mirror of
https://github.com/unanmed/ginka-generator.git
synced 2026-05-14 04:41:12 +08:00
299 lines
10 KiB
Python
299 lines
10 KiB
Python
import argparse
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import math
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import os
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import sys
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from datetime import datetime
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import numpy as np
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import torch
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import torch.nn.functional as F
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import torch.optim as optim
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from torch.utils.data import DataLoader
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from tqdm import tqdm
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from .dataset import GinkaJointDataset
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from .heatmap.diffusion import Diffusion
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from .heatmap.model import GinkaHeatmapModel
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from .maskGIT.model import GinkaMaskGIT
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BATCH_SIZE = 64
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VAL_BATCH_DIVIDER = 64
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NUM_CLASSES = 16
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MASK_TOKEN = 15
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GENERATE_STEP = 8
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MAP_W = 13
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MAP_H = 13
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HEATMAP_CHANNEL = 9
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LABEL_SMOOTHING = 0
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NUM_LAYERS = 4
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D_MODEL = 192
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NUM_LAYERS_DIFFUSION = 4
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D_MODEL_DIFFUSION = 128
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T_DIFFUSION = 100
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MIN_MASK = 0
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MAX_MASK = 1
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CE_WEIGHT = 0.5
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DROP_RATE = 0.2
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device = torch.device(
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"cuda:1" if torch.cuda.is_available()
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else "mps" if torch.mps.is_available()
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else "cpu"
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)
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os.makedirs("result", exist_ok=True)
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os.makedirs("result/joint", exist_ok=True)
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disable_tqdm = not sys.stdout.isatty()
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def parse_arguments():
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parser = argparse.ArgumentParser(description="joint training codes")
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parser.add_argument("--resume", type=bool, default=False)
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parser.add_argument("--state_heatmap", type=str, default="result/ginka_heatmap.pth")
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parser.add_argument("--train", type=str, default="ginka-dataset.json")
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parser.add_argument("--validate", type=str, default="ginka-eval.json")
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parser.add_argument("--epochs", type=int, default=50)
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parser.add_argument("--checkpoint", type=int, default=5)
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parser.add_argument("--load_optim", type=bool, default=True)
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parser.add_argument("--maskgit_path", type=str, default="result/ginka_transformer.pth")
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args = parser.parse_args()
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return args
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def load_heatmap_checkpoint(model, optimizer, args):
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if not args.state_heatmap:
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return
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if not os.path.exists(args.state_heatmap):
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raise FileNotFoundError(f"Heatmap checkpoint not found: {args.state_heatmap}")
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checkpoint = torch.load(args.state_heatmap, map_location=device)
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model.load_state_dict(checkpoint["model_state"], strict=False)
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if args.resume and args.load_optim and checkpoint.get("optim_state") is not None:
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optimizer.load_state_dict(checkpoint["optim_state"])
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print("Loaded Diffusion model state.")
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def freeze_module(module: torch.nn.Module):
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module.eval()
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for parameter in module.parameters():
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parameter.requires_grad = False
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def predict_x0(diffusion: Diffusion, x_t: torch.Tensor, pred_noise: torch.Tensor, t: torch.Tensor):
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sqrt_ab = diffusion.sqrt_ab[t][:, None, None, None]
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sqrt_one_minus_ab = diffusion.sqrt_one_minus_ab[t][:, None, None, None]
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x0 = (x_t - sqrt_one_minus_ab * pred_noise) / sqrt_ab
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return torch.clamp(x0, 0.0, 1.0)
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def maskgit_joint_loss(maskgit, generated_heatmap: torch.Tensor, target_map: torch.Tensor):
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batch_size, height, width = target_map.shape
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target_tokens = target_map.view(batch_size, height * width)
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canvas = torch.full_like(target_tokens, MASK_TOKEN)
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losses = []
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for step in range(GENERATE_STEP):
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current_mask = canvas == MASK_TOKEN
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if current_mask.sum().item() == 0:
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break
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logits = maskgit(canvas, generated_heatmap)
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ce = F.cross_entropy(
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logits.permute(0, 2, 1),
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target_tokens,
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reduction='none',
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label_smoothing=LABEL_SMOOTHING
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)
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ce = (ce * current_mask).sum() / (current_mask.sum() + 1e-6)
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losses.append(ce)
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with torch.no_grad():
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probs = F.softmax(logits, dim=-1)
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sampled_tiles = torch.argmax(probs, dim=-1)
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confidences = torch.gather(probs, -1, sampled_tiles.unsqueeze(-1)).squeeze(-1)
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ratio = math.cos(((step + 1) / GENERATE_STEP) * math.pi / 2)
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num_to_mask = math.floor(ratio * target_tokens.shape[1])
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if num_to_mask > 0:
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_, mask_indices = torch.topk(confidences, k=num_to_mask, largest=False)
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sampled_tiles = sampled_tiles.scatter(1, mask_indices, MASK_TOKEN)
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canvas = sampled_tiles
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if not losses:
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return torch.zeros((), device=generated_heatmap.device)
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return torch.stack(losses).mean()
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def validate(model, maskgit, diffusion, dataloader, ce_weight):
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model.eval()
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total_loss = 0.0
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total_diffusion_loss = 0.0
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total_maskgit_loss = 0.0
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with torch.no_grad():
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for batch in tqdm(dataloader, desc="Validating", leave=False, disable=disable_tqdm):
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cond_heatmap = batch["cond_heatmap"].to(device)
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target_heatmap = batch["target_heatmap"].to(device)
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target_map = batch["target_map"].to(device)
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batch_size = target_heatmap.shape[0]
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t = torch.randint(1, T_DIFFUSION, [batch_size], device=device)
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noise = torch.randn_like(target_heatmap)
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x_t = diffusion.q_sample(target_heatmap, t, noise)
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pred_noise = model(x_t, cond_heatmap, t)
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diffusion_loss = F.mse_loss(pred_noise, noise)
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generated_heatmap = predict_x0(diffusion, x_t, pred_noise, t)
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maskgit_loss = maskgit_joint_loss(maskgit, generated_heatmap, target_map)
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loss = diffusion_loss + ce_weight * maskgit_loss
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total_loss += loss.item()
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total_diffusion_loss += diffusion_loss.item()
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total_maskgit_loss += maskgit_loss.item()
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size = max(len(dataloader), 1)
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return {
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"loss": total_loss / size,
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"diffusion_loss": total_diffusion_loss / size,
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"maskgit_loss": total_maskgit_loss / size,
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}
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def train():
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print(f"Using {device.type} to train model.")
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args = parse_arguments()
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maskgit = GinkaMaskGIT(
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num_classes=NUM_CLASSES,
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heatmap_channel=HEATMAP_CHANNEL,
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num_layers=NUM_LAYERS,
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d_model=D_MODEL,
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).to(device)
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if not os.path.exists(args.maskgit_path):
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raise FileNotFoundError(f"MaskGIT checkpoint not found: {args.maskgit_path}")
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maskgit_state = torch.load(args.maskgit_path, map_location=device)
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maskgit.load_state_dict(maskgit_state["model_state"])
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freeze_module(maskgit)
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print("Loaded and froze MaskGIT model state.")
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model = GinkaHeatmapModel(
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T=T_DIFFUSION,
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heatmap_dim=HEATMAP_CHANNEL,
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d_model=D_MODEL_DIFFUSION,
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num_layers=NUM_LAYERS_DIFFUSION,
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).to(device)
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diffusion = Diffusion(device, T=T_DIFFUSION)
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dataset = GinkaJointDataset(args.train, min_mask=MIN_MASK, max_mask=MAX_MASK)
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dataset_val = GinkaJointDataset(args.validate, min_mask=MIN_MASK, max_mask=MAX_MASK)
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dataloader = DataLoader(dataset, batch_size=BATCH_SIZE, shuffle=True)
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dataloader_val = DataLoader(
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dataset_val,
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batch_size=max(1, BATCH_SIZE // VAL_BATCH_DIVIDER),
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shuffle=True,
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)
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optimizer = optim.AdamW(model.parameters(), lr=1e-4, weight_decay=1e-2)
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scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(
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optimizer,
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T_max=args.epochs,
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eta_min=1e-6,
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)
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load_heatmap_checkpoint(model, optimizer, args)
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for epoch in tqdm(range(args.epochs), desc="Joint Training", disable=disable_tqdm):
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model.train()
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epoch_loss = 0.0
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epoch_diffusion_loss = 0.0
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epoch_maskgit_loss = 0.0
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for batch in tqdm(dataloader, leave=False, desc="Epoch Progress", disable=disable_tqdm):
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cond_heatmap = batch["cond_heatmap"].to(device)
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target_heatmap = batch["target_heatmap"].to(device)
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target_map = batch["target_map"].to(device)
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batch_size = target_heatmap.shape[0]
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optimizer.zero_grad()
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t = torch.randint(1, T_DIFFUSION, [batch_size], device=device)
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noise = torch.randn_like(target_heatmap)
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x_t = diffusion.q_sample(target_heatmap, t, noise)
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cond_for_diffusion = cond_heatmap
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use_unconditional_branch = False
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if np.random.rand() < DROP_RATE:
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cond_for_diffusion = torch.zeros_like(cond_heatmap)
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use_unconditional_branch = True
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pred_noise = model(x_t, cond_for_diffusion, t)
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diffusion_loss = F.mse_loss(pred_noise, noise)
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pred_noise_for_joint = pred_noise
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if use_unconditional_branch:
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pred_noise_for_joint = model(x_t, cond_heatmap, t)
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generated_heatmap = predict_x0(diffusion, x_t, pred_noise_for_joint, t)
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maskgit_loss = maskgit_joint_loss(maskgit, generated_heatmap, target_map)
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loss = diffusion_loss + CE_WEIGHT * maskgit_loss
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loss.backward()
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optimizer.step()
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epoch_loss += loss.item()
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epoch_diffusion_loss += diffusion_loss.item()
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epoch_maskgit_loss += maskgit_loss.item()
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scheduler.step()
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train_size = max(len(dataloader), 1)
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tqdm.write(
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f"[Epoch {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}] "
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f"E: {epoch + 1} | "
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f"Loss: {epoch_loss / train_size:.6f} | "
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f"Diffusion: {epoch_diffusion_loss / train_size:.6f} | "
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f"MaskGIT: {epoch_maskgit_loss / train_size:.6f} | "
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f"LR: {scheduler.get_last_lr()[0]:.6f}"
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)
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if (epoch + 1) % args.checkpoint == 0:
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checkpoint_path = f"result/joint/ginka-joint-{epoch + 1}.pth"
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torch.save(
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{
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"model_state": model.state_dict(),
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"optim_state": optimizer.state_dict(),
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},
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checkpoint_path,
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)
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metrics = validate(model, maskgit, diffusion, dataloader_val, CE_WEIGHT)
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tqdm.write(
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f"[Validate {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}] "
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f"E: {epoch + 1} | "
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f"Loss: {metrics['loss']:.6f} | "
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f"Diffusion: {metrics['diffusion_loss']:.6f} | "
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f"MaskGIT: {metrics['maskgit_loss']:.6f}"
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)
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print("Train ended.")
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torch.save(
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{
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"model_state": model.state_dict(),
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"optim_state": optimizer.state_dict(),
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},
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"result/ginka_joint_heatmap.pth",
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)
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if __name__ == "__main__":
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torch.set_num_threads(4)
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train() |