你好，在计算FFM时出现D:\pycharm_project\preprocess\FFM\2.py:81: RankWarning: Polyfit may be poorly conditioned selected_img_info = Box_counting_modified(selected_img)，参数设置为：step_size = 1 ，window_size = 5 。请问是正常现象吗？
你好，在计算FFM时出现D:\pycharm_project\preprocess\FFM\2.py:81: RankWarning: Polyfit may be poorly conditioned selected_img_info = Box_counting_modified(selected_img)，参数设置为：step_size = 1 ，window_size = 5 。请问是正常现象吗？