@InProceedings{BorsatoMori:2018:AsStSt,
author = "Borsato, Frank Helbert and Morimoto, Carlos Hitoshi",
affiliation = "{Universidade Tecnol{\'o}gica Federal do Paran{\'a}} and
{Universidade de S{\~a}o Paulo}",
title = "Asynchronous stroboscopic structured lighting image processing
using low-cost cameras",
booktitle = "Proceedings...",
year = "2018",
editor = "Ross, Arun and Gastal, Eduardo S. L. and Jorge, Joaquim A. and
Queiroz, Ricardo L. de and Minetto, Rodrigo and Sarkar, Sudeep and
Papa, Jo{\~a}o Paulo and Oliveira, Manuel M. and Arbel{\'a}ez,
Pablo and Mery, Domingo and Oliveira, Maria Cristina Ferreira de
and Spina, Thiago Vallin and Mendes, Caroline Mazetto and Costa,
Henrique S{\'e}rgio Gutierrez and Mejail, Marta Estela and Geus,
Klaus de and Scheer, Sergio",
organization = "Conference on Graphics, Patterns and Images, 31. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "stroboscopic structured lighting, rolling shutter, asynchronous
lighting.",
abstract = "Structured lighting (SL) image processing relies on the generation
of known illumination patterns synchronized with the camera frame
rate and is commonly implemented using syncing capable cameras. In
general, such cameras employ global shutters, that exposes the
whole frame at once. However, most modern digital cameras use
rolling shutters, which expose each line at different intervals,
impairing most structured lighting applications. In this paper we
introduce an asynchronous SL technique that can be used by any
rolling shutter digital camera. While the use of stroboscopic
illumination partially solves for the line exposure shift, the
phase difference between the camera and lighting clocks results in
stripe artifacts that move vertically in the video stream. These
stripes are detected and tracked using a Kalman filter. Two
asynchronous stroboscopic SL methods are proposed. The first
method, image differencing, minimizes the stripe artifacts. The
second method, image compositing, completely removes the
artifacts. We demonstrate the use of the asynchronous differential
lighting technique in a pupil detector using a low-cost high-speed
camera with no synchronization means, with the lighting running
independently at a higher, unknown frequency to the application.",
conference-location = "Foz do Igua{\c{c}}u, PR, Brazil",
conference-year = "29 Oct.-1 Nov. 2018",
doi = "10.1109/SIBGRAPI.2018.00048",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2018.00048",
language = "en",
ibi = "8JMKD3MGPAW/3RNU8QS",
url = "http://urlib.net/ibi/8JMKD3MGPAW/3RNU8QS",
targetfile = "sibgrapi2018.pdf",
urlaccessdate = "2024, Apr. 27"
}