1. What if the camera has no image?
A: First, confirm whether the power of the camera is added. Usually it can be judged by the indicator light. The second is whether the monitor is normal. For example, whether to switch to the corresponding input channel. Third, whether the coaxial cable is normally in compliance with the contact. The fourth is whether the lens aperture is open. If it is for other reasons, you need to return to the factory for repair.
2.What to do if the camera image is whitish?
A: First of all, check if you are aiming at a place where the light is strong. If it is a manual iris lens, see if the aperture is too large. If it is an auto iris lens, check if the correction value is too low and make the iris open too large. Next, check whether the exposure setting of the camera is correct and whether the speed of the electronic shutter is too slow. If it is for other reasons, you need to return to the factory for repair.
3. What to do if the camera image color cast?
A: Generally, the white balance setting improves the color cast: There are two ways to set the white balance:
A, automatic white balance, continuous mode - this time the white balance setting will be continuously adjusted with the change of the color temperature of the scene, the range is 2800~6000K. This method is most suitable for situations where the color temperature of the scene is constantly changing during shooting, so that the color is natural, but continuous white balance cannot produce the best color effect when there is little or no white in the scene. Button mode - first aim the camera at a white target such as white wall, white paper, and then switch the automatic mode switch from manual to set position, keep it in this position for a few seconds or until the image appears white, in white balance After being executed, the automatic mode switch is switched back to the manual position to lock the white balance setting. At this time, the white balance setting will remain in the camera's memory until the execution is changed again. The range is from 2300 to 10000 K. During this period, this setting will not be lost even if the camera is powered off. Setting the white balance by buttons is the most accurate and reliable, suitable for most applications.
B. Manual white balance. Manual white balance will turn off the automatic white balance. At this time, there are as many as 107 levels for changing the red or blue state of the image. For example, increase or decrease the red level, increase or decrease the blue level. One grade. In addition to time, some cameras have white balance fixed at 3200K (incandescent level) and 5500K (daylight level) and other grade commands.
4. How to choose the camera lens?
Answer: (1) The imaging size of the lens should be consistent with the camera CCD target surface size, as mentioned above, 1/2 inch, 1/3 inch, 1/4 inch and other specifications.
(2) The focal length of the lens and the viewing angle, first according to the distance from the camera to the monitored target, the focal length of the lens is selected, after the lens focal length f is determined, the camera's target surface determines the visual field.
(3) The amount of light passing through the aperture or through-the-lens lens is measured by the ratio of the focal length and the clear aperture of the lens. The mark F is used. Each lens is marked with its maximum F value. The amount of light transmitted is inversely proportional to the square of the F value. The smaller the F value, the larger the aperture. Therefore, whether to use a manual iris or an auto iris lens should be selected based on the degree of light changes in the monitored part.
5. How to calculate the focal length of the lens?
A: Formula calculation: The calculation of the field of view and focal length. The field of view refers to the size of the object being captured. The size of the field of view is determined by the distance from the lens to the object being captured, the focal point of the lens, and the required imaging size. The focal length of the lens, the size of the field of view, and the distance from the lens to the object being taken are calculated as follows; 1, f = wL/W, f = hL/H
f: Lens focal length w: the width of the image (image width of the subject on the ccd target surface)
W: Width of the subject L: Distance from the subject to the lens h: Image height (The subject is in cc
d: Image height on the target surface) Field of view (uptake scene) Height H: Height of the subject
6. What are the common video transmission methods and how much is the transmission distance?
Answer: 1. Coaxial cable (transmission distance 0-600m), 2. Optical fiber (0-20Km or more), 3. Wireless (3G network, or 2G network), 4. Traditional network cable (100m without relay), 5. Twisted pair (0-2400m, divided into active and passive).
7. What are the common video transmission methods and how much is the transmission distance?
A: The angle of infrared light is not consistent with the degree of competition of the lens.
8. What should I do if the speed dome is out of control?
A: 1. Check if the high-speed ball address code is the same as the address code of the control keyboard. 2. Is the baud rate of the communication the same as the control of the keyboard 3. Is the communication protocol the same as the controlled keyboard? 4. Whether the wiring meets the RS485 standard.
9. What is the reason that the network camera cannot display the image?
A: Check whether the power indicator is on first, indicating whether the camera is powered on. 2. If there is a network indicator, see if the indicator is on or flashing. Indicates the network status of the camera. 3. Check whether the client computer network is connected, whether it is in the same subnet as the network camera, and whether it is in the same LAN as the camera. For the computer to provide the basis for the normal connection through the network. 4. Check if the IE control is installed correctly. And allow running controls. 5. The camera aperture is open. It shows that the camera image CCD can normally capture the light that the outside world injects into the lens. 6. The camera color and brightness settings are reasonable.
10. What is the problem with camera image blur?
A: If the camera lens is not focused, you can adjust the back focus of the camera so that the camera image is clear.
A: First, confirm whether the power of the camera is added. Usually it can be judged by the indicator light. The second is whether the monitor is normal. For example, whether to switch to the corresponding input channel. Third, whether the coaxial cable is normally in compliance with the contact. The fourth is whether the lens aperture is open. If it is for other reasons, you need to return to the factory for repair.
2.What to do if the camera image is whitish?
A: First of all, check if you are aiming at a place where the light is strong. If it is a manual iris lens, see if the aperture is too large. If it is an auto iris lens, check if the correction value is too low and make the iris open too large. Next, check whether the exposure setting of the camera is correct and whether the speed of the electronic shutter is too slow. If it is for other reasons, you need to return to the factory for repair.
3. What to do if the camera image color cast?
A: Generally, the white balance setting improves the color cast: There are two ways to set the white balance:
A, automatic white balance, continuous mode - this time the white balance setting will be continuously adjusted with the change of the color temperature of the scene, the range is 2800~6000K. This method is most suitable for situations where the color temperature of the scene is constantly changing during shooting, so that the color is natural, but continuous white balance cannot produce the best color effect when there is little or no white in the scene. Button mode - first aim the camera at a white target such as white wall, white paper, and then switch the automatic mode switch from manual to set position, keep it in this position for a few seconds or until the image appears white, in white balance After being executed, the automatic mode switch is switched back to the manual position to lock the white balance setting. At this time, the white balance setting will remain in the camera's memory until the execution is changed again. The range is from 2300 to 10000 K. During this period, this setting will not be lost even if the camera is powered off. Setting the white balance by buttons is the most accurate and reliable, suitable for most applications.
B. Manual white balance. Manual white balance will turn off the automatic white balance. At this time, there are as many as 107 levels for changing the red or blue state of the image. For example, increase or decrease the red level, increase or decrease the blue level. One grade. In addition to time, some cameras have white balance fixed at 3200K (incandescent level) and 5500K (daylight level) and other grade commands.
4. How to choose the camera lens?
Answer: (1) The imaging size of the lens should be consistent with the camera CCD target surface size, as mentioned above, 1/2 inch, 1/3 inch, 1/4 inch and other specifications.
(2) The focal length of the lens and the viewing angle, first according to the distance from the camera to the monitored target, the focal length of the lens is selected, after the lens focal length f is determined, the camera's target surface determines the visual field.
(3) The amount of light passing through the aperture or through-the-lens lens is measured by the ratio of the focal length and the clear aperture of the lens. The mark F is used. Each lens is marked with its maximum F value. The amount of light transmitted is inversely proportional to the square of the F value. The smaller the F value, the larger the aperture. Therefore, whether to use a manual iris or an auto iris lens should be selected based on the degree of light changes in the monitored part.
5. How to calculate the focal length of the lens?
A: Formula calculation: The calculation of the field of view and focal length. The field of view refers to the size of the object being captured. The size of the field of view is determined by the distance from the lens to the object being captured, the focal point of the lens, and the required imaging size. The focal length of the lens, the size of the field of view, and the distance from the lens to the object being taken are calculated as follows; 1, f = wL/W, f = hL/H
f: Lens focal length w: the width of the image (image width of the subject on the ccd target surface)
W: Width of the subject L: Distance from the subject to the lens h: Image height (The subject is in cc
d: Image height on the target surface) Field of view (uptake scene) Height H: Height of the subject
6. What are the common video transmission methods and how much is the transmission distance?
Answer: 1. Coaxial cable (transmission distance 0-600m), 2. Optical fiber (0-20Km or more), 3. Wireless (3G network, or 2G network), 4. Traditional network cable (100m without relay), 5. Twisted pair (0-2400m, divided into active and passive).
7. What are the common video transmission methods and how much is the transmission distance?
A: The angle of infrared light is not consistent with the degree of competition of the lens.
8. What should I do if the speed dome is out of control?
A: 1. Check if the high-speed ball address code is the same as the address code of the control keyboard. 2. Is the baud rate of the communication the same as the control of the keyboard 3. Is the communication protocol the same as the controlled keyboard? 4. Whether the wiring meets the RS485 standard.
9. What is the reason that the network camera cannot display the image?
A: Check whether the power indicator is on first, indicating whether the camera is powered on. 2. If there is a network indicator, see if the indicator is on or flashing. Indicates the network status of the camera. 3. Check whether the client computer network is connected, whether it is in the same subnet as the network camera, and whether it is in the same LAN as the camera. For the computer to provide the basis for the normal connection through the network. 4. Check if the IE control is installed correctly. And allow running controls. 5. The camera aperture is open. It shows that the camera image CCD can normally capture the light that the outside world injects into the lens. 6. The camera color and brightness settings are reasonable.
10. What is the problem with camera image blur?
A: If the camera lens is not focused, you can adjust the back focus of the camera so that the camera image is clear.
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