Contact Lens Tracking Feature for Eye Movement Capture
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current motion capture techniques struggle to accurately animate eye movements, leading to 'dead eyes' in video games and animations, as they require manual animation and are limited to anatomically possible motions, making realistic eye movement difficult to achieve.
Innovation Solution
Incorporating a tracking feature, such as a reflective dot or pattern, into contact lenses to track eye movements during the motion capture process, allowing for the capture of voluntary, involuntary, and automatic eye movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional motion capture markers are used on the face, then body movements can be captured, but eye movements cannot be accurately tracked leading to dead eyes in animation
Solution Approach 1:
The tracking feature is embedded within the contact lens structure itself, nesting the measurement function inside the wearable device. The contact lens contains a tracking feature (reflective dot, fluorescent material, or LED) that is integrated into the lens body, allowing eye movement tracking without external markers on the face.
Solution Approach 2:
The contact lens acts as an intermediary carrier that bridges the gap between the performer's eye and the motion capture system. Instead of placing markers directly on the eye (which would be complex and uncomfortable), the tracking feature within the contact lens mediates the tracking process, being easily detectable by external sensors while remaining comfortable for the performer.
2Reliability
If manual animation is used for eye movements, then anatomical accuracy is maintained, but realism and natural appearance are reduced
Solution Approach 1:
The motion capture system with contact lens tracking provides real-time feedback data about actual eye movements, including voluntary saccades, involuntary drifts, and blinking patterns. This feedback loop allows animators to capture authentic eye behavior and apply it to digital characters, preserving natural movement characteristics that would be difficult to replicate through manual animation alone.
Solution Approach 2:
The system creates a digital copy of actual eye movements by tracking the performer's eye position and movement patterns. This copied motion data can then be applied to animated characters, transferring the natural variability and realism of human eye movements to digital avatars without requiring frame-by-frame manual animation.
3Productivity
If contact lenses with tracking features are used, then eye movement tracking is enabled, but lens comfort and safety must be maintained
Solution Approach 1:
The contact lenses with embedded tracking features can be designed as disposable or short-term wear devices. After a single use or limited wear period, the lenses are discarded, eliminating concerns about long-term comfort and safety. This approach prioritizes capturing authentic eye movements while minimizing potential harm from extended contact lens wear.
Solution Approach 2:
The tracking feature within the contact lens can be designed with adjustable parameters such as reflectivity, fluorescence intensity, or LED brightness to optimize detection while minimizing impact on lens wearability. By adjusting these parameters, the system achieves sufficient tracking accuracy without making the lens overly heavy, bulky, or uncomfortable for the performer.
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
Enables the capture of realistic eye movements, reducing the need for manual animation and enhancing the natural appearance of character animations by providing accurate digital representation of eye movements.
Implementation Method 1
Incorporating a tracking feature, such as a reflective dot or pattern, into contact lenses to track eye movements
Data Source
AI summary
An apparatus for use in motion capture includes a contact lens and a tracking feature incorporated into the contact lens. A method for use in motion capture includes inserting a contact lens having a tracking feature into a performer's eye and tracking movements of the performer's eye using the tracking feature.