src/aiunn/finetune.py

@@ -99,6 +99,8 @@ class ImageDataset(Dataset):
             if 'high_res_stream' in locals():
                 high_res_stream.close()
 
+
+
 class FineTuner:
     def __init__(self,
                  model: AIIA,
@@ -127,7 +129,7 @@ class FineTuner:
         self.learning_rate = learning_rate
         self.train_ratio = train_ratio
         self.model = model
-        self.output_dir = output_dir
+        self.ouptut_dir = output_dir
         
         # Create output directory if it doesn't exist
         os.makedirs(output_dir, exist_ok=True)
@@ -150,6 +152,17 @@ class FineTuner:
         # Initialize training parameters
         self._initialize_training()
 
+    def _freeze_layers(self):
+        """Freeze all layers except the upsample layer"""
+        try:
+            # Try to freeze layers based on their names
+            for name, param in self.model.named_parameters():
+                if 'upsample' not in name:
+                    param.requires_grad = False
+        except Exception as e:
+            print(f"Warning: Couldn't freeze layers - {str(e)}")
+            pass
+
     def _initialize_datasets(self):
         """
         Helper method to initialize datasets
@@ -159,15 +172,18 @@ class FineTuner:
         else:
             raise ValueError("Invalid dataset_paths format. Must be a list.")
 
+        # Split into train and validation sets
         df_train, df_val = train_test_split(
             df_train,
             test_size=1 - self.train_ratio,
             random_state=42
         )
 
-        # Define preprocessing transforms
+        # Define preprocessing transforms with augmentation
         self.transform = transforms.Compose([
             transforms.ToTensor(),
+            transforms.RandomResizedCrop(256),
+            transforms.RandomHorizontalFlip(),
             transforms.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5])
         ])
 
@@ -201,46 +217,66 @@ class FineTuner:
         with open(self.log_file, 'a') as f:
             f.write(f'{epoch},{train_loss:.6f},{val_loss:.6f},{self.best_val_loss:.6f}\n')
     
-
     def _initialize_training(self):
         """
         Helper method to initialize training parameters
         """
-        # Freeze CNN layers (if applicable)
-        try:
-            for param in self.model.cnn.parameters():
-                param.requires_grad = False
-        except AttributeError:
-            pass  # If model doesn't have a 'cnn' attribute, just continue
+        # Freeze all layers except upsample layer
+        self._freeze_layers()
 
         # Add upscaling layer if not already present
         if not hasattr(self.model, 'upsample'):
-            # Get existing configuration values or set defaults if necessary
-            hidden_size = self.model.config.hidden_size
-            kernel_size = self.model.config.kernel_size
+            # Try to get existing configuration or set defaults
+            try:
+                hidden_size = self.model.config.hidden_size
+                kernel_size = 3  # Use odd-sized kernel for better performance
+            except AttributeError:
+                # Fallback values if config isn't available
+                hidden_size = 512
+                kernel_size = 3
 
             self.model.upsample = nn.Sequential(
-                nn.Upsample(scale_factor=2, mode='bilinear', align_corners=False),
-                nn.Conv2d(hidden_size, 3, kernel_size=kernel_size, padding=1)
+                nn.ConvTranspose2d(hidden_size, 
+                                   hidden_size//2,
+                                   kernel_size=kernel_size,
+                                   stride=2,
+                                   padding=1,
+                                   output_padding=1),
+                nn.ReLU(inplace=True),
+                nn.ConvTranspose2d(hidden_size//2,
+                                   3,
+                                   kernel_size=kernel_size,
+                                   stride=2,
+                                   padding=1,
+                                   output_padding=1)
             )
-            # Update the model's configuration with new parameters
             self.model.config.upsample_hidden_size = hidden_size
             self.model.config.upsample_kernel_size = kernel_size
 
-        # Initialize optimizer and loss function
-        self.criterion = nn.MSELoss()
+        # Initialize optimizer and scheduler
+        params_to_optimize = [p for p in self.model.parameters() if p.requires_grad]
         
-        # Get parameters of the upsample layer for training
-        params = [p for p in self.model.upsample.parameters() if p.requires_grad]
-        if not params:
-            raise ValueError("No parameters found in upsample layer to optimize")
+        if not params_to_optimize:
+            raise ValueError("No parameters found to optimize")
 
+        # Use Adam with weight decay for better regularization
         self.optimizer = torch.optim.Adam(
-            params,
-            lr=self.learning_rate
+            params_to_optimize,
+            lr=self.learning_rate,
+            weight_decay=1e-4  # Add L2 regularization
         )
 
-        self.best_val_loss = float('inf')
+        # Reduce learning rate when validation loss plateaus
+        self.scheduler = torch.optim.lr_scheduler.ReduceLROnPlateau(
+            self.optimizer,
+            factor=0.1,       # Multiply LR by this factor on plateau
+            patience=3,      # Number of epochs to wait before reducing LR
+            verbose=True
+        )
+
+        # Use a combination of L1 and L2 losses for better performance
+        self.criterion = nn.L1Loss()
+        self.mse_criterion = nn.MSELoss()
 
     def _train_epoch(self):
         """
@@ -255,18 +291,26 @@ class FineTuner:
             low_ress = batch['low_ress'].to(self.device)
             high_ress = batch['high_ress'].to(self.device)
 
-            # Forward pass
-            features = self.model.cnn(low_ress) if hasattr(self.model, 'cnn') else self.model.extract_features(low_ress)
+            try:
+                # Try using CNN layer if available
+                features = self.model.cnn(low_ress)
+            except AttributeError:
+                # Fallback to extract_features method
+                features = self.model.extract_features(low_ress)
+
             outputs = self.model.upsample(features)
 
-            loss = self.criterion(outputs, high_ress)
+            # Calculate loss with different scaling for L1 and MSE components
+            l1_loss = self.criterion(outputs, high_ress) * 0.5
+            mse_loss = self.mse_criterion(outputs, high_ress) * 0.5
+            total_loss = l1_loss + mse_loss
 
             # Backward pass and optimize
             self.optimizer.zero_grad()
-            loss.backward()
+            total_loss.backward()
             self.optimizer.step()
 
-            running_loss += loss.item()
+            running_loss += total_loss.item()
 
         epoch_loss = running_loss / len(self.train_loader)
         self.train_losses.append(epoch_loss)
@@ -287,11 +331,19 @@ class FineTuner:
                 low_ress = batch['low_ress'].to(self.device)
                 high_ress = batch['high_ress'].to(self.device)
 
-                features = self.model.cnn(low_ress) if hasattr(self.model, 'cnn') else self.model.extract_features(low_ress)
+                try:
+                    features = self.model.cnn(low_ress)
+                except AttributeError:
+                    features = self.model.extract_features(low_ress)
+
                 outputs = self.model.upsample(features)
 
-                loss = self.criterion(outputs, high_ress)
-                val_loss += loss.item()
+                # Calculate same loss combination
+                l1_loss = self.criterion(outputs, high_ress) * 0.5
+                mse_loss = self.mse_criterion(outputs, high_ress) * 0.5
+                total_loss = l1_loss + mse_loss
+
+                val_loss += total_loss.item()
 
         self.current_val_loss = val_loss / len(self.val_loader)
         self.val_losses.append(self.current_val_loss)
@@ -318,6 +370,9 @@ class FineTuner:
             if self.val_loader is not None:
                 val_loss = self._validate_epoch()
 
+                # Update learning rate scheduler based on validation loss
+                self.scheduler.step(val_loss)
+
                 # Log metrics
                 self._log_metrics(epoch + 1, train_loss, val_loss)
 
@@ -325,25 +380,28 @@ class FineTuner:
                 if self.current_val_loss < self.best_val_loss:
                     print(f"Validation loss improved from {self.best_val_loss:.4f} to {self.current_val_loss:.4f}")
                     self.best_val_loss = self.current_val_loss
-                    model_save_path = os.path.join(self.output_dir, "aiuNN-finetuned")
+                    model_save_path = os.path.join(self.ouptut_dir, "aiuNN-optimized")
                     self.model.save(model_save_path)
                     print(f"Model saved to: {model_save_path}")
 
-    def __repr__(self):
-        return f"ModelTrainer (model={type(self.model).__name__}, batch_size={self.batch_size})"
+        # After training, save the final model
+        final_model_path = os.path.join(self.ouptut_dir, "aiuNN-final")
+        self.model.save(final_model_path)
+        print(f"\nFinal model saved to: {final_model_path}")
+        
         
 if __name__ == "__main__":
     # Load your model first
-    model = AIIABase.load("/root/vision/AIIA/AIIA-base-512/")
+    model = AIIABase.load("/root/vision/dataset/AIIA-base-512/")
 
     trainer = FineTuner(
         model=model,
         dataset_paths=[
-            "/root/training_data/vision-dataset/image_upscaler.parquet",
-            "/root/training_data/vision-dataset/image_vec_upscaler.parquet"
+            "/root/training_data/vision-dataset/image_upscaler.0",
+            "/root/training_data/vision-dataset/image_vec_upscaler.0"
         ],
-        batch_size=2,
-        learning_rate=0.001
+        batch_size=8,  # Increased batch size
+        learning_rate=1e-4  # Reduced initial LR
     )
 
-    trainer.train(num_epochs=3)
+    trainer.train(num_epochs=10)  # Extended training time

src/aiunn/inference.py

@@ -5,7 +5,7 @@ from torch.nn import functional as F
 from aiia.model import AIIABase
 
 class UpScaler:
-    def __init__(self, model_path="AIIA-base-512-upscaler", device="cuda"):
+    def __init__(self, model_path="aiuNN-finetuned", device="cuda"):
         self.device = torch.device(device)
         self.model = AIIABase.load(model_path).to(self.device)
         self.model.eval()