Blurry images are a common complaint among many security camera users. Here are some reasons why security cameras may produce blurry images at night and how to address them:
1. Dust, water, and insects
Dust, water vapour, and small insects are among the most common culprits. Poorly sealed camera seams can allow dust and water vapour to accumulate on the lens or sensor, causing the video to appear fuzzy. Low-light conditions can also cause the camera lens to blur the image. Small insects can interfere with the camera’s ability to produce clear images.
2. Reflective Objects and Light Sources
Bright and reflective objects near the camera, such as walls or strong light sources, can reflect too much light onto the lens. This creates a large white area in the security camera footage while leaving the surroundings in low light, causing these areas to appear black and blurry. Ensure the camera is positioned away from these reflective objects to reduce these effects.
3. Lack of Infrared or White LED Fill Light
A camera lacking infrared or white LED fill light can produce blurry images at night. Images might turn out too dark to see clearly, and the camera’s night vision is poor, leading to blurred footage. Invest in a security camera with infrared or white LED fill light to get clear nighttime footage.
4. Camera Algorithm
The camera algorithm is designed to capture images in low light conditions by increasing the gain of the image sensor, which can increase noise levels and produce a blurry image. Adjusting the camera aperture, exposure time, or image sensor sensitivity should help reduce noise while capturing more light. These adjustments require a delicate balance.
Zosi’s algorithm has been updated for years, and the quality of nighttime footage is guaranteed.
5. Lens Flare and Ghosting
Lens flare occurs when bright light reflects onto the surface of the lens and enters the camera sensor. It can create washed-out or blurred images, and dome security cameras are particularly susceptible to this because of their transparent shield. Avoid mounting cameras in bright places to reduce lens flare, or choose a camera with a coating that reduces flare significantly.
Ghosting is another common problem that causes double images because the camera captures light reflected from nearby surfaces. It can make images appear blurred and hard to interpret. Position your camera away from bright surfaces to reduce ghosting, improving image clarity and sharpness.
6. Scratched Lens or Cover
A scratched lens or cover can also produce poor video quality, particularly at night. Choosing a scratch-resistant material for your camera will help you avoid this problem. Check the camera’s lens for scratches during the delivery and installation process, and choose a manufacturer known for using high-quality lens materials.
7. Camera Positioned Towards a Glass Window
Positioning a camera with night vision behind a glass window will result in poor image quality due to glare and lighting conditions inside and outside the house. Avoid installing cameras behind glass windows to ensure clear and reliable security footage.
Read also: Night Vision Security Cameras: Seeing in the Dark Made Easy