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    WDR


    For enhanced image accuracy

    Technologies for video surveillance cameras to provide the best image quality under various circumstances have been actively pursued in recent times. Among such developments, the most important is Wide Dynamic Range (WDR, backlight correction technology), which reacts to the change of light.

    WDR is a technology for improving the accuracy of an image by resolving the difference in brightness in video when the background is brighter than the main object or thick shade is generated by strong light.

    Generally, WDR becomes the most essential in the following situations:
    • During daytime, when inside of the building is darker than outside.
    • A car is approaching the camera with its headlights turned on.

    Currently, Variable Exposure Control method is commonly used. Using this method, an image is generated by using the information from multiple images taken with both short and long exposure. This, however, has some side effects. Most notable example is the artifacts that occur when monitoring moving objects. If the object is moving too fast and the exposure time is too long, the image will be contaminated with artifacts.

    The superb performance of Hanwha Techwin's WDR is made possible due to its Wisenet 5 chipset, the latest SoC (System on Chip) developed from years of experience in semiconductor manufacturing. It can generate natural images without any loss of information even in the worst environments, such as, when the background is brighter than the main object, when thick shade is generated due to strong light, or when there is a large gap in screen brightness. In addition, it can significantly reduce the effect of motion artifact, a critical weakness of conventional WDR.

    Demo Video

    White Paper

    WDR : Wide Dynamic Range

    Download White Paper

    Wisenet 5's WDR - World Best 150dB

    Wisenet 5 chipset-embedded models (Wisenet X series) use WDR technology, which adopted the Variable Exposure WDR; it obtains four images with different exposures to generate one WDR image. These four images are required to obtain an ultra wide dynamic range image.

    Comparison of the existing 2 fps WDR and 4 fps WDR applied to X series

    Motion Artifact Removal

    WDR of Hanwha Techwin's X series developed and applied motion artifact removal technology to overcome a critical weakness of variable exposure WDR. This is a technology for correctly detecting and analyzing movement in an image and making necessary adjustments to generate the most natural image of the detected area.

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