Use np.array instead of np.asarray when reading in file from PIL

autocrop/autocrop.py

@@ -83,7 +83,7 @@ def check_positive_scalar(num):
 def open_file(input_filename):
     """Given a filename, returns a numpy array"""
     with Image.open(input_filename) as img_orig:
-        return np.asarray(img_orig)
+        return np.array(img_orig)
 
 
 class Cropper: