Method for operating an eye tracking device and eye tracking device for providing an active illumination control for improved eye tracking robustness
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United States of America Patent
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Nov 22, 2016
Grant Date -
Sep 22, 2016
app pub date -
Dec 9, 2014
filing date -
Dec 9, 2013
priority date (Note) -
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Abstract
The invention relates to an eye tracking device and a method for operating an eye tracking device (30) comprising an imaging device (32), a plurality of light sources (34), a processing unit and a control unit. The imaging device (32) captures a first image (36a) while at least one of the light sources (34) emits light. If at least one first reflection (14; 16; 16a-16f) is detected, a position in the first image (36a) of the at least one first reflection (14; 16; 16a-16f) is determined, the first reflection (14; 16; 16a-16f) is categorized on the basis of the position in the first image (36a) and if the first image (36a) does not fulfill a predefined quality criterion, the plurality of light sources (34) is controlled in dependence of the categorization by changing the light intensity of at least one light source (34).
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