Frequently Asked Questions:
What is WDR and DWDR?
WDR stands for Wide Dynamic Range and DWDR stands for Digital Wide Dynamic Range.
- Wide dynamic range (WDR)
Wide dynamic range technology can allow camera capture good effective pictures even under challenging light conditions. The WDR can maintain proper image brightness and exposure, also the contrast and ensures image clarity. Both analogue HD-CVI and IP cameras offer this function. DB is the value to measure the wide dynamic range. A higher WDR range (for example 120DB), represents camera can catch a greater scale of brightness.Typically used where a camera is located inside and is looking at an entrance or door way to out side, hence the high contrast of bright and dark.
Digital wide dynamic range (DWDR)
Digital WDR (D-WDR) is a software-based technique that optimizes image quality by adjusting the gamma (γ) value to enhance dark areas. The DWDR level, which ranges from 1 to 8, should be carefully adjusted according to the lighting conditions in order to minimize possible image deterioration (i.e. the image being washed out). DWDR is not as effective as WDR but comes at a cheaper price.
What is 4K?
4K resloution is essentailly 4 x 1080P.
What is HD-CVI?
HD-CVI stands for High Definition Composite Video Interface.
HD-CVI is a revolutionary Dahua technology that can transmit high definition video quality (1 MegaPixel, 2 Mega Pixel and 4 MegaPixel) over standard RG59 cable or over UTP cabling with Video Baluns. This technology is also Ideal for installations where there is RG59 cable already installed and it makes this type of configurations a breeze lowering the cost of labour and equipment.