Dark flash photography

Dilip Krishnan, Rob Fergus

Research output: Contribution to journalConference article

Abstract

Camera flashes produce intrusive bursts of light that disturb or dazzle. We present a prototype camera and flash that uses infra-red and ultra-violet light mostly outside the visible range to capture pictures in low-light conditions. This "dark" flash is at least two orders of magnitude dimmer than conventional flashes for a comparable exposure. Building on ideas from flash/no-flash photography, we capture a pair of images, one using the dark flash, other using the dim ambient illumination alone. We then exploit the correlations between images recorded at different wavelengths to denoise the ambient image and restore fine details to give a high quality result, even in very weak illumination. The processing techniques can also be used to denoise images captured with conventional cameras.

Original languageEnglish (US)
Article number96
JournalACM Transactions on Graphics
Volume28
Issue number3
DOIs
StatePublished - Jul 27 2009
EventACM SIGGRAPH 2009, SIGGRAPH '09 - New Orleans, LA, United States
Duration: Aug 3 2009Aug 7 2009

Keywords

  • Computational photography
  • Dark flash
  • Multi-spectral imaging
  • Spectral image correlations

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design

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