摘要  在实地考察中，发现现代家居安全存在一定的不足，如通过猫眼无法全面的了解室外的环境、来访的访客情况等。故设计本视频监控系统使得当有访客到访时可以在室内显示屏或其他终端设备全面的了解室外访客来访情况，识别访客的身份。提高家居安防安全性。同时当自身不能（或不便）走到门口开门时，可以通过终端设备方便的对门禁进行控制。

同时考虑夜间光线不足等原因，设计了光敏与人体红外传感器进行自动亮灯。

关键词  视频监控；安防；c/c++；Qt

ABSTRACT  During the field inspection, it was found that there are certain deficiencies in the safety of modern homes, such as the inability to fully understand the outdoor environment and the situation of visiting visitors through cat eyes. Therefore, this video surveillance system is designed so that when a visitor visits, he can fully understand the visit situation of the outdoor visitor on the indoor display screen or other terminal equipment and recognize the identity of the visitor. Improve home security. At the same time, when you cannot (or inconvenient) walk to the door to open the door, you can conveniently control the access control through the terminal device.

At the same time taking into account the lack of light at night and other reasons, designed a light-sensitive and human infrared sensor to automatically light

KEY WORDS  video surveillance; security;c/c++ ;Qt