Eye tracking apparatus and method thereof
AssigneeIndustrial Technology Research Institute
InventorsHsiao-Wei Liu, Yu-Ying Lan, Hsin-Cheng Lin, Chung-Lun Kuo, Chia-Liang Yeh
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Abstract
An eye tracking apparatus and an eye tracking method for the eye tracking apparatus are provided. The eye tracking apparatus includes an image capture device and a computing device. The image capture device is adapted to capture at least one face image. The computing device is coupled to the image capture device. The computing device receives the face image to obtain an eye image and identifies at least one iris region of the eye image. The computing device chooses the largest iris region from the iris regions to obtain a fitting pattern of the largest iris region and obtains a gaze point of the eye image based on the fitting pattern.
Claims22
An eye tracking apparatus, comprising:
- an image capture device, configured to capture at least one face image;
- and
- a computing device, coupled to the image capture device, receiving the face image to obtain an eye image, performing an image enhancing operation to enhance the eye image and thereby generate an enhanced eye image, and defines the at least one iris region in the enhanced eye image, identifying at least one iris region in the eye image, and choosing a largest iris region from a plurality of fitting patterns based on calculated radii of the plurality of fitting patterns;
- wherein a gaze point of the eye is a center of the fitting patterns,
- a training device, coupled to the computing device and configured to perform a training operation on an eye image sample to generate a classification parameter;
- and
- a storage device, coupled to the training device and the computing device, and configured to store the classification parameter, such that the computing device identifies the at least one iris region in the eye image based on the classification parameter.
An eye tracking method, comprising:
- capturing at least one face image;
- obtaining an eye image of the face image;
- performing a training operation on an eye image sample to obtain a classification parameter;
- storing the classification parameter;
- identifying the at least one iris region in the eye image based on the classification parameter;
- performing an image enhancing operation to enhance the eye image and thereby generate an enhanced eye image, and defines the at least one iris region in the enhanced eye image;
- identifying at least one iris region with irregular shapes in the eye image;
- choosing a largest iris region from the at least one iris region and obtaining a plurality of fitting patterns of the largest iris region with the largest calculated radii from a plurality of fitting patterns;
- and
- obtaining a gaze point of the eye image based on a center of the fitting patterns.
Dependencies are inferred from the claim text.