DNR, DWR, HLC, BLC Digital defogs Camera Meaning
Digital Noise Reduction (DNR)
DNR which stands for Digital Noise Reduction is an image processing technique which aims is to eliminate the visible noise from an image.
This technology is great for when you want to improve image quality when in low light settings and lower bandwidth, saving you storage!
Although you’d want high levels of DNR there are some negative effects when you take these settings to the max. You may find that there is a blur when there is movement in the image, this is similar to the blur that’s created by a slow shutter speed.
Digital Wide Dynamic Range (WDR)
Digital WDR works by using algorithms to digitally enhance dark and bright areas of the image. If the image is overexposed, with far too much light being picked up, DWDR cameras will automatically darken the brighter areas. In the same fashion, if the image is too dark, DWDR technology will add more light to the darker areas.
The DSP chip works to adjust every pixel of the image and calculates the exposure accordingly. Although this sounds highly technical and advanced, it does have a major downside. This intense manipulation of the images’ pixels results in a poorer quality image, with video footage often appearing grainy or low quality,
However, despite this drawback, digital wide dynamic range cameras have no need for the expensive image sensors needed for True WDR cameras, meaning DWDR can be a cheaper option when purchasing a security camera with WDR technology.
Highlight compensation (HLC)
Highlight compensation (HLC), on the other end of the spectrum, is a setting that allows your camera to compensate for brighter parts of your image, maintaining detail in brighter parts of the image that would otherwise be blown out.
Backlight Compensation (BLC)
BLC is known as the Backlight Compensation. It is a setting that helps you to choose which areas the scene should be exposed properly instead of letting the camera choose it automatically. Moreover, cameras can automatically adjust the exposure for a primary scene. But a camera isn’t always right.
With the help of BLC, a camera will be able to over-expose the brighter parts of the image for exposing the darker parts properly. Turning BLC on will be helpful to tell the camera that the darker aspects of an image should be exposed properly.
Digital defogs
Digital defog uses an image processing algorithm to increase image quality when dealing with rain, mist, or foggy conditions. Digital defog is disabled by default.
The digital defog levels in the image panel are applied to all user views and will be seen in recorded video.
