This document contains definitions and descriptions of various camera functions and technologies including: - WDR and DNR which improve image quality in high contrast and low light situations. - BLC, defog, corridor mode, smart IR, and ROI which enhance image clarity and focus on specific areas or scenes. - EIS, SVC, tripwire detection, intrusion detection, abandoned/missing object detection, and scene change detection which provide image stabilization and alarm triggering capabilities. - Face detection, audio detection, ICR, multi-streaming, and ONVIF compliance which enable additional intelligent functions and interoperability. - AWB and AGC which automatically adjust color balance and brightness for optimal

1. WDR
DNR
BLC
Defog
Corridor mode
Smart IR
ROI
EIS
SVC
Tripwire detection
Intrusion detection
Abandoned
Missing
Scene change
Defocus detection
Face detection
Audio detection
IP66/IP67
ICR
Multi-streaming
ONVIF
AWB
AGC
Table of contents

2. WDR (Wide Dynamic Range)
WDR is intended to provide clear images even under backlighting, A camera placed on the inside of the room will be able to see through the intense sunlight or artificial light coming in. If an indoor security camera is pointed towards a window or an entrance door, you will not be able to see the subject in side because the background is to bright. This is a common occurrence in restaurants and stores with large glass windows.
WDR off
WDR on

3. DNR (Digital Noise Reduction)
Image noise is interference in the video signal that shows up as grainy specks. It can be caused by low lighting situations, a nearby power interference, heat, or device algorithms.
DNR is a technique of removing image noise from a video signal by applying a digital comb filter. It makes images clearer and reduces video file size.
A 2D filter reduces the noise that can be found in low light images. This type of filter is sometimes confused by motion, resulting in blur trails.
A 3D filter goes one step farther and effectively reduces the noise in static images and images with movement.

4. BLC (Back Light Compensation)
In images where a bright light source is behind the subject of interest, the subject would normally appear in silhouette. BLC allows the camera to adjust the exposure of the entire image to properly expose the subject in the foreground. WDR is a more effective alternative to BLC because it handles multiple exposure zones to give both the highlight and low light areas a proper exposure.
BLC off
BLC on

5. Defog
Defog off
Defog on
Defog is the new technology to make the image clear in a foggy environment with the newest image processing techniques ,by using the new algorithmic ,it can greatly enhance the contrast of the image and make it as normal day’s

6. Corridor mode
expand the view in vertical direction instead of horizontal direction
Support 9:16 image ratio , suit for corridor monitoring and some tunnel environment

7. Smart IR
In some case of misjudging the length of IR range and subjects, IR cameras lead to frequently over-exposed subjects. That’s why smart IR is there to solve this type of issue by adjusting automatically IR light and based on subject’s distance, resulting in a clear image that is not washed out or too dark.
Smart IR off
Smart IR on

8. ROI (Region of interest)
ROI off
ROI on
In some cases, not the whole region of the picture is important , by using the ROI technology you are able to choose a region that is more important ,and the camera will make that region more clear even in the low bitrate . It saves the storage usage without sacrifice the resolution of the important part of the video

9. EIS (Electrical Image Stabilizer)
Electrical image stabilization (EIS) compares video data from recorded images to detect shaking camera movement, most often from wind ,The camera creates a pixel buffer by recording extra pixels outside of the visible frame. When the camera vibrates or shakes, the camera shifts the visible frame to reduce the jarring effect on the video image
EIS off
EIS on

10. SVC (Scalable Video Coding)
Co-working with NVR support SVC decode, the stream or record can be further compressed by dropping frame, saving 75% storage usage and reduce 75% transport pressure at most.
Benefits:
• Better network compatibility, protect the data from losing in a bad network
• NVR can replay in a low bitrate, saving the resource of network
• To a SVC stream, get a 30fps stream for preview while get a 15fps stream for record.

11. Tripwire detection
Alarm status
Normal status
By drawing a line in the screen, anything that cross the virtual line you have drawn will trigger the alarm, and capture a picture ,it is suitable for the road or some important entrance

12. Intrusion detection
Alarm status
Normal status
By drawing a closed region in the screen, anything that break into that region you have drawn will trigger the alarm, and capture a picture ,it is suitable for the road , some important entrance or bus station ,train station , etc

13. Abandoned
Abandoned object detection
By drawing a closed region in the screen, anything that abandoned in that region will trigger the alarm, and capture a picture ,it is suitable for the road , some important entrance or bus station ,train station , etc

14. Missing
Missing object detection
By drawing a closed region in the screen, anything that missing from the region will trigger the alarm, and capture a picture ,it is suitable for the road , some important entrance or bus station ,train station , etc

15. Scene change
Scene 1
Scene 2
When the scene is changed (it happens when the camera is removed or covered by something else ) then the alarm will be triggered and the picture will be capatured

16. Defocus detection
Defocus detection
When the lens is not focus on the subject , as showed in scene 1 ,then the camera will auto adjust the lens to focus on it ,showed in scene 2
Scene 1
Scene 2

17. Face detection
Face detection
The camera will auto recognize the human face appeared in the scene

18. Audio detection
• Input abnormal detect
• Audio intensity change detect

19. IP66/IP67
In most cases, the Ingress Protection Rating consists of the letters IP followed by two digits.
I P [Solid Particle Protection] [Liquid Ingress Protection]

20. IP66/IP67
I P [Solid Particle Protection] [Liquid Ingress Protection]

21. ICR (Infrared Cut filter Removal)
The IR cut filter is on when the camera is operating as a color camera for precise color reproduction. With ICR, the filter is removed which allows for much greater light sensitivity in monochrome mode.
Day / ICR OFF
Night / ICR ON

22. Multi-streaming
Multi-streaming means that your device outputs two or more types of video streams, with different properties, to different users or devices. It allows a user to get video in a different resolution, frame rate, or compression type to meet requirements of quality, storage constraints, bandwidth, or CPU usage.
The property differences could be
•Compression type (such as H.264 and MPEG-4)
•Resolution (to reduce bandwidth needs)
•Frame rate (to supply appropriate-sized video to devices like smart phones without reducing resolution)

23. ONVIF (Open Standard Compliance)
ONVIF is an open industry forum for the development of a global standard for the interface of IP-based physical security products. The ONVIF specification will ensure interoperability between products regardless of manufacturer.
linovision's IP cameras are fully compliant with the ONVIF standard, ensuring compatibility with software and hardware from over 200 companies like Sony, Panasonic, Samsung, and Cisco.
•Increased flexibility and greater freedom of choice. The standard enables end users to select interoperable products from a variety of different brands that comply with the ONVIF standard
•Future-proof systems and more secure investments. The standard will ensure that interoperable products are available from a large variety of vendors, no matter how the market develops
•Reduced total cost of ownership. Interoperable products result in less integration costs, and enable end-users to choose the most suitable combination of IP-based physical security products for their specific needs, regardless of

24. AWB (Automatic White Balance)
Color temperature is directly related to environment and it influences on the color of image. AWB automatically adjusts the white balance in response to varying light conditions to reproduce accurate color without any color-cast caused by different lighting source (ex. Incandescent, fluorescent and quartz light).
Without AWB
With AWB

25. AGC (Automatic Gain Control)
It’s a form of amplification where the camera will automatically boost the image received in much lower light conditions than standard in order to optimize the clarity of image in poor lit scene.
Without AGC
With AGC