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Image processing used to harness blinking as a channel of communication and control for physically disabled people
1Rehabilitation Engineering, National Rehabilitation Hospital, Dun Laoghaire, Co, Dublin, Ireland. david.burke@ucd.ie
Medical & Biological Engineering & Computing
|July 24, 2001
Abstract:
Sophisticated mathematical algorithms (such as differencing, thresholding, aggregation and statistical analysis of skin colours) are used to compare successive frames of computer-captured images of the face. From these, changes in state of the eyes are determined and are used to detect blinks. A recognition performance of 83.74 +/- 0.03% is achieved over five subjects with a low rate of false positives 2.71 +/- 0.01%. A logical decision rule identifies purposeful blinks and applies them to control either a custom-designed communication package or an external device.