Update app.py

app.py

@@ -7,7 +7,7 @@ from PIL import Image
 face_cascade = cv2.CascadeClassifier(cv2.data.haarcascades + "haarcascade_frontalface_default.xml")
 
 # Face Detection Function
-def detect_faces(image,slider):
+def detect_faces(image_np,slider):
     # Convert image to grayscale
     gray_image = cv2.cvtColor(image_np, cv2.COLOR_RGB2GRAY)