Consider DORI when choosing your CCTV cameras - What is DORI?
The DORI standard is a crucial concept in CCTV design, providing a clear framework for evaluating the performance of surveillance cameras, it is based on European standard - EN 62676-4 and is there to give a clear indication of what to expect from a camera interms of its view.
DORI stands for Detection, Observation, Recognition, and Identification. Here’s a detailed breakdown:
Detection
The ability to detect the presence of an object or person. At this level, the goal is simply to notice that something is there, without needing to see details. For example, you can detect movement in a large area.
Observation
The ability to observe characteristic details. This level allows you to determine what the object is, such as distinguishing between a person and a vehicle. You can see general activities and characteristics, like clothing or vehicle type.
Recognition
The ability to recognize what or who the object is. At this stage, you can identify specific features or characteristics, such as recognizing a familiar face or the make and model of a car.
Identification
The highest level of detail, where you can identify an individual person or read a still license plate clearly. This level allows for precise identification, such as confirming someone’s identity or reading small text.
Why is DORI Important?
DORI helps the installer to identify what a CCTV camera can achieve at various distances, helping to make sure the correct camera is selected for the users needs. By using the data provided you can ensure that selected cameras meet security requirements, such as using detection-level cameras for large open areas and identification-level cameras for entrances and exits.
How is DORI Measured?
The DORI standard is measured in terms of the number of pixels per meter (px/m) that a camera can achieve at specific distances, see the table below. For DORI measurements on a per camera basis check the cameras spec sheet for a DORI section.
Detect | Observe | Recognise | Identify |
---|---|---|---|
25px/m | 63px/m | 125px/m | 250px/m |
Manufacturers often display the minimum DORI results on their camera datasheets. This helps users quickly determine if a camera will meet their needs. For example, a 4MP Hikvision hybrid camera with a 2.8mm lens has the following DORI distances:
- Detect: 61 meters
- Observe: 24 meters
- Recognize: 12 meters
- Identify: 6 meters
By understanding these specifications, you can choose the most suitable camera for your specific requirements.
If you have any more questions regarding DORI or need further assistance with a specific product, please contact us