TopTechnical DictionaryWDR – wide dynamic range

WDR – wide dynamic range

WDR (Wide Dynamic Range) - a function providing high quality images in unfavourable lighting conditions.


WDR offers better functionality compared to BLC. WDR uses image exposure analysis. It means that the darker objects in the image are brightened and the objects that are too bright are darkened. The function makes all objects visible, even at large contrast. WDR cameras provide high quality images regardless of the camera being used indoors or outdoors. WDR camera can be used in areas exposed to direct sunlight without affecting the image quality.


Comparison of the quality of images recorded using three different modes: left - without BLC and WDR, centre - with BLC, right - with WDR.


WDR technology also includes a related D-WDR function.


D-WDR (Digital Wide Dynamic Range) – a software-based technique using gamma correction for easy identification of objects in the dark image areas (while maintaining natural shadows and illumination, unlike standard brightness or contrast adjustment).


D-WDR technology is often mistaken for WDR. D-WDR is a less expensive and less effective version of WDR. D-WDR better eliminates problems with unfavourable lighting conditions, however, the digital version does not provide high quality images offered by WDR. The quality of recorded images is adequate.