what is hlc ,blc and wdr CCTV camera!! Difference between hlc and blc!!
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There are many different features that go into security cameras that the average consumer is simply not knowledgeable about. Manufacturers take advantage of this fact and mislabel products they offer, promising features and quality that their cameras can simply not provide. The aim of this article is to educate users about these different features and enable them to make smart, informed purchases when they are looking for security cameras.

Features like Backlight Compensation (BLC), Highlight Compensation (HLC), Wide Dynamic Range (WDR) and others are very important to the quality and clarity of the overall video quality of a camera in different lighting conditions encountered in a single day. These features are very popular and as a result, cheap camera manufacturers will list these features in their specs to help promote and sell their cameras. The problem is, these features are dependent on the sensor and digital signal processor (DSP) that the camera is built with. Without quality components, cheap security cameras are not going to deliver on the manufacturer's promise, leaving many users disappointed in the overall video quality. When used for actual security applications, these features become incredibly important because they enable the viewer to really see the suspect and what is going on in the area of interest. Use this article as a guide to help you determine what features will be best for your use, and what image sensors and DSP chips to look for when you purchase security cameras. Remember, purchasing quality up front will save you from issues down the road with replacing cameras, troubleshooting issues, and time wasted dealing with under performing cameras.

What is Highlight Compensation (HLC) ?

Highlight compensation is a feature that came out of necessity due to overexposure from strong light sources like headlights or spotlights. This feature senses strong sources of light in video and compensates for exposure on these spots to enhance the overall quality. HLC is very helpful in preventing blinding of security cameras at night time from headlights. License plate readability is a feature nearly everyone wants and expects from their security cameras placed in parking lots and entry points. Without HLC this is something that is simply impossible due to the bright, glaring nature of headlights. With the type of HLC provided in most security cameras these days it is possible to reduce the glare in video to an extent and make it possible to see license plates on slow moving front approaching vehicles or stationary vehicles. But if license plate capture is a feature you are in need of for vehicles moving faster than 5mph we advise using actual license plate capture cameras that are specifically designed for this purpose and will perform better because they have other features in addition to HLC that aid in plate capture. One such feature is shutter rate control.


What is Backlight Compensation (BLC) ?

Backlight compensation is a feature that camera companies have been utilizing for some time now. When someone is say sitting in front of a window, or coming in from outside, there is a lot of natural light behind this person. When a camera is aimed in their direction, the camera is picking up all this natural light behind them, therefore the object or person in the foreground becomes very dark, almost silhouette like. Such video is not good for security personnel trying to determine who this person is.

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