Face detection with temperature control works properly if cameras are installed and set up as follows:

1. At least 8 frames per second.
2. Minimum resolution is at least 1280 х 960 pixels.
3. Indoor installation only.
4. To establish maximum measurement accuracy, avoid installing cameras near exits to street, in direct sunlight, and close to HVAC outlets.
5. Keep the distance from camera to the subject of measurement within the range of 1-2 meters.
6. For best accuracy, install the Electromagnetic Radiation Absorber (BB) at the same distance from camera as the subjects of measurement.
7. The maximum angle of incidence should not exceed +/- 15° off the ground level.
8. Distance between pupils on the received photos of face must be not less than 32 pixels.
9. There should be minimum mutual overshadowing of the captured faces.
10. The faces should be evenly illuminated with a diffused light of at least 200 lux. Directional side lighting is not allowed.
11. The sharpness of the captured faces on the received photos must be over 64 grayscale. Deficient or exceeding illumination is not allowed.
12. There should be no back light and sharp gradients of light and shade.

13. The photos of the captured faces received from video cameras should be clear. Image blurring caused by motion is not allowed.

    The required distance between the camera and the face can be set using a lens with required focal length.