opencv-python (cv2):视频解码、图像绘制、裁剪和保存; numpy:数值计算,数组操作; Pillow (PIL.Image)(延迟导入):图像读写与处理; matplotlib、seaborn:可视化与图表绘制; opencv-python (cv2):视频解码、图像绘制、裁剪和保存; numpy:数值计算,数组操作; ...