The camera technical specifications which are necessary for the correct operation of the STC recognition module are listed in the table below:
| Camera specifications | - Color camera with resolution: 2 million pixels (1080p), minimum: 720p, maximum 4K.
- CCD / CMOS: 1/1.8 or higher.
- H.264 and RTSP support.
- The maximum encoding speed should be at least 4 Mbps.
- Guaranteed image quality in low light conditions.
- The frame rate should be not less than 12 fps, and not less than 6 fps for face recognition at turnstiles.
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| Video image | - The sharpness of the captured faces on the received photos should be not less than 64 grayscale. Deficient or exceeding illumination is not allowed.
- There should be no back light and sharp gradients of light and shade.
- The faces should be evenly illuminated with a diffused light of at least 200 lux. Directional side lighting is not allowed.
- The photos of the captured faces received from video cameras should be clear. Image blurring caused by motion is not allowed.
- The maximum deviation of the face in the camera FoV from the face-forward position should not exceed 70 degrees.
- The distance between pupils on the received photos of the captured face should be not less than 50 pixels.
- There should be minimum mutual overshadowing of the captured faces.
- The face width should be at least 1/16 of the image width, or the face height should be at least 1/16 of the image height.
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| Camera positioning | - The required distance between the camera and the face can be set using a lens with required focal length.
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