当安全表现为一种明显的社会需求时，采用拿来主义，借鉴和应用相关的技术，很快实现安全的基本要素，满足社会的安全需求是自然的事，是必然的过程。但是这种方式一定会陆续出现一些严重的问题和不足，如上面提到的误报警率高的问题。于是人们开始改造这些拿来的技术，形成安防技术的研究方向，开始出现安防特有的技术和产品。这就是安防技术发生、发展的轨迹。下面进行归纳和总结。

一项技术（产品）被用于安全的目的，由此具备了功能、结构及系统运行管理上的特点，这些特点是由安全目标的特殊性、安防系统探测对象的特殊性所决定的，它包括特殊的功能和性能要求、特定的体系结构（应用模式）及特别的评价标准和方法。为适应这些特点所进行的研究成为安防技术研究的一个方向，一个个方向构成了安防技术的体系，产生了安防系统的专用的技术、产品。

视频监控就是一门被用于安全的技术，早期的应用就是实时监控，作为报警系统的复核手段，如同一般的工业电视系统。逐渐的，人们开始开发它更多的功能，以满足特殊的安全要求。利用视频监控，人们可以在特殊环境下获得图像信息，于是出现了日／夜转换、红外摄像、特殊的防护装置等高灵敏度、适应严酷环境的安防专用摄像设备；数字视频技术的出现，极大地促进了视频监控在安防系统中的应用，产生专门应用于安防系统的产品和系统，如数字视频记录设备（DVR）、视频网关、远程视频监控系统等。这些产品和应用模式是安防系统所独具的，是为满足安全需求而产生的；随着数字视频应用的深入，实时监控已不能满足安全的需求了，对图像的自动分析、理解、识别，使具有探测和预警功能，成为视频监控技术主要的研究方向，也成为拉动安防技术发展的主导技术。因此，虽然可以说安防系统是电视技术的一个重要的应用领域，但也可以说，视频监控（特别是上述的专用技术和产品）已是安防技术的一个重要的或主要的部分。

其他一些技术也是如此，如红外探测技术是最早应用在安全领域的探测手段，但是安防系统的特殊要求（探测的真实性）促使安防科技人员进行了探测元结构、信号处理技术上的改进和专业化的设计，使之成为独具特色的入侵探测设备和系统。

一门应用技术的发展，除了要充分利用其他通用技术提供的基础外，注意突出自己的特点是很重要的。凡事预则立，不预则废，突出了特点，就找到了方向，就会有许多课题摆在我们面前。以往，人们比较注意强调安全应用的特点，或强调安全应用目的的重要性，用一种神秘感和特殊性把安防技术隐藏起来。这样会忽略了去寻找和建立（形成）技术上的特点，从而影响了安防技术自身的发展。

When security is expressed as an obvious social demand, it is natural and inevitable to adopt the doctrine of taking, learn from and apply relevant technologies to quickly realize the basic elements of security and meet the social security demand. However, there will be some serious problems and deficiencies in this way, such as the high false alarm rate mentioned above. So people began to transform these technologies, form the research direction of security technology, and began to appear unique technologies and products of security. This is the track of the occurrence and development of security technology. The following is a summary.
A technology (product) is used for the purpose of safety, so it has the characteristics of function, structure and system operation management. These characteristics are determined by the particularity of safety objectives and the particularity of detection objects of security system. It includes special function and performance requirements, specific architecture (application mode) and special evaluation standards and methods. In order to adapt to these characteristics, the research has become a direction of security technology research. Each direction constitutes the system of security technology and produces special technologies and products of security system.
Video monitoring is a technology used for security. Its early application is real-time monitoring, which is a means of rechecking the alarm system, just like the general industrial TV system. Gradually, people began to develop more functions to meet special security requirements. Using video surveillance, people can obtain image information in special environment, so there are special security camera equipment with high sensitivity and suitable for harsh environment, such as day / night conversion, infrared camera and special protective device; The emergence of digital video technology has greatly promoted the application of video surveillance in security system, and produced products and systems specially used in security system, such as digital video recording equipment (DVR), video gateway, remote video surveillance system, etc. These products and application modes are unique to the security system and are produced to meet the security needs; With the in-depth application of digital video, real-time monitoring can no longer meet the needs of security. The automatic analysis, understanding and recognition of images have the functions of detection and early warning, which has become the main research direction of video monitoring technology and the leading technology driving the development of security technology. Therefore, although it can be said that the security system is an important application field of TV technology, it can also be said that video surveillance (especially the above-mentioned special technologies and products) is an important or main part of security technology.
The same is true for other technologies. For example, infrared detection technology is the earliest detection means applied in the security field, but the special requirements of security system (authenticity of detection) urge security scientists and technicians to improve and professionalize the detection element structure and signal processing technology, making it a unique intrusion detection equipment and system.
In addition to making full use of the foundation provided by other general technologies, it is very important to highlight their own characteristics in the development of an application technology. Everything is established in advance and abandoned without advance. If we highlight the characteristics, we will find the direction, and many topics will be put in front of us. In the past, people paid more attention to emphasizing the characteristics of security application or the importance of the purpose of security application, and hid the security technology with a sense of mystery and particularity. This will neglect to find and establish (form) technical characteristics, thus affecting the development of security technology itself.