Shenzhen Big Dipper Scale Co.,Ltd , https://www.bds-balance.com
Surveillance camera installation basics + fill light installation skills
Installation of the camera
1.Camera mounting height
The camera is usually 1.8 meters to 2.3 meters in height. The better installation position during camera installation is that the camera is parallel to or higher than the human face; keep the tilt angle not too large. Greatly improve.
2.Tilt angle of camera installation
The tilt angle of the camera should not be too large. The maximum tilt angle is 45 degrees, and the tilt angle is 0 degrees.
3. Camera installation lighting problem
The camera installation position should be appropriately adjusted according to the lighting and lighting conditions; if the camera is installed on the back of the light, when the person walks to the effective collection distance of the camera, the light can be effectively irradiated on the face, and the face will not appear yin and yang (Half face dark, half face bright), can not see the human face, etc., the collected photos can better identify and compare.
The impact direction of light on the human face is: direct light, back light, side light, etc .; the camera installation position needs to be based on the human face to the light direction to install the camera, to collect portraits can better capture or identify comparison.
Directional light: the face of a person faces the direction of light or light;
Backlighting: the face of the person is facing away from the light or light;
Side light: the light on the left and right sides of the face, the light intensity is higher than the front and back light;
4. Camera installation environment
As a camera for portrait recognition, capturing and recognizing portraits need to be performed in a relatively constant environment; therefore, cameras installed indoors are better than cameras in outdoor environments where capturing and recognizing portraits are better; it is recommended that cameras be installed indoors or covered Hood environment.
5.Other precautions for camera installation
Lens: 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.
Installation of fill light
1.Installation height of fill light
There is no accurate standard for the height of the fill light. The fill light installation is basically lower than the camera. It is installed below the camera or at the left and right ends of the camera. It can also be installed parallel to the human face. To install the fill light, based on it, fine-tune the position of the fill light and the brightness of the fill light.
2.Tilt angle of fill light installation
The inclination angle of the fill light installation is adjusted according to the camera installation position and the inclination angle of the face collection. Due to the difference in personnel height, the angle can be adjusted according to the situation of the public speaking.
3.Installation environment of fill light
The installation environment of the fill light is actually to understand the conditions under which the fill light needs to be installed.
First, in the absence of light or lighting, this environment is harsh and the chances of appearing are relatively small. It is not reasonable to install some fill lights directly in such an environment;
Second, when the light is relatively dim, installing a fill light can allow the camera to better capture and identify the face;
The third is that the camera installation position is fixed. When the face is backlit, installing a fill light can prevent the captured portrait from being blurred or unclear due to the backlight.
4.Other matters needing attention in the installation of fill light
During the installation of the supplementary light, the emotions of the people in the past must be taken into consideration. Do not direct the supplementary light directly to the eyes of the personnel. The intensity of the light should not be too strong, so as to prevent customers from covering the face with their hands and affecting the collection.