Configuration Guidance of 2nd generation of Perimeter Detection DeepinMind NVR HIKVISION TECHNICAL SUPPORT TEAM 2018-12-24
1 iDS-9632NXI-I8/16S(B) How to setup an accurate perimeter guarding system with 2nd generation of DeepinMind NVR This quick guide shows you how to set up an accurate perimeter guarding system with 2nd generation of DeepinMind NVR. All operations in the quick guide are based on iDS-9632NXI-I8/16S(B), V4.1.40. 1. Basic introduction In traditional surveillance system, all moving objects trigger perimeter guarding alarm, a large amount of false alarms need to be eliminated essentially.
2 iDS-9632NXI-I8/16S(B) 2. Operation (1) False alarm filter Go to NVR’s web page, Configuration—Event—Smart Event, tick ‘Enable Local Smart Analysis’ (The ‘Enable Local Smart Analysis’ is ticked by default). Then you can enable the smart event and choose between 3 modes: Human, Vehicle or Human& Vehicle. Once you enable the option(s), it will based on the algorithm to filter most of the false alarm.
3 iDS-9632NXI-I8/16S(B) If you want to search false alarms, please go to ‘File Management—Event Type— False Alarm’ and find out. You also can search false alarm via customized iVMS-4200. Note: 1) Sensitivity: Related to the proportion of the target across the line and the target itself, which can trigger the alarm. The higher the sensitivity, the more easily the alarm is triggered. The interpretation figure is as follow: © Hikvision Digital Technology Co., Ltd. All Rights Reserved.
4 iDS-9632NXI-I8/16S(B) A: the area into the detection area; B: the area outside the detection area; S: the sensitivity When A/(A+B)>(100-S)%, the alarm will be trigged. For example, if the sensitivity is set to 100, once the target touch the line, the alarm will be triggered. If the sensitivity is set to 80, only when 20% of the target crossing the line, the alarm will be triggered. The default sensitivity is 50. 2) Time threshold: The time during the target reaching the sensitivity.
5 iDS-9632NXI-I8/16S(B) In order to make the whole system more accurate, there’re some mounting and rule requirements for IP cameras. In this chapter, we take several typical scenarios as examples to help you setup a better perimeter system. (1) IP camera installation Camera is recommended to be installed 2-3 meters high in doors. If it is installed outside, it should be 3-8m high. If there is fence, the installation height must be higher than the fence.
6 iDS-9632NXI-I8/16S(B) For example, the target in picture below is too large to detect, the man almost covers the whole scene. We suggest adjusting the angle higher so that IP camera can start detecing from a longer distance. (4) Influence factors 1) Illumination It’s easy to deduce that once the scene is too dark, IP camera or NVR can’t detect target exactly. Lighting supplement or low light cameras is recommended in scene below. © Hikvision Digital Technology Co., Ltd. All Rights Reserved.
7 iDS-9632NXI-I8/16S(B) 2) Obstacle If there’re obstacles in front of the camera, there will be c false alarms which occupy NVR smart resources. In addition, large obstacle might block target you are really interested in. Scene in picture below is not an appropriate one for detecting. 3) Strong light In some scenarios, strong light interference makes a target hard to be detected. Strong light generally can be divided into two kinds: strong background light and strong foreground light.
8 iDS-9632NXI-I8/16S(B) Strong foreground light is usually generated by sudden light intensity change such as car light, flash light, sunshine reflection. We suggest customer change IP camera’s angle to avoid strong light or use cameras with HLC function. 4) Complex scene We suggest customer use perimeter guarding alarm to detect human who is not supposed to enter a region or cross a line, so it’s not applicable in a scenario such as train station with large people flow.
9 iDS-9632NXI-I8/16S(B) recommended customer set detection rule in the center of the scene, or not near the scene’s edge. 6) Rule position Although DeepinMind NVR is able to filter false alarms created by leaves, animals etc, it is highly recommended to set rule in a static field/ object. One customer set line crossing rule on grass in scene below, grass continuously makes false alarms which occupy NVR smart resource and storage space.
10 iDS-9632NXI- I8/16S(B) (6) IP camera selection If customer wants to use smart detection in an indoor environment, IP camera with WDR and wide FOV is recommended. In some outdoor scenarios, bullet camera are a better choice than dome camera. Some raindrops might be stuck to the surface of dome camera, with raindrops accumulated, it decreases accuracy of smart detection. Here’re several modes we recommend for outdoor/indoor use, customer can also select by themselves according to actual scenario.
11 iDS-9632NXI- I8/16S(B) 2 series 4 series DS-2CD21x5 series DS-2CD2Tx5 series DS-2CD23x5 series DS-2CD26x5 series DS-2CD4Cx6 series DS-2CD4Bx6 series DS-2CD4Dx6 series DS-2CD4Dx6 series First Choice for Security Professionals Hikvision Technical Support © Hikvision Digital Technology Co., Ltd. All Rights Reserved.
