Staggered Eyeball Image Capture for Faster Gaze Detection
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Solution Overview
Problem
Existing MR technologies face challenges in improving the cycle of reading out line-of-sight direction detection results while maintaining accuracy and reducing costs associated with high frame rate image capturing elements and increased communication bus width.
Innovation Solution
The image capturing apparatus employs two line-of-sight detectors, one for each eye, with staggered capture and detection cycles synchronized to display vertical synchronization signals, allowing for efficient line-of-sight detection without requiring high frame rate elements or increased bus width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high frame rate image capturing element is implemented to improve the cycle of reading out line-of-sight detection results, then the productivity is improved, but the cost increases
Solution Approach 1:
The patent divides the line-of-sight detection into separate processing paths for left and right eyes. Each eye's eyeball image is captured and processed independently through dedicated line-of-sight detecting units, allowing parallel processing that improves the cycle of reading out detection results without requiring a single high-frame-rate capturing element
Solution Approach 2:
The patent implements periodic capture and detection cycles for each eye separately, synchronized with display vertical synchronization signals. This periodic action allows the system to maintain improved detection cycles while using standard frame rate capturing elements, avoiding the need for expensive high frame rate components
2Productivity
If communication bus width is increased to improve data transfer bandwidth between devices, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The patent segments the data processing into separate detection units for each eye, with each unit processing one eye's data independently. This segmentation allows data to be processed in parallel without requiring increased communication bus width, as each detecting unit operates autonomously
Solution Approach 2:
The patent introduces a control unit that acts as an intermediary to coordinate the periodic capture and detection cycles between the left and right eye detectors. This intermediary manages the synchronization and data flow efficiently without requiring increased bus width
Data Source
AI summary
An image capturing apparatus includes a first line-of-sight detector configured to capture a first eyeball image as a left eyeball image and detect a first line of sight based on the first eyeball image at a first cycle, and a second line-of-sight detector configured to capture a second eyeball image as a right eyeball image and detect a second line of sight based on the second eyeball image at the first cycle. A timing of starting to capture the first eyeball image and a timing of starting to capture the second eyeball image are different from each other.