High-speed depth from focus on a programmable vision chip using a focus tunable lens

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Authors:
  • Julien N.P. Martel
  • Lorenz K. Muller
  • Stephen J. Carey
  • Piotr Dudek


In this paper, we present a 3D imaging system providing a semi-dense depth map, using a passive, low-power, compact, static, monocular camera. The demonstrated depth estimation system reconstructs 32 depth-levels in real-time at 25FPS drawing less than 1.9W of power. This is achieved by performing computation on an analog focal-plane processor that analyses frames captured through a vibrating liquid focus-tunable lens. The optical system provides shallow depth of focus images and fast sweeps of optical power, while the use of pixel-level processing removes the sensor-processor bandwidth limitations of depth-from-focus systems built using conventional imaging and processor technologies. All-in-focus images are also obtained.

Bibliographical metadata

Original languageEnglish
Title of host publicationProceedings - IEEE International Symposium on Circuits and Systems, ISCAS 2017
ISBN (Print)9781467368520
Publication statusPublished - May 2017

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems