What is WDR, 3D DNR, HLC, BLC?
Are your security cameras dark and blurry at night?
We saw part of an image taken by CCTV/IP security cameras extremely dark but another part is very bright so much so that you can't see any detail.How to solve this problem?
How to Fix It If Your Security Camera Picture Is Too Bright?
How to Fix It If Your Security Camera Video Picture Is Too Dark?
Here is how technologies like wide dynamic range (WDR), backlight compensation (BLC), highlight compensation (HLC) come into play in image quality.
What is WDR(Wide Dynamic Range)?
Wide dynamic range (WDR) technology balances the light on an image via image sensors (CCD & COMS) and digital signal processor (DSP). When part of an image is extremely dark but another part is so bright you can’t see any details, that’s dynamic range—the difference in lighting. Cameras with wide dynamic range (WDR) have special software that allows them to balance that lighting for one clear image. This makes them ideal for recording areas like store entrances where the contrast between the sunshine outside and the dim lighting inside can be extremely difficult to record.
What is True WDR?
True WDR – Provides crystal pictures in strongest lighting contrast conditions
How Wide Dynamic Range Works?
Cameras have problems with underexposed and overexposed images because they can only accurately record the middle area of light between very dark and very bright. Cameras with WDR technology have advanced sensors that can produce a wider range of lighting, allowing them to record in a higher light depth.
Along with recording a larger range of lighting more accurately, WDR-enhanced cameras have two other ways of balancing light for better images. Tone mapping lets the camera or software automatically brighten dark areas and darken light areas.
Alternatively, the camera will capture several shots of the scene at different exposure levels. This creates overexposed and underexposed identical images, which the camera will combine. It takes the most balanced parts of both images, creating the recorded image you see. This method requires an extremely fast and light-sensitive sensor, however, and is only available on advanced professional cameras.
What is BLC ( Backlight compensation)?
Backlight compensation (BLC) works by increasing the level of exposure for the entire image via digital signal processors (DSP), which divides an image or scene into different sections and adjust the lighting accordingly.
Simply put, BLC works to brighten the whole scene on a video/image frame instead of balancing lights on overexposed and underexposed areas like WDR does, which in some cases, wash out some already overly-lit areas in an image/video.
How Backlight compensation Works?
BLC – Compensates light to the object in the front for crystal images. BLC technology has been used in CCTV/IP security camera with CCD image sensor to increase exposure for a whole scene, which performs better in a poorly-lit area or monitors areas without enough illumination such as the backyard, alley.
What is HLC (Highlight compensation) ?
Highlight compensation (HLC) is a technology used in CCTV/IP security cameras to deal with image overexposed with lights like headlights or spotlights. Security cameras' image sensors detect strong lights in video and reduce exposure on these spots to enhance the overall quality.
How Highlight compensation Works?
HLC – Avoids the overexposure and blinding of videos day & night.
What is HLS?
HLS – Optimizes the image clarity if the brightness exceeds the threshold
What is 3D DNR (Digital Noise Reduction)?
Removes the image noise for sharp footages in low-light scenarios;3D DNR technology delivers clean and sharp images;
Most wifi security cameras only offer black and white night vision,but some come with colour night vision. This is possible because they have an LED light built in to the camera.Not every security camera that sees colors at night can be called as color night vision security cameras. Soliom s600 smart security cameras remain true full color pictures at ultra clarity even in 0.0005 lux darkness without any ambient lighting, or even 0 lux with the built-in supplement light.