7 common camera image blur reasons and solutions

This article introduces the common causes and solutions of 7 kinds of camera image blur, let's take a look with Xiaobian:

Problem phenomenon 1: normal during the day, and the whole evening becomes blurred

The cause of the problem: In the above two sets of pictures, the focal length and focus position of the camera have not changed, but the aperture is small during the day and the depth of field is large, and the aperture is large at night and the depth of field is small. The focus position is clear during the day, and it may fall outside the depth of field at night. This phenomenon occurs because the aperture is caused by changes in the aperture, so this problem generally occurs on automatic aperture cameras.

Solution: After setting the camera to manual (electronic) iris, adjust the lens to focus clearly. After focusing clearly, return the camera to "auto iris" mode.

Problem phenomenon 2: The image is half clear and half blurred, commonly known as "half pasted "

The cause of the problem: The sensor is not completely level when it is installed in the factory, resulting in a front-to-back distance difference, and the distance difference of only a few millimeters may be displayed as "half-sided".

Solution: To completely solve it, only return it for repair

For the camera with external lens, it can be improved by re-focusing, and the blurred part is distributed to both sides, or the blurred part is adjusted to a relatively insignificant angle, such as a flat surface with a single color.

Problem phenomenon 3: The external lens of the gun machine is adjusted, and the lens focusing knob is adjusted.

The cause of the problem: the external lens of the gun machine, the interface of the camera is CS, and the lens of the CS interface can be normally matched. If the lens interface is C, the C / CS adapter ring needs to be added.

Solution: Confirm the interface type of the camera and lens, and use the adapter ring correctly.

Problem phenomenon 4: The whole image is blurred and the definition is insufficient

The cause of the problem: The image is not obviously blurred, or it is not well-focused, or it is a feeling of overall enlightenment. In this case, it is necessary to consider whether the resolution is insufficient.

1) Standard definition lens is configured for HD network camera

2) The large target lens is used on the small target camera. The larger the lens target surface, the better. If it is not smaller than the camera sensor target surface, try to be as close as possible to the camera sensor target surface.

Solution: The high-definition camera is equipped with a high-definition lens, and the size of the target surface of the lens is not less than the size of the target surface of the camera sensor.

Problem phenomenon 5: The dome camera is normal at a long distance, and the objects at a close distance are not clearly focused and blurred

Cause of the problem: The dome camera is generally monitored from a long distance, so the dome camera has a focus limit by default, and does not focus within the limit.

Solution: According to the specific scene, adjust the distance of the small focus limit of the dome camera

Network dome camera, you can log in to the dome camera on the web, configure, configure, and set a small focus limit in the image.

Simulate the dome camera, enter the dome camera menu, system settings, movement settings, adjust the small focus limit.

Problem phenomenon 6: Partly or completely blurred image on rainy days

The cause of the problem: rainy days or humid air, rain water wets the outside of the glass cover or water droplets condense inside the glass cover, and the image seen through the lens is blurred.

Solution: First distinguish between external wetness and internal fogging. If the outside is wet with rain, it is normal. It will be normal after the weather is clear, or use a device with a wiper function. If it is internally fogged, it is related to the installation and construction. You can check the shield and return the dome camera to the after-sales inspection.

Problem phenomenon 7: Partially blurred image caused by dirty camera cover

The cause of the problem: The camera's outer cover is dirty for a long time. These are outside the depth of field. The local blur is seen, or there is a spider web on the outer cover of the camera. The infrared light returns at night. White.

Solution: Clean the camera cover regularly as required.