Why the DORI standard is a good starting point for designing video surveillance systems

The DORI standard – what is it? And why is it useful for designing video survelliance systems? Uri Guterman, Head of Product & Marketing for Hanwha Techwin Europe, explains how utilising the Detection, Observation, Recognition and Identification (DORI) standard as the starting point for system design can ensure specified cameras are able to cost-effectively meet end-user’s expectations.

The quality of images captured by many of the latest generations of super-high definition video surveillance cameras allow users to see ultra-sharp detail of objects and people within the field of view.

The resolution capabilities of 4K and 8K cameras enables operators to digitally zoom on a very small part of a scene, making them an ideal solution for large open area applications where installing multiple cameras may be impractical or cost prohibitive.

The deployment of ultra-high resolution cameras however, comes at a cost.

All ultra-high resolution cameras capture large file size images which, when transmitted over the network, consume large amounts of bandwidth. They also have large data storage requirements.

Some manufacturers, such as Hanwha Techwin, have developed proprietary compression technologies which, when working in conjunction with H.265 compression, are able to reduce bandwidth and storage demands by up to 80%.

DORI standard

Whilst many system integrators will be familiar with DORI, installers who are relatively new to the world of video surveillance may not know that the IEC EN62676-4 international standard provides time saving guidance as to which cameras should be specified. So, for those who are not familiar with the standard, here is a jargon busting overview of what the DORI acronym stands for.

• Detection: The quality of images captured by a camera allows a user to determine whether a person or vehicle is present.
• Observation: The captured images are able to provide characteristic details of an individual, such as their clothing.
• Recognition: The clarity of the images enables operators to see with a high level of certainty that an object or incident is the same as the one that an operator has seen before, e.g. it is a person, vehicle or a fire.
• Identification: The resolution and quality of the images enable an individual to be identified beyond reasonable doubt.

Usin DORI as a guide for designing a new video surveillance solution will ensure you do not waste money by over specifying the cameras needed for the job in hand. Equally important, the reverse also applies, in that the DORI standard will help you avoid experiencing ‘buyers’ remorse’ as a result of installing cameras which are not fit for purpose.

It is important to bear in mind that, DORI is a guide, on its own, it is not going to choose the perfect camera for every individual. Other requirements need to be taken into consideration, such as if the camera will need a built-in IR illumination, or have sufficient WDR functionality.

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