annotation update

opencv_webcam.py

@@ -60,6 +60,7 @@ def webcam_opencv(device_index, quit_key, pause_key, is_autoSaveFrame, frame_sav
     keyList = [quit_key, frame_capKey, pause_key]  # 快捷键列表
     hotkey_judge(keyList)  # 快捷键冲突判断
 
+    #------------------程序开始------------------
     s_time = time.time()  # 起始时间
     cap = cv2.VideoCapture(device_index)  # 连接设备
     frame_width = cap.get(3)  # 宽度
@@ -105,12 +106,12 @@ def webcam_opencv(device_index, quit_key, pause_key, is_autoSaveFrame, frame_sav
                 cv2.waitKey(0)  # 暂停，按任意键继续
 
         print(f'一共处理了{frame_num}帧')
-        # 释放缓存
+        # 释放缓存资源
         cap.release()
         cv2.destroyAllWindows()
     else:  # 连接设备失败
         print(f'摄像头连接异常！')
-
+    #------------------程序结束------------------
     print(f'程序结束！')
     e_time = time.time()  # 终止时间
     print(f'用时：{round((e_time - s_time), 3)}秒, {round((e_time - s_time)/60, 3)}分, {round((e_time - s_time)/3600, 3)}小时')