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Requirements for the operation of the License Plate Recognition IV and its sub-tools are given in the table, it is necessary to install and configure the cameras to meet the following requirements:
| Camera | - Minimum video resolution is 640*480, recommended resolution is 720p or 1080p
- Minimum frame rate is 15 FPS, recommended frame rate is 25–30 FPS
- Autofocus and zoom would be useful for making small adjustments after configuring the detection tool
- IR for night mode with good contrast of license plate images
- HDR or WDR
- In order to recognize state license plates on high-speed roads, the camera must have the Global Shutter mode
| Note |
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| Correct operation of the detection tool 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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| Video | - Video image must be clear, contrasting, without distortion, not blurred
- Video image must have minimum noise in low light conditions
- Size of the license plate must be 15–70% of the total size of the image
- License plate must contain no more than two rows of characters
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Camera installation | Video camera | 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 | - Camera must be mounted at 0.6–2.4 meters above the ground
- Angle formed by the lower line of the license plate and the horizon line must be from 0 to 20 degrees
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