Method and apparatus for tracking eye movement
First Claim
1. A method of correcting for movement of a reference object within an image detection field of an eye tracking apparatus said method comprising:
- providing said eye tracking apparatus, said eye tracking apparatus including a first image detector for capturing scene images, a second image detector for capturing eye images including a pupil of said person and a processor for receiving said scene images and said eye images and outputting eye tracking images, each of said eye tracking images including a gaze point corresponding to a line of sight of said person, said first image detector and said second image detector being coupled to a wearable accessory and being fixed relative to one another;
mounting said wearable accessory on said person;
identifying said reference object, said reference object being a marker applied to the skin of said person and being located within said image detection field of said second image detector;
performing a calibration method and generating a calibration mapping, said calibration mapping for mapping pupil location within said image detection field to said scene images;
capturing said scene images and said eye images;
determining a location of said reference object within said image detection field on each of said eye images;
applying said calibration mapping to each of said eye tracking images and adjusting said gaze point on each of said eye tracking images to correct for movement of said reference object within said image detection field;
wherein movement of said reference object within said image detection field corresponds to movement of said wearable accessory relative to said person.
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Accused Products
Abstract
An eye tracking apparatus includes a first image detector for capturing scene images, a second image detector fixed relative to the first image detector for capturing eye images including a pupil of a person and a reference object located within an image detection field, a processor for receiving the scene images and the eye images and outputting eye tracking images, each of the eye tracking images including a gaze point corresponding to a line of sight of the person, the processor for determining a location of the gaze point based on a calibration mapping that maps pupil location within the image detection field to the scene images and a correction mapping that corrects for movement of the reference object within the image detection field of the second image detector. Wherein the first image detector and the second image detector are coupled to a wearable accessory and movement of the reference object within the image detection field corresponds to movement of the wearable accessory relative to the person.
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Citations
8 Claims
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1. A method of correcting for movement of a reference object within an image detection field of an eye tracking apparatus said method comprising:
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providing said eye tracking apparatus, said eye tracking apparatus including a first image detector for capturing scene images, a second image detector for capturing eye images including a pupil of said person and a processor for receiving said scene images and said eye images and outputting eye tracking images, each of said eye tracking images including a gaze point corresponding to a line of sight of said person, said first image detector and said second image detector being coupled to a wearable accessory and being fixed relative to one another; mounting said wearable accessory on said person; identifying said reference object, said reference object being a marker applied to the skin of said person and being located within said image detection field of said second image detector; performing a calibration method and generating a calibration mapping, said calibration mapping for mapping pupil location within said image detection field to said scene images; capturing said scene images and said eye images; determining a location of said reference object within said image detection field on each of said eye images; applying said calibration mapping to each of said eye tracking images and adjusting said gaze point on each of said eye tracking images to correct for movement of said reference object within said image detection field; wherein movement of said reference object within said image detection field corresponds to movement of said wearable accessory relative to said person. - View Dependent Claims (2, 3, 4, 5)
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6. An eye tracking apparatus comprising:
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a first image detector for capturing scene images; a second image detector for capturing eye images including a pupil of a person and a reference object located within an image detection field, said second image detector being fixed relative to said first image detector and said reference object being a marker applied to the skin of said person; a processor for receiving said scene images and said eye images and outputting eye tracking images, each of said eye tracking images including a gaze point corresponding to a line of sight of said person, said processor for determining a location of said gaze point based on a calibration mapping that maps pupil location within said image detection field to said scene images and a correction mapping that corrects for movement of said reference object within said image detection field of said second image detector; wherein said first image detector and said second image detector are coupled to a wearable accessory and movement of said reference object within said image detection field corresponds to movement of said wearable accessory relative to said person. - View Dependent Claims (7, 8)
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Specification