Surveillance camera installation basic knowledge + fill light installation skills

by:Keyable     2021-08-06
Surveillance camera installation basic knowledge + fill light installation skills 1. Camera installation Camera installation height: the camera is usually 1.8 meters-2.3 meters high, the best installation position during the installation of the camera is that the camera is parallel to the collected face, or higher; Keep the tilt angle not too large. The success rate of face collection and the comparison and recognition rate will greatly improve the installation of cameras in Chengdu.   Camera installation tilt angle: The camera installation tilt angle should not be too large, the maximum tilt angle is 45 degrees, and the tilt angle is 0 degrees for the best effect. Camera installation lighting problem: The camera installation position should be adjusted appropriately according to the light and lighting conditions; if the camera is installed behind the light, when the person walks to the effective collection distance of the camera, the light can effectively illuminate the face. There will be no yin and yang faces (half of the face is dark, half of the face is bright), and the human face cannot be seen clearly. The collected photos can be better recognized than the installation of the Chengdu camera.  The direction of the influence of illumination on the face is: toward light, backlight, side light, etc.; the camera installation position needs to be based on the direction of the face toward the light to install the camera, and the human image can be collected to better capture or identify and compare. Light: the face is facing the light or the direction of the light;    backlight: the face is facing away from the light or the direction of the light;    side light: the light on the left and right sides of the face, the light is higher than the front and back light intensity;    camera installation environment: as a camera for portrait recognition, Collection and recognition of portraits need to be carried out in a relatively constant environment; therefore, the camera is installed indoors compared to the installation of the camera in an outdoor environment that is not constant. The effect of capturing and recognizing portraits is better; it is recommended that the camera be installed indoors or in a covered environment. Install.   Other precautions for camera installation: The quality of the lens has a relatively obvious impact on portrait collection and recognition. The better the lens, the farther the focal length, the smaller the tilt angle. 2. Installation height of the fill light: There is no accurate standard for the installation height of the fill light. The fill light installation is basically lower than the camera. Install the fill light below the camera or install the fill light at the left and right ends of the camera; it can also be installed. In a position parallel to the human face; specifically, the fill light can be installed according to the situation of the on-site camera, and the position of the fill light and the brightness of the fill light can be fine-tuned on the basis of it.  The installation tilt angle of the fill light: the tilt angle of the fill light is adjusted according to the camera installation position and the inclination angle of the face collection. Due to the difference of the height of the personnel, the angle can be adjusted according to the situation of the public.  The installation environment of the supplementary light: The installation environment of the supplementary light is actually to understand the conditions under which the supplementary light needs to be installed. One is that when there is no light or light, the environment is more demanding, and the probability of occurrence is relatively small. It is more reasonable to install supplementary lights in such an environment than to install some lights directly;    Second, install under dim lighting The fill light can allow the camera to better capture, recognize and compare human faces;    The third is that the camera is installed at a predetermined location, and when the face is backlit, the fill light can be installed so that the captured portrait will not be blurred due to the backlight. Unclear and so on. Other precautions for the installation of the fill light: The mood of the past personnel needs to be considered during the installation of the fill light. It is best not to direct the eyes of the fill light, and the light intensity should not be too strong, so as to prevent the customer from covering the face with their hands and affecting the collection. Camera installation.
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