Network cameras become the mainstream in global video surveillance industry. With purpose to offer flexible and cost effective IP video surveillance systems that deliver full high definition 1080p or even 4K ultra high definition video, some manufacturers utilize many IVE technologies, and ROI is one of them. Do you know the function of ROI? ASMAG magazine interviewed Ms Cheng Wei, the marketing manager from Hikvision.
IVE stands for intelligent video encoding, IVE technologies can smartly process video data according to users demand, it can achieve optimum video surveillance performance that balanced image quality and network bandwidth, as well as storage capacity. ROI is the abbreviation of Region of Internet. It's a very useful feature in real video surveillance field. As we know, there are some regions are useless for video monitoring in captured image. These useless regions, however, occupied network bandwidth and storage. The ROI function of network camera, only concentrates on delivering high quality video from interested region. For unchanged region, it transmit less, or even doesn't transmit video.
A: ROI, region of interest. In real video surveillance, users typically concentrates on some specific monitored subjects, such as vehicle plate license, facial etc, however, the blue sky, lawn in the monitored area are not important. For these important regions, we called "regions of interest".
ROI encoding technology firstly established by ISO in 2000, it's one of highlight of the new generation static image compression encoding standard (JPEG2000), also it's a popular researching subject in nowadays video encoding technology. This technology can encode interested regions in video with high sufficient compression ratio. Therefore, under the same bitrate or network bandwidth, it can ensure important information will not loss, it can effectively compress image data, greatly solved the conflict between compression ratio and image quality.
A: Currently, there are two different ROI technologies: one is fixed region, another is dynamic tracking.
In camera ROI setting page, you can turn on ROI function for fixed regions, you can select up to 4 different regions on preview image, ROI encoding level can be 1-6, adjustable.
Firstly, in camera facial recognition setting page, turn on facial recognition and dynamic analysis function, then go to ROI setting page to turn on dynamic tracking ROI function, ROI encoding level also can be 1-6, can achieve facial recognition and dynamic tracking ROI encoding function.
A: Due to the limitation of network bandwidth resources, only can use low bitrate to transmit video stream, still want to monitor important subjects clearly, ROI encoding technology can sacrifice the quality of uninterested / unimportant things, concentrate on important regions encoding, so that obtain video surveillance quality, while no need to increase bandwidth. Which in turn, significantly avoid the increasing cost of video storage and network bandwidth. Moreover, ROI technology become the common supported technology for the majority network cameras from across different manufacturers.
A: ROI isn't a newly developed technology. In the last year, there are major manufacturers,such as Hikvision has launched this technology, you can use this technology to solve the bandwidth shortage in some scenarios. Since the technology moves to H.265, the combination of ROI and H.265 can forwardly reduce the bitrate. By then, people will enjoy the ultra high definition video quality with low bandwidth and storage cost.
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