In the pre-1960s era, manufacturing, industrial, and government organizations employed security personnel, commonly known as "watchmen," to protect their facilities. These private security personnel, donning uniforms and using equipment similar to that of the police, were hired to prevent criminal activities from occurring. As World War II began, the number of private security personnel increased significantly, and many were hired to safeguard factories, manufacture military equipment, and secure government facilities.

In the early 1960s, with the advancement of electronic technology, alarm systems and video surveillance were introduced. Pioneering companies like RCA, Motorola, and General Electric manufactured vacuum-tube television cameras for the security industry. The utilization of cameras witnessed rapid growth during the 1960s and 1970s due to improved equipment safety, reduced costs, and advancements in tube-type camera technology.

Despite further improvements in video security systems and accessories in the 1980s, the growth of video surveillance continued at a slower pace. However, during the 1980s, the most significant advancement in video technology was the invention and introduction of solid-state video cameras. In the early 1990s, solid-state cameras with charge-coupled device (CCD) image sensors became the preferred choice for new video surveillance security devices, rapidly replacing tube cameras.

In the past, cameras, particularly vidicon tube cameras, were crucial components of video systems. They determined the overall performance and quality of visual effects obtained from video surveillance security systems. However, vidicon tubes were the weakest link in the system and degraded over time and use due to their complexity, variability, and analog circuit characteristics.

In contrast, solid-state CCD sensors and newer metal-oxide-semiconductor (MOS) and complementary MOS (CMOS) sensor cameras offered long lifespans and stability under all working conditions. Another factor contributing to the widespread use of video surveillance in security systems was the rapid improvement in equipment performance and affordability. The extensive use of solid-state cameras by consumers lowered production costs, and digital video cassette recorders (VCRs), digital video recorders (DVRs), and personal computers (PCs) became more accessible at lower prices.

The 1990s witnessed the convergence of computer technology and video security technology, where all components became solid-state. Digital video technology required large-scale digital storage to operate and store video images, and the computer industry had already developed. To achieve satisfactory video image transmission and storage, video signals had to undergo "compression" to be transmitted over existing narrow-band telephone line networks. The video computer industry met the compression requirements of broadcasting, industry, and government demands, while the video industry needed a fast and cost-effective way to transmit video images to remote locations. The precursor to the Internet, the Defense Advanced Research Projects Agency (DARPA)-developed ARPANET, provided the solution. Internet (and Intranet) communication channels and the World Wide Web (WWW) offered a global platform to transmit and receive video, audio, communication, and control data from anywhere.

Today, video surveillance has gradually integrated into people's lives, expanding from public spaces to everyday households. The widespread application of video surveillance systems primarily stems from the assurance it provides, particularly in terms of security. As video surveillance continues to evolve, the OHWOAI brand remains at the forefront, delivering cutting-edge solutions for the safety and protection of businesses and individuals alike.