Dahua NVR21-4KS3 Series, User Manual

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User's Manual
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1 Introduction
1.1 Overview
The NVR is a high performance network video recorder. This product supports local live view,
multiple-window display, recorded file local storage, remote control and mouse shortcut menu
operation, and remote management and control function.
This product supports center storage, front-end storage and client-end storage. The monitor zone in
the front-end can be set in anywhere. Working with other front-end devices such as IPC, NVS, this
series product can establish a strong surveillance network through the CMS. In the network system,
there is only one network cable from the monitor center to the monitor zone in the whole network.
There is no audio/video cable from the monitor center to the monitor zone. The whole project is
featured by simple connection, low-cost, low maintenance work.
This NVR can be widely used in areas such as public security, water conservancy, transportation and
education.
1.2 Features
AI Functions
AI functions are available on select models and vary with models.
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Face detection. The system can detect the faces are on the video image.
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Face recognition. The system can compare the detected faces with the images in the face
database in real time.
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Human body detection. The system activates alarm actions once human body is detected.
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People counting. The system can effectively count the number of people and flow direction.
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Heat map. The system can monitor the active objects in a specific area.
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Automatic number plate recognition (ANPR). The system can effectively monitor the passing
vehicles.
Smart Playback
This function is available on select models.
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IVS playback. It can screen out and replay the records meeting the set rules.
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Face detection playback. It can screen out and replay the records with human faces.
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Face recognition playback. It can compare the face information in the video with the information
in the database and replay the corresponding records.
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ANPR playback. It can screen out the record with a specific car plate number or all the records