Wide dynamic range

WDR - Dynamic capture

Another, completely different technology used to increase the range is called Dynamic Capture, in which the camera takes several images in a rapid sequence, using a different exposure level for each image. These images are then combined into a composite, with both the brightest and the darkest parts being retained.

Figure 7: Several images are combined to form the final result in dynamic capture.

This image has a much higher bit depth than can be displayed on a computer screen, so tone mapping must be applied here too, as with Dynamic Contrast.

Saving several images in the time normally used for one image requires an extremely fast and sensitive sensor to provide this superior WDR output. This technology is available today in some Axis cameras.

WDR - Forensic Capture