Update helper functions

NuCLS_dataset.py

@@ -115,11 +115,12 @@ class NuCLSDataset(GeneratorBasedBuilder):
         data_dir = dl_manager.download_and_extract(_URL)
 
         # Directory paths
-        rgb_dir = os.path.join(data_dir, "rgb")
-        visualization_dir = os.path.join(data_dir, "visualization")
-        mask_dir = os.path.join(data_dir, "mask")
-        csv_dir = os.path.join(data_dir, "csv")
-
+        base_dir = os.path.join(data_dir, "NuCLS_dataset")
+        rgb_dir = os.path.join(base_dir, "rgb")
+        visualization_dir = os.path.join(base_dir, "visualization")
+        mask_dir = os.path.join(base_dir, "mask")
+        csv_dir = os.path.join(base_dir, "csv")
+        
         # Generate a list of unique filenames (without extensions)
         unique_filenames = [os.path.splitext(f)[0] for f in os.listdir(rgb_dir)]
 
@@ -176,7 +177,8 @@ class NuCLSDataset(GeneratorBasedBuilder):
         """Reads an image file and returns it as a PIL Image object."""
         try:
             with open(file_path, 'rb') as f:
-                return PilImage.open(f)
+                image = PilImage.open(f)
+                return np.array(image)
         except Exception as e:
             print(f"Error reading image file {file_path}: {e}")
             return None