -111,6 +135,7 @@ def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,N
"CosineSimilarity(text_embed,predicted_unrelated_embed)": np.mean(unrelated_similarity),
"Cosine similarity difference":np.mean(predicted_similarity - original_similarity)})
@click.command()
@click.option("--wandb-entity", default="laion")
@click.option("--wandb-project", default="diffusion-prior")
@@ -118,29 +143,32 @@ def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,N
@click.option("--wandb-arch", default="DiffusionPrior")
@click.option("--image-embed-url", default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/img_emb/")
@click.option("--text-embed-url", default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/text_emb/")
@click.option("--meta-url", default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/laion2B-en-metadata/")
@click.option("--learning-rate", default=1.1e-4)
@click.option("--weight-decay", default=6.02e-2)
@click.option("--dropout", default=5e-2)
@click.option("--max-grad-norm", default=0.5)
@click.option("--batch-size", default=10**4)
@click.option("--num-data-points", default=250e6)
@click.option("--batch-size", default=320)
@click.option("--num-epochs", default=5)
@click.option("--image-embed-dim", default=768)
@click.option("--train-percent", default=0.7)
@click.option("--val-percent", default=0.2)
@click.option("--test-percent", default=0.1)
@click.option("--dpn-depth", default=6)
@click.option("--train-percent", default=0.9)
@click.option("--val-percent", default=1e-7)
@click.option("--test-percent", default=0.0999999)
@click.option("--dpn-depth", default=12)
@click.option("--dpn-dim-head", default=64)
@click.option("--dpn-heads", default=8)
@click.option("--dp-condition-on-text-encodings", default=False)
@click.option("--dp-timesteps", default=100)
@click.option("--dp-normformer", default=False)
@click.option("--dpn-heads", default=12)
@click.option("--dp-condition-on-text-encodings", default=True)
@click.option("--dp-timesteps", default=1000)
@click.option("--dp-normformer", default=True)
@click.option("--dp-cond-drop-prob", default=0.1)
@click.option("--dp-loss-type", default="l2")
@click.option("--clip", default=None)
@click.option("--clip", default="ViT-L/14")
@click.option("--amp", default=False)
@click.option("--save-interval", default=30)
@click.option("--save-interval", default=120)
@click.option("--save-path", default="./diffusion_prior_checkpoints")
@click.option("--pretrained-model-path", default=None)
@click.option("--gpu-device", default=0)
def train(
wandb_entity,
wandb_project,
@@ -148,10 +176,12 @@ def train(
wandb_arch,
image_embed_url,
text_embed_url,
meta_url,
learning_rate,
weight_decay,
dropout,
max_grad_norm,
num_data_points,
batch_size,
num_epochs,
image_embed_dim,
@@ -170,7 +200,8 @@ def train(
amp,
save_interval,
save_path,
pretrained_model_path
pretrained_model_path,
gpu_device
):
config = {
"learning_rate": learning_rate,
@@ -197,7 +228,7 @@ def train(
# Check if DPRIOR_PATH exists(saved model path)
DPRIOR_PATH = args.pretrained_model_path
DPRIOR_PATH = pretrained_model_path
RESUME = exists(DPRIOR_PATH)
if not RESUME:
@@ -211,7 +242,7 @@ def train(
has_cuda = torch.cuda.is_available()
if has_cuda:
device = torch.device("cuda:0")
device = torch.device(f"cuda:{gpu_device}")
torch.cuda.set_device(device)
# Training loop
@@ -227,11 +258,17 @@ def train(
normformer = dp_normformer
)
# Load clip model if text-conditioning
if dp_condition_on_text_encodings:
clip_adapter = OpenAIClipAdapter(clip)
else:
clip_adapter = None
# diffusion prior with text embeddings and image embeddings pre-computed
diffusion_prior = DiffusionPrior(
net = prior_network,
clip = clip,
clip = clip_adapter,
image_embed_dim = image_embed_dim,
timesteps = dp_timesteps,
cond_drop_prob = dp_cond_drop_prob,
@@ -265,33 +302,37 @@ def train(
Path(save_path).mkdir(exist_ok = True, parents = True)
# Get image and text embeddings from the servers
# Utilize wrapper to abstract away loader logic
print_ribbon("Downloading Embeddings")
loader_args = dict(text_conditioned=dp_condition_on_text_encodings, batch_size=batch_size, num_data_points=num_data_points,
train_split=train_percent, eval_split=val_percent, device=device, img_url=image_embed_url)
print_ribbon("Downloading embeddings - image and text")
image_reader = EmbeddingReader(embeddings_folder=image_embed_url, file_format="npy")
text_reader = EmbeddingReader(embeddings_folder=text_embed_url, file_format="npy")
num_data_points = text_reader.count
if dp_condition_on_text_encodings:
loader_args = dict(**loader_args, meta_url=meta_url)
else:
loader_args = dict(**loader_args, txt_url=text_embed_url)
train_loader, eval_loader, test_loader = make_splits(**loader_args)
### Training code ###
step = 1
timer = Timer()
epochs = num_epochs
train_set_size = int(train_percent*num_data_points)
val_set_size = int(val_percent*num_data_points)
eval_start = train_set_size
for _ in range(epochs):
for emb_images,emb_text in zip(image_reader(batch_size=batch_size, start=0, end=train_set_size),
text_reader(batch_size=batch_size, start=0, end=train_set_size)):
for image, text in tqdm(train_loader):
trainer.train()
diffusion_prior.train()
emb_images_tensor = torch.tensor(emb_images[0]).to(device)
emb_text_tensor = torch.tensor(emb_text[0]).to(device)
input_args = dict(image_embed=image)
if dp_condition_on_text_encodings:
input_args = dict(**input_args, text = text)
else:
input_args = dict(**input_args, text_embed=text)
loss = trainer(text_embed = emb_text_tensor, image_embed = emb_images_tensor)
loss = trainer(**input_args)
# Samples per second
@@ -310,37 +351,23 @@ def train(
image_embed_dim)
# Log to wandb
tracker.log({"Training loss": loss.item(),
tracker.log({"Training loss": loss,
"Steps": step,
"Samples per second": samples_per_sec})
# Log cosineSim(text_embed,predicted_image_embed) - cosineSim(text_embed,image_embed)
# Use NUM_TEST_EMBEDDINGS samples from the test set each time
# Get embeddings from the most recently saved model
if(step % REPORT_METRICS_EVERY) == 0:
report_cosine_sims(diffusion_prior,
image_reader,
text_reader,
train_set_size,
NUM_TEST_EMBEDDINGS,
device)
report_cosine_sims(diffusion_prior, eval_loader, dp_condition_on_text_encodings)
### Evaluate model(validation run) ###
eval_model(diffusion_prior,
device,
image_reader,
text_reader,
eval_start,
eval_start+NUM_TEST_EMBEDDINGS,
NUM_TEST_EMBEDDINGS,
dp_loss_type,
phase="Validation")
eval_model(diffusion_prior, eval_loader, dp_condition_on_text_encodings, dp_loss_type, phase="Validation")
step += 1
trainer.update()
### Test run ###
test_set_size = int(test_percent*train_set_size)
start = train_set_size+val_set_size
end = num_data_points
eval_model(diffusion_prior,device,image_reader,text_reader,start,end,batch_size,dp_loss_type,phase="Test")
eval_model(diffusion_prior, test_loader, dp_condition_on_text_encodings, dp_loss_type, phase="Test")
if __name__ == "__main__":
train()