diff --git a/demo.py b/demo.py
index 5281843..1b0396e 100644
--- a/demo.py
+++ b/demo.py
@@ -6,7 +6,8 @@ import tkinter as tk
 from tkinter import filedialog
 from PIL import Image, ImageTk
 
-OPENED_IMAGE = None
+
+CURRENT_IMAGE_BASENAME = None  # Track the basename of the currently opened image
 
 def padding(file_path, border_width):
     image = cv2.imread(file_path)
@@ -145,9 +146,9 @@ def _open_image(file_path):
     # Update label inside frame with the correct dimensions
     image_label.config(image=tk_img, height=height, width=width)
 
-    global OPENED_IMAGE
-    OPENED_IMAGE = file_path  # Store opened image in global variable, to access later if needed
-    
+
+    global CURRENT_IMAGE_BASENAME
+    CURRENT_IMAGE_BASENAME = os.path.basename(file_path)
     print("Opened image:", file_path)
 
 
@@ -168,20 +169,20 @@ if __name__ == "__main__":
     file_menu = tk.Menu(menu, tearoff=0)
     menu.add_cascade(label="File", menu=file_menu)
     file_menu.add_command(label="Open Image", command=open_image)
-    file_menu.add_command(label="Save Image", command=lambda: _save_image(OPENED_IMAGE))
+    file_menu.add_command(label="Save Image", command=lambda: _save_image(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
     file_menu.add_command(label="Exit", command=root.quit)
 
     test_menu = tk.Menu(menu, tearoff=0)
     menu.add_cascade(label="Test", menu=test_menu)
-    test_menu.add_command(label="Padding", command=lambda: padding(OPENED_IMAGE, border_width=50) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Crop", command=lambda: crop(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Resize", command=lambda: resize(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Copy", command=lambda: copy(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Greyscale", command=lambda: grayscale(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Hsv", command=lambda: hsv(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Hue Shifted", command=lambda: hue_shifted(OPENED_IMAGE, hue=50) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Smoothed", command=lambda: smoothing(OPENED_IMAGE) if OPENED_IMAGE is not None else print("No image opened."))
-    test_menu.add_command(label="Rotated", command=lambda: rotation(OPENED_IMAGE, rotation_angle=90) if OPENED_IMAGE is not None else print("No image opened."))
+    test_menu.add_command(label="Padding", command=lambda: padding(f"cache/{CURRENT_IMAGE_BASENAME}", border_width=50) if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Crop", command=lambda: crop(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Resize", command=lambda: resize(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Copy", command=lambda: copy(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Greyscale", command=lambda: grayscale(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Hsv", command=lambda: hsv(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Hue Shifted", command=lambda: hue_shifted(f"cache/{CURRENT_IMAGE_BASENAME}", hue=50) if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Smoothed", command=lambda: smoothing(f"cache/{CURRENT_IMAGE_BASENAME}") if CURRENT_IMAGE_BASENAME else print("No image opened."))
+    test_menu.add_command(label="Rotated", command=lambda: rotation(f"cache/{CURRENT_IMAGE_BASENAME}", rotation_angle=90) if CURRENT_IMAGE_BASENAME else print("No image opened."))
 
 
     clipboard_menu = tk.Menu(menu, tearoff=0)