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Requirements for the operation of the License plate recognition IV and its sub-detectors are given in the table:
Camera requirements
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- video resolution is 640*480,
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- recommended resolution is 720p or 1080p
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- Minimum frame rate is 15 FPS,
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- recommended frame rate is 25–30 FPS
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- Autofocus and zoom would be useful for making small adjustments after configuring the
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- detector
- IR for night mode with good contrast of license plate images
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- In order to recognize state license plates on high-speed roads, the camera
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- must have the Global Shutter mode
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Video requirements
- The video image should be clear, contrasting, without distortion, not blurred.
- The video image should have minimum noise in low light conditions.
- The size of the license plate should be 15–70% of the total size of the image.
- The license plate must contain no more than two rows of characters.
Camera installation requirements
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| Correct operation of the detector isn't guaranteed if you use frames that were masked before they got into Axxon One by an IP camera or similar methods. |
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| Lighting | - Lighting in the scene is at least 50 lux. In conditions of insufficient or excessive lighting (night or light-striking), stable operation of the analytics isn't guaranteed
- No abrupt changes in lighting
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Scene and camera angle | |
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- be mounted at 0.6–2.4 meters above the ground
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- Angle formed by the lower line of the license plate and the horizon line
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- must be from 0 to 20 degrees
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