Visual tests of HDR video

HDR (High Dynamic Range) is a standard format for digital movies that is widely supported by browsers, tvs, and content producers, like Netflix. EasyEyes will use HDR to present stimuli. With a compatible browser and display, HDR offers 10-bit imaging, good timing, and color management (including gamma correction). Click to explore some tests and demos.

PNG Linearity Test

HDR Linearity Test

Timing Test

CSF

DriftingCSF

FlickeringCSF

Spatiotemporal

Each test or demo was produced by computing 16-bit PNG images in JavaScript or MATLAB and then using FFmpeg to convert the PNG images into an HDR movie. The web assembly version of FFmpeg (FFmpeg.wasm) runs in any browser.

Denis Pelli
Professor of Psychology & Neural Science, New York University
denis.pelli AT nyu DOT edu

Rajat Raghuwanshi
Associate Graduate Employee, New York University
rajat.raghuwanshi AT nyu DOT edu

ACKNOWLEDGEMENTS. Thanks to those who gave us expert advice and feedback on implementing HDR video: Minjung Kim at Reality Labs, Rafal Mantiuk at Cambridge University, and Ajit Ninan at Reality Labs.