Share Email Print

Proceedings Paper

Real time algorithm invariant to natural lighting with LBP techniques through an adaptive thresholding implemented in GPU processors
Author(s): S. A. Orjuela-Vargas; J. Triana-Martinez; J. P. Yañez; W. Philips
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Video analysis in real time requires fast and efficient algorithms to extract relevant information from a considerable number, commonly 25, of frames per second. Furthermore, robust algorithms for outdoor visual scenes may retrieve correspondent features along the day where a challenge is to deal with lighting changes. Currently, Local Binary Pattern (LBP) techniques are widely used for extracting features due to their robustness to illumination changes and the low requirements for implementation. We propose to compute an automatic threshold based on the distribution of the intensity residuals resulting from the pairwise comparisons when using LBP techniques. The intensity residuals distribution can be modelled by a Generalized Gaussian Distribution (GGD). In this paper we compute the adaptive threshold using the parameters of the GGD. We present a CUDA implementation of our proposed algorithm. We use the LBPSYM technique. Our approach is tested on videos of four different urban scenes with mobilities captured during day and night. The extracted features can be used in a further step to determine patterns, identify objects or detect background. However, further research must be conducted for blurring correction since the scenes at night are commonly blurred due to artificial lighting.

Paper Details

Date Published: 7 March 2014
PDF: 11 pages
Proc. SPIE 9023, Digital Photography X, 902304 (7 March 2014); doi: 10.1117/12.2042619
Show Author Affiliations
S. A. Orjuela-Vargas, Univ. Antonio Nariño (Colombia)
J. Triana-Martinez, Univ. Antonio Nariño (Colombia)
J. P. Yañez, Univ. Antonio Nariño (Colombia)
W. Philips, Univ. Gent (Belgium)

Published in SPIE Proceedings Vol. 9023:
Digital Photography X
Nitin Sampat; Radka Tezaur; Sebastiano Battiato; Boyd A. Fowler, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?