Dahua’s Starlight technology uses optical, sensor and image processing technologies to provide clear images in dark environments. Dahua cameras with an IR cut filter (ICR) are designed to switch to night mode when the camera senses insufficient light to produce clear color images. When in night mode, the ICR disengages to allow infrared and visible illumination to reach the image sensor. Dahua cameras with Starlight technology can also electronically suppress color information to provide clear monochrome images down to a certain light level. Many cameras include built-in IR illuminators to reduce noise and light an area more.
Many Dahua cameras offer low-light technology using a Sony STARVIS™ CMOS sensor. This back-illuminated pixel technology balances light throughout the scene, resulting in clear images in dark environments. A back-illuminated structure moves the photosensitive surface closer to the light, increasing the amount of light that enters each pixel. It also utilizes Smart Image Signal Processing to convert an image into digital form while enhancing the image or extracting useful information.
Lens aperture controls the amount of light that passes through the lens and into the body of the photosensitive surface of the camera. Dahua cameras with low-light technology feature a maximum aperture of F/2.2 to allow as much light as possible to pass through the lens and hit the sensor. A large aperture along with advanced ISP technology, Dahua’s propriety image processing algorithms, and STARVIS™ imagers allow these cameras to produce identification-level images in near-dark conditions.
Image Signal Processing
Image Signal Processing (ISP) identifies and corrects imperfections caused by the lens, color filter, or sensor. Dahua cameras with STARVIS™ sensors offer two times the definition of Exview HAD CCD sensors and are capable of illuminating dark environments and incorporating near-infrared light for clear recording at night.
Low-light technology provides security even in no-light settings.
About the Technology
Dahua’s Basic Starlight technology is ideal for moderately dark areas. It offers good low-light performance for applications down to 0.008 to 0.009 lux. Basic Starlight offers an affordable price for low-light technology.
Recommended scenarios: Parks, stadiums, and parking lots with some ambient lighting.
Cameras Featuring Basic Starlight
Dahua’s flagship low-light technology—Enhanced Starlight—produces clear images in low-light conditions down to 0.005 to 0.007 lux. Color details are captured longer for enhanced video quality.
Recommended Scenarios: Applications with little to no ambient lighting.
Cameras Featuring Enhanced Starlight
Dahua’s Starlight+ technology provides the best low-light performance, only requiring a minimum illumination of 0.004 lux. Cameras with this technology use a large sensor, smart imaging algorithms and a set of optical features to balance light throughout the scene.
Recommended scenarios: Rural or public areas with little or no ambient lighting.