What Is DORI Distance and How Does It Apply To Amcrest Cameras?

DORI stands for Detection, Observation, Recognition, and Identification. It is a standard (IEC EN62676-4: 2015 International Standard) used in the security industry to define the level of detail that a camera can provide at a given distance. This information can be used to help you choose the right camera for your needs. These details can be found and are calculated on the specs sheet based on the sensor specification and lab results (62676-4) of the device. For more information on these details please refer to the information provided below. 

Lens: Provides the focal length of the camera. The focal length is the distance between the optical center of the lens or mirror and the point where parallel rays of light converge or diverge. Focal length is typically measured in millimeters (mm). For instance, most Amcrest cameras have a 2.8mm lens which provides a wide-angle lens for capturing large areas. 

Detect: Provides the maximum distance in which an object, such as a human or vehicle can be detected. Please note, this does not take into affect more detailed aspects such as facial features or license plate numbers. 

Observe: This field provides the maximum distance in which an object can be observed by the camera. For instance, the distance that will allow you to see things like distinctive clothing or the make and model of a vehicle.

Recognize: Provides the maximum distance in which the camera can recognize individuals or similar objects with a high degree of certainty. This means that you should be able to tell who someone is, even if they are not looking directly at the camera at this level. 

Identify: This field provides the maximum distance in which the camera can identify individuals with a high degree of certainty, even if they are partially obscured or wearing a disguise.

Note: DORI details are based on ideal lighting conditions. If you are going to be using the camera in low-light conditions, you will need to choose a camera with a higher DORI rating.

Here is a table that summarizes the DORI ratings for different levels of detail:

Level of detail DORI Rating (PPM) DORI Rating (PPM) Maximum Distance
Detection 25 100 feet
Observation 62 50 feet
Recognition 125 20 feet
Identification 250 10 feet

Additional Factors to Consider

In addition to the DORI rating, there are a few other factors to consider when choosing a camera:

Resolution: The resolution of a camera is measured in pixels. The higher the resolution, the more detail the camera will be able to capture.
Frame rate: The frame rate of a camera is measured in frames per second (FPS). The higher the frame rate, the smoother the video will be.
Field of view: The field of view of a camera is the angle that it can see. The wider the field of view, the more area the camera will be able to cover.

In conclusion, DORI is a valuable tool that can help you choose the right type of camera for your needs. By considering the factors of detection, observation, recognition, and identification, you can ensure that you get a camera that can provide the level of detail that you need.

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