| Home  | About ScienceAsia  | Publication charge  | Advertise with us  | Subscription for printed version  | Contact us  
Editorial Board
Journal Policy
Instructions for Authors
Online submission
Author Login
Reviewer Login
Volume 50 Number 1
Volume 49 Number 6
Volume 49 Number 5
Volume 49S Number 1
Volume 49 Number 4
Volume 49 Number 3
Earlier issues
Volume  Number 

previous article next article

Research articles

ScienceAsia 40 (2014): 73-83 |doi: 10.2306/scienceasia1513-1874.2014.40.073


A robust optical flow estimation technique using gradient orientations


Pramuk Boonsieng*, Toshiaki Kondo, Waree Kongprawechnon

 
ABSTRACT:     The gradient method is a classical technique for calculating optical flows in image sequences. In spite of its serious limitations, including the extreme sensitivity to changing illuminations, it is still popular and widely used in various image processing and computer vision applications because of its efficiency in computation. We previously proposed an improved version of the gradient method based on gradient orientations instead of intensities. Since gradient orientations are known to be stable to global changes of intensities, the proposed technique can perform optical flow estimation regardless of irregular lighting. We refer to this method the gradient orientation based gradient method (GOGM). This paper is a further study of the GOGM. New simulation and experimental results show that this technique works at a video rate of 16 Hz and outperforms the traditional gradient method where the aperture problem and illumination changes are involved.

Download PDF

25 Downloads 1563 Views


School of Information, Computer and Communication Technology  Sirindhorn International Institute of Technology, Thammasat University

* Corresponding author, E-mail: b.pramuk@gmail.com

Received 7 Dec 2012, Accepted 29 Jul 2013