- The IRISYS approach to people counting employs the unique advantages of thermal based detectors
- Thermal based detectors have a number of significant advantages over the more traditional video based systems, leading to more accurate, consistent and reliable people counting
- The table below highlights the core advantages of thermal detectors over video based systems
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IRISYS thermal based counter
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Video based systems
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No privacy or security issues because no image is taken
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Potential privacy and security issues with the taking of video images
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Unaffected by ambient light levels - functions well in a wide variety of conditions from darkness to bright light
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Often very sensitive to lighting levels, causing variable counts and will not function below a certain ambient light level
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Works by detecting emission from a moving target which means background features are completely ignored
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Sensitive to changes in image background, such as floor colour and other background features, which can cause miscounts
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Shadows are not detected and therefore do not affect count accuracy
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Shadows from people may cause miscounts
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Typical power consumption 1W
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Typical power consumption 5W
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Largely unaffected by dirt and dust on lenses which may build up in some environments. Cleaning not required
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Dust and dirt on lenses can affect the visual wavelengths used in video based systems, causing reduced sensitivity. Periodic cleaning my be required
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MTBF is >25 years
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MTBF generally <10 years
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Better accuracy at high volumes
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Inaccurate in very high volumes
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In addition to the core advantages of a thermal based device, the IRISYS approach also has a number of other core advantages over video based counting systems
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IRISYS thermal based counter
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Video based systems
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‘Master and node’ configuration provides more accurate counting on wide entrances
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Most video is 'stand alone' and does not couple well together to cover wide entrances
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Thermal counter available as IP, relay pulsing and CAN versions, giving much greater flexibility for different installation situations
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Most video does not have this flexibility
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Quick set up and configuration
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Often require time consuming setup and calibration
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Secure data channel via encrypted data feeds.
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Most video does not have this flexibility
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