Merge pull request #968 from annie-xd-wang/445-arbitrary-roi

Author: AdvancedImagingUTSW

src/navigate/controller/sub_controllers/camera_settings.py

@@ -319,8 +319,8 @@ def update_experiment_values(self, *args):
                 )
                 return warning_message
 
-            center_x = (bottom_x - top_x) // 2
-            center_y = (bottom_y - top_y) // 2
+            center_x = (bottom_x + top_x) // 2
+            center_y = (bottom_y + top_y) // 2
         else:
             center_x = self.default_width // 2
             center_y = self.default_height // 2