Detection of fixations and smooth pursuit movements in high-speed eye-tracking data. (April 2015)

• Record Type: Journal Article
• Authors: Larsson, Linnéa; Nyström, Marcus; Andersson, Richard; Stridh, Martin
• Is Part Of: Biomedical signal processing and control. Volume 18(2015)
• Page Start: 145
• Page End: 152
• Publication Date: 2015-04
• Subjects: Signal processing -- Eye-tracking -- Smooth pursuit; Signal processing -- Periodicals; Biomedical engineering -- Periodicals; Signal Processing, Computer-Assisted -- Periodicals; Image Processing, Computer-Assisted -- Periodicals; Biomedical Engineering -- Periodicals; 610.28
• DOI: 10.1016/j.bspc.2014.12.008
• Languages: English
• ISSNs: 1746-8094

Abstract

Abstract : Highlights: This paper presents an algorithm for detection of fixations and smooth pursuit movements. A comprehensive framework for performance evaluation was proposed. The proposed algorithm outperforms current state of the art algorithms. Abstract: A novel algorithm for the detection of fixations and smooth pursuit movements in high-speed eye-tracking data is proposed, which uses a three-stage procedure to divide the intersaccadic intervals into a sequence of fixation and smooth pursuit events. The first stage performs a preliminary segmentation while the latter two stages evaluate the characteristics of each such segment and reorganize the preliminary segments into fixations and smooth pursuit events. Five different performance measures are calculated to investigate different aspects of the algorithm's behavior. The algorithm is compared to the current state-of-the-art (I-VDT and the algorithm in[11] ), as well as to annotations by two experts. The proposed algorithm performs considerably better (average Cohen's kappa 0.42) than the I-VDT algorithm (average Cohen's kappa 0.20) and the algorithm in[11] (average Cohen's kappa 0.16), when compared to the experts' annotations.