Abstract
The human visual system constantly adapts to different luminance levels when viewing natural scenes. We present a model of the visual adaptation, which supports displaying the high dynamic range content on the low dynamic range displays. In this solution, an eye tracker captures the location of the observer’s gaze. Temporary adaptation luminance is then determined as the impact of the light area surrounding the gaze point. Finally, the high dynamic range video frame is tone mapped and displayed on the screen in real time. We use a model of local adaptation, which predicts how the adaptation signal is integrated in the retina, including both time-course and spacial extent of the visual adaptation. The applied tone mapping technique uses a global compression curve, the shape of which is adapted to the local luminance value. This approach mimics a natural phenomenon of the visual adaptation occurring in human eyes.
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