Image operation method and system for eye-tracking
AssigneeNational Taiwan University
InventorsShao-Yi Chien, Yu-Sheng Lin, Po-Jung Chiu
Life of this patent
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Abstract
An image operation method and system for obtaining an eye's gazing direction are provided. The method and system employ multiple extraction stages for extracting eye-tracking features. An eye frame is divided into sub-frames, which are then sequentially temporarily stored in a storage unit. Launch features of sub frames are sequentially extracted from the sub frames by a first feature extraction stage, where a data of a former sub-frame is extracted before a data of a latter sub-frame is needed to be stored. Next, the remaining feature extraction stages apply a superposition operation on the launch features to obtain terminal features, which are then computed to obtain an eye's gazing direction.
Claims14
An image operation method for eye-tracking, comprising the steps of:
- capturing an eye frame and dividing the eye-frame into a plurality of sub-frames;
- executing a plurality of feature extraction stages to obtain an eye's gazing direction information, wherein the plurality of feature extraction stages comprises at least a launch feature extraction stage and a terminal feature extraction stage, the launch feature extraction stage extracts launch features from the plurality of the sub-frames, and the terminal feature extraction stage extracts terminal features from the launch features;
- and
- computing the terminal features to obtain the eye's gazing direction information.
An image operation system for eye-tracking, comprising:
- a control unit for providing a control command;
- a processing unit performing a plurality of feature extraction stages on a plurality of sub-frames of an eye frame to obtain an eye's gazing direction information according to the control command, wherein the plurality of feature extraction stages comprises at least a launch feature extraction stage and a terminal feature extraction stage, the launch feature extraction stage extracts launch features from the plurality of the sub-frames, and the terminal feature extraction stage extracts terminal features from the launch features;
- and
- a storage unit for storing the launch features and the terminal features;
- wherein the storage unit comprises a memory module, and the processing unit comprises a single processor or a plurality of stage processing sub-units.
Dependencies are inferred from the claim text.