Perceptually-Guided Foveation for Light Field Displays

Title: Perceptually-Guided Foveation for Light Field Displays

Teams: Nvidia；Stony Brook University；University of Hong Kong

Writers: Qi Sun (Stony Brook University & NVIDIA)；Fu-Chung Huang (NVIDIA)；Joohwan Kim；Li-Yi Wei (University of Hong Kong)；David Luebke；Arie Kaufman (Stony Brook University)

Publication date: November 27, 2017

Abstract

A variety of applications such as virtual reality and immersive cinema require high image quality, low rendering latency, and consistent depth cues. 4D light field displays support focus accommodation, but are more costly to render than 2D images, resulting in higher latency. The human visual system can resolve higher spatial frequencies in the fovea than in the periphery. This property has been harnessed by recent 2D foveated rendering methods to reduce computation cost while maintaining perceptual quality. Inspired by this, we present foveated 4D light fields by investigating their effects on 3D depth perception. Based on our psychophysical experiments and theoretical analysis on visual and display bandwidths, we formulate a content-adaptive importance model in the 4D ray space. We verify our method by building a prototype light field display that can render only 16%-30% rays without compromising perceptual quality.