Acta Metrologica Sinica  2022, Vol. 43 Issue (3): 331-337    DOI: 10.3969/j.issn.1000-1158.2022.03.06
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Research on Correction of Fixation Point of Corneal-reflection-based Eye Tracking System
HU Kai,MU Ping-an,HUANG Shi-long
School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology, Shanghai 200093,China
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Abstract  In order to improve the accuracy of the system. The screen is divided into 6 rows and 8 columns, a total of 48 areas. Calibration points are set in the center of each area, and the tester looks at each calibration point in turn to calculate the 48 errors. The errors are decomposed into X-axis and Y-axis errors, and then the X-axis and Y-axis errors are used as calibration values and are interpolated to obtain the X-axis and Y-axis calibration values for any position within the entire screen. At last, X-axis and Y-axis calibration values are used to correct the X-axis and Y-axis coordinates of fixation point. Compared with the current better calibration method, the X-axis error is reduced by 35.8%, and the Y-axis error is reduced by 53.3%. The correction effect of this correction method is significantly improved, which can effectively improve the accuracy of eye tracking.
Key wordsmetrology      eye tracking      cross ratio invariance      pupil center detection      radial basis function     
Received: 21 December 2020      Published: 23 March 2022
PACS:  TB96  
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HU Kai
MU Ping-an
HUANG Shi-long
Cite this article:   
HU Kai,MU Ping-an,HUANG Shi-long. Research on Correction of Fixation Point of Corneal-reflection-based Eye Tracking System[J]. Acta Metrologica Sinica, 2022, 43(3): 331-337.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.03.06     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I3/331
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