diff --git a/README.md b/README.md
index 854a8e2..40c5ac8 100644
--- a/README.md
+++ b/README.md
@@ -39,4 +39,6 @@ python cli.py --source <image folder path> --destination <pass folder> --rejects
 - Sort images according to size
 - Remove black or blank images
 - Remove white/gray images
+- Remove blurry images
 - Use multithreading to increase performance
+- Remove images with no meter readings
diff --git a/cli.py b/cli.py
index 18af5cf..28c7a1e 100644
--- a/cli.py
+++ b/cli.py
@@ -5,6 +5,11 @@ from sorter.image_sorter import process_image
 
 # CLI argument parsing
 def parse_arguments():
+    """Parse command-line arguments.
+
+    Returns:
+        argparse.Namespace: Parsed command-line arguments.
+    """
     parser = argparse.ArgumentParser(description="Clean images from electricity meter readings.")
     parser.add_argument("--source", type=str, help="Path to the input folder containing the images")
     parser.add_argument("--destination", type=str, help="Path to the pass folder for images that pass the test")
@@ -12,6 +17,8 @@ def parse_arguments():
     return parser.parse_args()
 
 def main():
+    """Main entry point of the program."""
+     
     # Parse command-line arguments
     args = parse_arguments()
     
diff --git a/sorter/image_sorter.py b/sorter/image_sorter.py
index d9e0d01..c114a68 100644
--- a/sorter/image_sorter.py
+++ b/sorter/image_sorter.py
@@ -11,15 +11,17 @@ threshold_type = cv2.THRESH_BINARY
 
 
 def is_image_below_threshold(image_path, size_threshold):
-    """If the image size is below the threshold, regardless of the thresholding
-    result, the image will be moved to the reject folder.
+    """Check if the image size is below the threshold.
+
+    If the image size is below the threshold, regardless of the thresholding result,
+    the image will be moved to the reject folder.
 
     Args:
-        image_path (_type_): _description_
-        size_threshold (_type_): _description_
+        image_path (str): Path to the image file.
+        size_threshold (int): Size threshold in bytes.
 
     Returns:
-        _type_: _description_
+        bool: True if the image size is below the threshold, False otherwise.
     """
     image_path = Path(image_path)
     size = image_path.stat().st_size
@@ -27,20 +29,20 @@ def is_image_below_threshold(image_path, size_threshold):
 
 
 def process_image(image_path,pass_folder,reject_folder,size_threshold=75*1024):
-    """_summary_
+    """Process an image by applying thresholding and moving it to the appropriate folder.
 
     Args:
-        image_path (_type_): _description_
-        pass_folder (_type_): _description_
-        reject_folder (_type_): _description_
-        size_threshold (_type_, optional): _description_. Defaults to 75*1024.
+        image_path (str): Path to the image file.
+        pass_folder (str): Path to the pass folder for images that pass the test.
+        reject_folder (str): Path to the reject folder for images that fail the test.
+        size_threshold (int, optional): Size threshold in bytes. Defaults to 75*1024.
     """
     image_path = Path(image_path)
     filename = image_path.name
     image  = cv2.imread(str(image_path))
     gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
     
-    # threshold(src, dst, threshold value, max value, threshold type)
+     # Apply thresholding (src, dst, threshold value, max value, threshold type)
     _, threshold = cv2.threshold(gray, threshold_value, max_value, threshold_type)
     
     
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29