diff --git a/.gitignore b/.gitignore
index 814dca6..d903f78 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,6 +44,8 @@ venv/
 # Data & models
 data/
 models/
+.neptune/*
+outputs/*
 
 # Exclude 'imnet_sample' from being ignored
-!data/imnet_sample/
\ No newline at end of file
+!data/imnet_sample/
diff --git a/configs/biosr.yaml b/configs/biosr.yaml
index 2a43a69..8c40f42 100644
--- a/configs/biosr.yaml
+++ b/configs/biosr.yaml
@@ -1,13 +1,13 @@
 task: "biosr_sr"
 
 model:
-  noise_model_type: "unet"
+  noise_model_type: "sr3"
   alpha: 0.001
-  load_weights: null
+  load_weights: '/home/gabriel/Documents/p_code/cvdm/outputs/biosr/weights/model_0_4e9fa08f-beb8-4335-907f-32bbe3f70a72.h5'
   load_mu_weights: null
   snr_expansion_n: 1
   zmd: False
-  diff_inp: False
+  diff_inp: True
 
 training:
   lr: 0.0001
@@ -16,18 +16,18 @@ training:
 eval:
   output_path: "outputs/biosr"
   generation_timesteps: 200
-  checkpoint_freq: 1000
+  checkpoint_freq: 10000
   log_freq: 10
-  image_freq: 100
+  image_freq: 1000
   val_freq: 200
   val_len: 100
 
 data:
-  dataset_path: "/bigdata/casus/MLID/maria/biosr_sample"
+  dataset_path: "/media/gabriel/data_hdd/biosr_dataset/train/biosr_ds.npz"
   n_samples: 100
-  batch_size: 2
+  batch_size: 4
   im_size: 256
 
 neptune:
   name: "CVDM"
-  project: "mlid/test"
\ No newline at end of file
+  project: "mlid/testing-cvdm"
\ No newline at end of file
diff --git a/cvdm/utils/inference_utils.py b/cvdm/utils/inference_utils.py
index 0c5c396..35f11cb 100644
--- a/cvdm/utils/inference_utils.py
+++ b/cvdm/utils/inference_utils.py
@@ -9,16 +9,16 @@
 from tensorflow.keras.models import Model
 from tqdm import tqdm
 
-from cvdm.utils.metrics_utils import calculate_metrics
+
 
 
 def ddpm_obtain_sr_img(
-    x: np.ndarray,
-    timesteps_test: int,
-    noise_model: Model,
-    schedule_model: Model,
-    mu_model: Optional[Model],
-    out_shape: Optional[Tuple[int, ...]] = None,
+        x: np.ndarray,
+        timesteps_test: int,
+        noise_model: Model,
+        schedule_model: Model,
+        mu_model: Optional[Model],
+        out_shape: Optional[Tuple[int, ...]] = None,
 ) -> Tuple[np.ndarray, np.ndarray, np.ndarray]:
     if out_shape == None:
         out_shape = x.shape
@@ -51,9 +51,9 @@ def ddpm_obtain_sr_img(
         beta_factor = (1 - gamma_tm1) * beta_t / (1 - gamma_t)
         if count > 0:
             pred_sr = (
-                np.sqrt(gamma_t) * pred_sr
-                + np.sqrt(1 - gamma_t - beta_factor) * pred_noise
-                + np.sqrt(beta_factor) * z
+                    np.sqrt(gamma_t) * pred_sr
+                    + np.sqrt(1 - gamma_t - beta_factor) * pred_noise
+                    + np.sqrt(beta_factor) * z
             )
         if mu_model is not None:
             pred_noise = noise_model.predict([pred_sr, x, mu_pred, gamma_t], verbose=0)
@@ -70,10 +70,10 @@ def ddpm_obtain_sr_img(
 
 
 def create_output_montage(
-    pred_y: np.ndarray,
-    gamma_vec: np.ndarray,
-    y: np.ndarray,
-    x: Optional[np.ndarray],
+        pred_y: np.ndarray,
+        gamma_vec: np.ndarray,
+        y: np.ndarray,
+        x: Optional[np.ndarray],
 ) -> np.ndarray:
     if pred_y.shape[3] > 1:
         channel_axis = 3
@@ -125,7 +125,7 @@ def log_loss(run: Optional[Run], avg_loss: np.ndarray, prefix: str) -> None:
 
 
 def log_metrics(
-    run: Optional[Run], metrics_dict: Dict[str, float], prefix: str
+        run: Optional[Run], metrics_dict: Dict[str, float], prefix: str
 ) -> None:
     if run is not None:
         for metric_name, metric_value in metrics_dict.items():
@@ -137,25 +137,25 @@ def log_metrics(
 
 
 def save_weights(
-    run: Optional[Run],
-    model: Model,
-    mu_model: Optional[Model],
-    step: int,
-    output_path: str,
-    run_id: str,
+        run: Optional[Run],
+        model: Model,
+        mu_model: Optional[Model],
+        step: int,
+        output_path: str,
+        run_id: str,
 ) -> None:
     weights_dir = f"{output_path}/weights"
     os.makedirs(weights_dir, exist_ok=True)
 
     model_weights_path = f"{weights_dir}/model_{str(step)}_{run_id}.h5"
-    model.save_weights(model_weights_path, True)
+    model.save_weights(model_weights_path)
 
     if run is not None:
         run[f"model_weights/model_{str(step)}.h5"].upload(model_weights_path)
 
     if mu_model is not None:
         mu_model_weights_path = f"{weights_dir}/mu_model_{str(step)}_{run_id}.h5"
-        mu_model.save_weights(mu_model_weights_path, True)
+        mu_model.save_weights(mu_model_weights_path)
 
         if run is not None:
             run[f"mu_model_weights/mu_model_{str(step)}.h5"].upload(
@@ -164,13 +164,13 @@ def save_weights(
 
 
 def save_output_montage(
-    run: Optional[Run],
-    output_montage: np.ndarray,
-    step: int,
-    output_path: str,
-    run_id: str,
-    prefix: str,
-    cmap: Optional[str] = None,
+        run: Optional[Run],
+        output_montage: np.ndarray,
+        step: int,
+        output_path: str,
+        run_id: str,
+        prefix: str,
+        cmap: Optional[str] = None,
 ) -> None:
     output_dir = f"{output_path}/images"
     os.makedirs(output_dir, exist_ok=True)
@@ -186,16 +186,15 @@ def save_output_montage(
 
 
 def obtain_output_montage_and_metrics(
-    batch_x: np.ndarray,
-    batch_y: np.ndarray,
-    noise_model: Model,
-    schedule_model: Model,
-    mu_model: Optional[Model],
-    generation_timesteps: int,
-    diff_inp: bool,
-    task: str,
-) -> Tuple[np.ndarray, Dict]:
-
+        batch_x: np.ndarray,
+        batch_y: np.ndarray,
+        noise_model: Model,
+        schedule_model: Model,
+        mu_model: Optional[Model],
+        generation_timesteps: int,
+        diff_inp: bool,
+        task: str,
+) -> np.ndarray:
     pred_diff, gamma_vec, _ = ddpm_obtain_sr_img(
         batch_x,
         generation_timesteps,
@@ -205,11 +204,15 @@ def obtain_output_montage_and_metrics(
         batch_y.shape,
     )
     if diff_inp:
-        pred_y = np.clip(pred_diff + batch_x, -1, 1)
+        pred_y = pred_diff + batch_x
+    else:
+        pred_y = pred_diff
+
+    if task == 'imagenet_sr':
+        pred_y = np.clip(pred_y, -1, 1)
     else:
-        pred_y = np.clip(pred_diff, -1, 1)
+        pred_y = np.clip(pred_y, -1, 1)
 
-    metrics = calculate_metrics(pred_y, batch_y)
     if task in ["biosr_sr", "imagenet_sr"]:
         gamma_vec = np.clip(gamma_vec[..., generation_timesteps // 2], -1, 1)
         montage_x = batch_x
@@ -224,4 +227,4 @@ def obtain_output_montage_and_metrics(
     )
     if task in ["biosr_sr", "imagenet_sr"]:
         output_montage = (output_montage * 127.5 + 127.5).astype(np.uint8)
-    return output_montage, metrics
+    return output_montage
diff --git a/cvdm/utils/metrics_utils.py b/cvdm/utils/metrics_utils.py
new file mode 100644
index 0000000..075cf00
--- /dev/null
+++ b/cvdm/utils/metrics_utils.py
@@ -0,0 +1,55 @@
+from typing import Dict, Optional
+
+import numpy as np
+from skimage.metrics import peak_signal_noise_ratio, structural_similarity
+#TODO: make the metrics calculations depend on the experiment. this file is a placeholder.
+
+def nmae(y_pred: np.ndarray, y_real: np.ndarray) -> float:
+    nmae: float = np.sqrt(np.sum((y_pred - y_real) ** 2)) / np.sqrt(np.sum(y_real**2))
+    return nmae
+
+
+def calculate_metrics(
+    y_pred_batch: np.ndarray,
+    y_real_batch: np.ndarray,
+) -> Dict[str, float]:
+    y_pred_batch = np.array(y_pred_batch)
+    y_real_batch = np.array(y_real_batch)
+
+    if y_pred_batch.shape[3] > 1:
+        channel_axis = 2
+    else:
+        channel_axis = None
+
+    metrics = {
+        "mse": np.mean((y_pred_batch - y_real_batch) ** 2),
+        "mape": np.mean(np.abs((y_real_batch - y_pred_batch) / y_real_batch + 1e-10))
+        * 100,
+        "nmae": np.mean(
+            [
+                np.mean(np.abs(y_pred - y_real)) / np.mean(np.abs(y_real) + 1e-10)
+                for y_pred, y_real in zip(y_pred_batch, y_real_batch)
+            ]
+        ),
+        "psnr": np.mean(
+            [
+                peak_signal_noise_ratio(
+                    np.squeeze(y_pred), np.squeeze(y_real), data_range=2
+                )
+                for y_pred, y_real in zip(y_pred_batch, y_real_batch)
+            ]
+        ),
+        "ssim": np.mean(
+            [
+                structural_similarity(
+                    np.squeeze(y_pred),
+                    np.squeeze(y_real),
+                    data_range=2,
+                    channel_axis=channel_axis,
+                )
+                for y_pred, y_real in zip(y_pred_batch, y_real_batch)
+            ]
+        ),
+    }
+
+    return metrics
diff --git a/cvdm/utils/training_utils.py b/cvdm/utils/training_utils.py
index ce948c6..464de62 100644
--- a/cvdm/utils/training_utils.py
+++ b/cvdm/utils/training_utils.py
@@ -7,23 +7,25 @@
 
 from cvdm.configs.data_config import DataConfig
 from cvdm.data.image_dir_dataloader import ImageDirDataloader
-from cvdm.data.npy_dataloader import NpyDataloader
+from cvdm.data.biosr_dataloader import BioSRDataloader
 from cvdm.data.phase_2shot_dataloader import Phase2ShotDataloader
 from cvdm.data.phase_polychrome_dataloader import PhasePolychromeDataloader
 
 
 def prepare_dataset(
-    task: str, data_config: DataConfig, training: bool
+        task: str, data_config: DataConfig, training: bool
 ) -> Tuple[tf.data.Dataset, tf.TensorShape, tf.TensorShape]:
     dataloader: Callable[
         [], Iterator[Tuple[np.ndarray[Any, Any], np.ndarray[Any, Any]]]
     ]
     if task == "biosr_sr":
-        dataloader = NpyDataloader(
+        dataloader = BioSRDataloader(
             path=data_config.dataset_path,
             n_samples=data_config.n_samples,
             im_size=data_config.im_size,
         )
+        x_channels = 1
+        y_channels = x_channels
 
     elif task == "imagenet_sr":
         dataloader = ImageDirDataloader(
@@ -53,12 +55,8 @@ def prepare_dataset(
         x_channels = 2
         y_channels = 1
     elif task == "other":
-        dataloader = NpyDataloader(
-            path=data_config.dataset_path,
-            n_samples=data_config.n_samples,
-            im_size=data_config.im_size,
-        )
-        x_channels, y_channels = dataloader.get_channels()
+        print('Experiment not found')
+        raise NotImplementedError()
     else:
         raise NotImplementedError()
 
@@ -76,7 +74,7 @@ def prepare_dataset(
 
 
 def prepare_model_input(
-    x: np.ndarray, y: np.ndarray, diff_inp: bool = False
+        x: np.ndarray, y: np.ndarray, diff_inp: bool = False
 ) -> List[np.ndarray]:
     if diff_inp:
         dfy = y - x
@@ -88,7 +86,7 @@ def prepare_model_input(
 
 
 def train_on_batch_cvdm(
-    batch_x: np.ndarray, batch_y: np.ndarray, joint_model: Model, diff_inp: bool = False
+        batch_x: np.ndarray, batch_y: np.ndarray, joint_model: Model, diff_inp: bool = False
 ) -> np.ndarray:
     model_input = prepare_model_input(batch_x, batch_y, diff_inp)
     loss = joint_model.train_on_batch(model_input, np.zeros_like(batch_y))
diff --git a/eval.py b/eval.py
index 2c358cb..1745043 100644
--- a/eval.py
+++ b/eval.py
@@ -69,8 +69,12 @@ def main() -> None:
         model_config=model_config,
     )
     if model_config.load_weights is not None:
+        print('weights loaded...')
         joint_model.load_weights(model_config.load_weights)
+    else:
+        print('no weights loaded...')
     if model_config.load_mu_weights is not None and mu_model is not None:
+        print('weights loaded...')
         mu_model.load_weights(model_config.load_mu_weights)
 
     run = None
@@ -88,21 +92,19 @@ def main() -> None:
     cumulative_loss = np.zeros(5)
     run_id = str(uuid.uuid4())
     step = 0
-    cumulative_metrics: Dict[str, float] = defaultdict(float)
-    total_samples = 0
 
     for batch in dataset:
         batch_x, batch_y = batch
 
         cmap = (
-            "gray" if task in ["biosr_phase", "imagenet_phase", "hcoco_phase"] else None
+            "gray" if task in ["biosr_sr", "biosr_phase", "imagenet_phase", "hcoco_phase"] else None
         )
         model_input = prepare_model_input(batch_x, batch_y, diff_inp=diff_inp)
         cumulative_loss += joint_model.evaluate(
             model_input, np.zeros_like(batch_y), verbose=0
         )
-
-        output_montage, metrics = obtain_output_montage_and_metrics(
+        # TODO: add meaningful metrics for each experiment.
+        output_montage = obtain_output_montage_and_metrics(
             batch_x,
             batch_y.numpy(),
             noise_model,
@@ -112,17 +114,8 @@ def main() -> None:
             diff_inp,
             task,
         )
-        for metric_name, metric_value in metrics.items():
-            cumulative_metrics[metric_name] += metric_value * batch_size
-        total_samples += batch_size
         step += 1
 
-    average_metrics = {
-        metric_name: total / total_samples
-        for metric_name, total in cumulative_metrics.items()
-    }
-
-    log_metrics(run, average_metrics, prefix="val")
     save_output_montage(
         run=run,
         output_montage=output_montage,
diff --git a/tests/test_imports.py b/tests/test_imports.py
index 69aec35..aaf0360 100644
--- a/tests/test_imports.py
+++ b/tests/test_imports.py
@@ -36,3 +36,5 @@ def test_imports():
 
     except ImportError as e:
         assert False, f"Import failed: {e}"
+
+test_imports()
\ No newline at end of file
diff --git a/train.py b/train.py
index 779e39f..4299aaa 100644
--- a/train.py
+++ b/train.py
@@ -32,7 +32,6 @@
 
 
 def main() -> None:
-
     # The script accepts the following command-line arguments:
     # - `--config-path`: The path to the YAML configuration file (required).
     # - `--neptune-token`: The API token for Neptune (optional).
@@ -116,7 +115,7 @@ def main() -> None:
         for batch in dataset:
             batch_x, batch_y = batch
 
-            cmap = "gray" if task in ["biosr_phase", "imagenet_phase"] else None
+            cmap = "gray" if task in ["biosr_sr ,biosr_phase", "imagenet_phase"] else None
             cumulative_loss += train_on_batch_cvdm(
                 batch_x, batch_y, joint_model, diff_inp=diff_inp
             )
@@ -135,7 +134,7 @@ def main() -> None:
                 )
 
             if step % image_freq == 0:
-                output_montage, metrics = obtain_output_montage_and_metrics(
+                output_montage = obtain_output_montage_and_metrics(
                     batch_x,
                     batch_y.numpy(),
                     noise_model,
@@ -145,7 +144,7 @@ def main() -> None:
                     diff_inp,
                     task,
                 )
-                log_metrics(run, metrics, prefix="train")
+                # log_metrics(run, metrics, prefix="train")
                 save_output_montage(
                     run=run,
                     output_montage=output_montage,