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1. Securityspy dahua unable to deterimine image size how to#
2. Securityspy dahua unable to deterimine image size install#
3. Securityspy dahua unable to deterimine image size pro#
4. Securityspy dahua unable to deterimine image size verification#
5. Securityspy dahua unable to deterimine image size software#

An IP security camera usually has a frame rate of twelve to twenty frames per second – not thirty to sixty – but many security manufacturers call their 8MP cameras “4K” simply because either the total pixels are eight million, or the sensor array is 3840 x 2160. It wouldn’t necessarily have to be 3840 x 2160, but many times it is. Technically an 8MP camera could mean any pixel array that equals around eight million pixels. The actual total number of pixels of a 4K sensor would normally be about 8.3MP. The term “4K” originated in broadcast television to refer to 3840 x 2160 resolution at thirty or sixty frames per second.

Securityspy dahua unable to deterimine image size how to#

Now that you know how to calculate resolution, find out how to pick the best lens for your installations.Ī side note when discussing high-megapixel cameras: the technical differences between 4K and 8MP are so minute that the two are effectively interchangeable, as far as security installations are concerned. In this way, you can meet your customer’s viewing requirements while ensuring they’re not overpaying for equipment. Using these calculations and specifications, you will have confidence that your security camera will cover the area you need to monitor at the level of detail required for that location. Perhaps you only need a high-megapixel camera at the entrance of the location, to accurately identify people’s faces, and can use lower-megapixel cameras to monitor activity.

Securityspy dahua unable to deterimine image size install#

Dahua’s FOV calculator makes it easy to include install angle and focal length in your calculation as well.īefore rushing to install a higher-megapixel camera, consider the scope of the entire surveillance system. Environmental and weather conditions should be considered as well. Remember that other factors – such as lens, lighting, compression, and camera placement – impact the clarity of the image. For example, a 4-megapixel camera with 2,688 horizontal pixels used to cover a loading dock with a 100-foot FOV, pixel density would be approximately 27 PPF. Simply divide the horizontal pixels of the camera resolution by the Field Of View in feet (FOV) of the observed scene. Now that you know how many PPF you need, it’s time to calculate pixel density. The identification level enables the identity of an individual beyond a reasonable doubt. The recognition level determines with a high degree of certainty whether an individual shown is the same as someone that has been seen before. The observation level gives characteristic details of an individual, such as distinctive clothing, while allowing a view of activity surrounding an incident.

The detection level allows for reliable and easy determination of whether a person or vehicle is present.

Securityspy dahua unable to deterimine image size verification#

What level of detail does the security application require? Detection of a person? Verification of activity? Positive ID of a stranger? DORI (Detection, Observation, Recognition, Identification) is championed by the British Security Industry Association and Department of Homeland Security to delineate categories of identifiable information. Here are three quick steps to make sure your video surveillance system is capturing the needed detail in a scene, without incorporating pricey high-megapixel cameras your customer doesn’t necessarily need.

Securityspy dahua unable to deterimine image size software#

Video Management System / Software Maximizing security and enhancing operational efficiency to your video and access control products that allow for control, storage, and live video feed.Switches Dahua offers a complete line of unmanaged and managed switches to cover a wide variety of applications.Video Intercom From multi-tenant apartments, and commercial buildings to residential, we offer an extensive selection of video intercom solutions to accommodate all project sizes.Access Control Ensuring premises are secure at all times, Dahua’s access control portfolio provides the latest in premise protection from card readers to biometric readers.

HDCVI Products Dahua HDCVI in-house patented technology extends the life of legacy infrastructure with up to 4K resolution.

Securityspy dahua unable to deterimine image size pro#