Head-Mounted Eye Tracking Interest Determination
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Solution Overview
Problem
Existing methods for determining a viewer's interest in an object require special apparatuses to measure luminance and illuminance, making it difficult to assess interest in any environment without these devices.
Innovation Solution
An interest determination apparatus that captures images of a target person's eyes, calculates the incident light amount, and compares the reference pupil size to the actual pupil size to determine interest in an object, without the need for special apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If special apparatuses such as luminance meters, eyeball capturing apparatus, face capturing apparatus, visual scene capturing apparatus, and brightness measuring apparatus are used to measure luminance and illuminance, then measurement precision is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent combines multiple functions (eyeball capturing, face capturing, visual scene capturing, and illuminance measurement) into a single integrated apparatus mounted on the viewer's head. This merging eliminates the need for separate special apparatuses while maintaining measurement precision through coordinated operation of multiple sensors and processors.
Solution Approach 2:
The integrated apparatus serves multiple functions simultaneously: capturing eyeball images, capturing face images, capturing visual scene images, measuring illuminance, and processing data to determine pupil diameter. This multi-functionality reduces the number of separate devices needed and simplifies the overall system while improving ease of operation.
2Loss of information
If multiple special apparatuses are mounted on the viewer's head for simultaneous measurement, then measurement completeness is improved, but ease of operation deteriorates
Solution Approach 1:
Multiple measurement functions are merged into a single head-mounted apparatus, ensuring all necessary measurements (eyeball, face, visual scene, illuminance) are taken simultaneously without requiring the user to wear or coordinate multiple separate devices, thereby maintaining measurement completeness while improving ease of operation.
Solution Approach 2:
The apparatus automatically performs all measurements and computations without requiring user intervention or coordination. The system self-manages capturing images from multiple sensors, measuring illuminance, processing data to remove luminance effects, and determining pupil diameter, making the complex measurement process transparent and easy for the user.
3Measurement precision
If luminance measurement is performed to remove luminance effect from pupil diameter, then interest determination accuracy is improved, but device complexity increases
Solution Approach 1:
The patent introduces illuminance measurement as an intermediary parameter to indirectly assess and remove luminance effects on pupil diameter. Instead of directly measuring luminance which would require complex apparatus, the system uses illuminance (measured by a simple illuminance meter) as a mediator to compute and eliminate luminance-induced pupil changes, thereby improving accuracy while avoiding complex luminance measurement equipment.
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 determination of a target person's interest in an object under any environment, accurately assessing interest without the requirement for special measurement tools like luminance meters or brightness measuring apparatuses.
Implementation Method 1
image acquisition means for acquiring an image obtained by capturing at least eyes of a target person
Implementation Method 2
pupil size calculation means for calculating a pupil size of the target person using the image
Data Source
AI summary
An image acquisition unit (2) acquires an image obtained by capturing at least eyes of a target person. An object specifying unit (4) specifies an object in a line-of-sight direction of the target person using the acquired image. An incident light amount calculation unit (6) calculates an incident light amount representing an amount of light incident on the eyes of the target person using the acquired image. A reference pupil size determination unit (8) determines a reference pupil size based on the calculated incident light amount. A pupil size calculation unit (10) calculates a pupil size of the target person using the acquired image. An interest determination unit (12) determines an interest of the target person in the object by comparing the determined reference pupil size with the calculated pupil size.