Conventional video and still cameras use fairly simple algorithms to adjust the aperture and exposure time according to scene illumination. Just like the human eye, the camera iris expands and exposure time lengthens when moving from bright to dark conditions.
However, such simple exposure control leads to strong artifacts, such as slow adaptation (to avoid flicker effects) and the blowing out of highlights or loss of shadow detail when a range of illumination levels is present.
Pixel-by-Pixel Autoexposure is based on iridix processing, and unifies the space-variant digital processing of iridix with a modified autoexposure control algorithm.
A camera equipped with this feature adapts almost instantly and naturally to changes in scene conditions, globally or locally, and can manage highlights and shadows continuously and seamlessly. The result is a natural and accurate real-time rendition of the scene.