converted to sequence of images

SPIDER.py

@@ -66,11 +66,11 @@ def subset_file_list(all_files: List[str], subset_ids: Set[int]):
 
 def standardize_3D_image(
     image: np.ndarray,
-    resize_shape: Tuple[int, int, int],
+    resize_shape: Tuple[int, int],
 ) -> np.ndarray:
     """Aligns dimensions of image to be (height, width, channels); resizes
-    images to values specified in resize_shape; and rescales pixel values
-    to Uint8."""
+    images to height/width values specified in resize_shape; and rescales 
+    pixel values to Uint8."""
     # Align height, width, channel dims
     if image.shape[0] < image.shape[2]:
         image = np.transpose(image, axes=[1, 2, 0])
@@ -519,6 +519,16 @@ class SPIDER(datasets.GeneratorBasedBuilder):
                 image_array_original,
                 resize_shape,
             )
+            
+            # Split image array into sequence of 2D images
+            split_len = image_array_standardized.shape[-1]
+            images_seq = [
+                np.squeeze(arr) for arr in np.split(
+                    image_array_standardized,
+                    split_len,
+                    axis=-1,
+                )
+            ]
 
             # Load .mha mask file
             mask_path = os.path.join(paths_dict['masks'], 'masks', example)
@@ -537,6 +547,16 @@ class SPIDER(datasets.GeneratorBasedBuilder):
                 resize_shape,
             )
 
+            # Split mask array into sequence of 2D images
+            split_len = mask_array_standardized.shape[-1]
+            masks_seq = [
+                np.squeeze(arr) for arr in np.split(
+                    mask_array_standardized,
+                    split_len,
+                    axis=-1,
+                )
+            ]
+    
             # Extract overview data corresponding to image
             image_overview = overview_dict[scan_id]
 
@@ -547,8 +567,8 @@ class SPIDER(datasets.GeneratorBasedBuilder):
             return_dict = {
                 'patient_id':patient_id,
                 'scan_type':scan_type,
-                'image':image_array_standardized,
-                'mask':mask_array_standardized,
+                'image':images_seq,
+                'mask':masks_seq,
                 'image_path':image_path, 
                 'mask_path':mask_path, 
                 'metadata':image_overview,