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For recognition it is necessary to make sure that frames with number plates fulfill the following characteristics:

• for analog cameras the height of the symbols in the frame is to be not less than 14-20 px; 
• for IP cameras the height of the symbols in the frame is to be 15 px, stroke width is not less than 2px20-30 px;
• minimum allowed contrast with evenly dirty number plate should not be less than 10% ) contrast differentiation of symbols to the background is 25 on 256 point scale);
• maximum allowed uneven dirtiness is not more than 12% (ratio of the dirty area of the number plate to its whole area);
• geometrical proportions of the number plate picture should not differ from such proportions of the number plate itself with more than 10%.

Procedure of video cameras setup and mounting for the VIT software module is presented in the vendor documentation.

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