Eye Tracking Calibration via Game Content Integration
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Solution Overview
Problem
Conventional eye tracking calibration methods are visually boring and make users aware that their eyes are being tracked, which is undesirable, especially in gaming environments where a more appealing and stealthy calibration process is needed.
Innovation Solution
The method involves displaying game video content with reference symbols of greater significance during gameplay, capturing eye images when these symbols are displayed, and using the data to calibrate the eye tracking system without the user's awareness, allowing calibration to occur seamlessly during normal game play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional calibration procedure with moving circle is used, then eye tracking calibration accuracy is achieved, but user awareness of eye tracking increases and visual appeal decreases
Solution Approach 1:
The patent merges the calibration process with the actual game video content being displayed. Instead of showing a separate calibration interface with a moving circle, the system uses the game content itself as the calibration stimulus, capturing eye images during normal gameplay when reference symbols appear in the game. This integration makes the calibration process invisible to the user while maintaining accuracy.
Solution Approach 2:
The calibration process occurs continuously during normal gameplay rather than requiring a separate calibration session. The system captures eye images throughout the game whenever reference symbols are displayed, allowing calibration to happen as a continuous background process without interrupting the user's gaming experience or drawing attention to the tracking.
2Measurement precision
If conventional calibration procedure is used, then eye tracking calibration is achieved, but visual appeal and user experience deteriorate
Solution Approach 1:
The calibration interface is merged with the game video content. The system displays game content with embedded reference symbols that serve dual purposes: advancing the game and providing calibration targets. This eliminates the need for a separate, visually boring calibration interface while maintaining calibration accuracy.
Solution Approach 2:
The game content itself serves the calibration function without requiring separate calibration materials. The reference symbols within the game video content automatically provide the necessary fixation points for calibration, allowing the system to calibrate itself during normal operation without user intervention or special calibration procedures.
3Measurement precision
If separate calibration interface is used, then calibration data can be collected, but calibration process time and user disruption increase
Solution Approach 1:
Calibration data collection occurs continuously during gameplay rather than requiring a separate calibration session. The system captures eye images throughout the game whenever reference symbols appear, eliminating the need to pause gameplay for calibration and reducing total calibration time while maintaining data quality.
Solution Approach 2:
The system collects calibration data in advance during normal gameplay before actual eye tracking is needed. By accumulating eye image data throughout the game when reference symbols are displayed, the calibration is completed preliminarily, allowing seamless transition to tracked gameplay without time loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables accurate and unobtrusive eye tracking calibration, enhancing user experience by integrating calibration into the gaming process without the user's knowledge, thus improving the usability and acceptance of eye tracking technology in gaming machines.
Implementation Method 1
an eye tracker assembly 60 including a camera 62 and an infrared illumination device 64
Implementation Method 2
an eye tracker assembly 60 including a camera 62 and an infrared illumination device 64
Data Source
AI summary
A system and method is disclosed for calibrating the location of a player's gaze at a video display of a gaming machine. The system and method includes capturing images of the player's gaze with a camera while displaying a plurality of reference symbols at locations on the display during serial display of game video content. Also, a processor creates control signals that represent the direction of the player's gaze relative to the location of the plurality of symbols on the display of the gaming machine. The processor develops a data set based on the control signals and the locations of the plurality of reference symbols to develop a data set. Further, the system and method includes calibrating the location of the player's gaze using the data set with the location s of the plurality of reference symbols on the display.