Reading Distance Determination via Facial and Tablet Marker Tracking

The patent uses a camera to capture images of markers on the reading tablet and facial markers, creating visual copies of the physical positions. These image copies are then processed through coordinate transformation to calculate reading distance, replacing direct physical measurement tools with optical copying and computational analysis.

The patent replaces traditional mechanical measurement tools with an optical-digital system. Instead of using rulers or physical gauges, the system uses image capture, coordinate identification, and mathematical transformation to determine reading distance, substituting mechanical measurement with computational geometry.

The system automatically captures images, identifies marker positions, performs coordinate transformations, and calculates reading distance without requiring manual intervention. The individual simply needs to hold the tablet and read, while the equipment autonomously completes all measurement and computation steps.

The patent transforms the measurement approach by changing from direct physical measurement to optical coordinate analysis. By capturing images and transforming coordinates between different reference frames (camera frame to tablet frame), the system extracts reading distance information without constraining the natural reading posture.

The system performs image capture, marker identification, coordinate transformation, and reading distance calculation in a continuous automated sequence. The measurement process flows without interruption from the moment the individual reads until the result is displayed, eliminating manual measurement steps and waiting periods.

The system provides immediate feedback by automatically displaying the calculated reading distance to the individual after image processing. This closed-loop feedback allows the individual to understand their measurement result instantly, enabling quick adjustments or re-measurement if needed.