The basic principle for the selection of surveillance cameras shall be to meet the actual business application, and the types of cameras shall be selected scientifically and reasonably in combination with the specific conditions of the monitoring project site and the target range.

1. HD cameras should be used in places with high incidence of cases, complex public places, key sensitive areas prone to mass incidents, main road sections, crowded areas and important security targets;

2. In key parts, around key units, parks, squares, scenic spots and traffic sections, if it is necessary to monitor a wide range of areas and the overall scene, and to identify personnel facial features, vehicle license plates and local site conditions through lens zoom and PTZ control, high-speed fast ball cameras or PTZ guns should be used;

3. In areas such as back streets and alleys, deviated sections and public security blind areas, where there are few personnel and vehicles, and there are many parts and angles that need to be monitored at the same time, intelligent fast ball cameras with preset point cruise, pattern scanning and other functions should be used;

4. For the monitoring points with poor ambient lighting conditions at night and not suitable for incandescent light supplement, infrared cameras or star cameras should be used.