A local model of eye adaptation for high dynamic range images

• Author(s): Ledda, Patrick ; Santos, Luís Paulo ; Chalmers, Alan
• Date: 2004
• Persistent ID: http://hdl.handle.net/1822/17831
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Human visual system; Eye adaptation; High dynamic range; Tone mapping
• Document Type: Conference Object
• Language: English

Description

In the real world, the human eye is confronted with a wide range of luminances from bright sunshine to low night light. Our eyes cope with this vast range of intensities by adaptation; changing their sensitivity to be responsive at di erent illumination levels. This adaptation is highly localized, allowing us to see both dark and bright regions of a high dynamic range environment. In this paper we present a new model of eye adaptation based on physiological data. The model, which can be easily integrated into existing renderers, can function either as a static local tone mapping operator for single high dynamic range image, or as a temporal adaptation model taking into account time elapsed and intensity of preadaptation for a dynamic sequence. We nally validate our technique with a high dynamic range display and a psychophysical study.