Gaze-Contingent Text Display Reducing Visual Crowding
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Solution Overview
Problem
Current reading technologies are limited by crowding, which restricts the visual span and reading speed, as the brain integrates information from static glimpses separated by saccades, and existing methods to alleviate crowding are ineffective in increasing visual span without creating patterns or reducing attention.
Innovation Solution
A gaze-contingent system that alters visual characteristics of text, such as color and size, based on the observer's gaze location to reduce crowding and increase attention, thereby expanding the visual span and enhancing reading speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If letter spacing is increased to reduce crowding, then visual span is improved, but text area utilization deteriorates
Solution Approach 1:
The patent applies different letter spacing to different regions: letters within the visual span (near fixation) use normal spacing, while letters beyond the visual span use increased spacing. This local differentiation reduces crowding effects at the boundaries of the visual span without unnecessarily reducing text density in the central region where letters are already clearly visible.
2Area of stationary object
If visual characteristics of all letters are altered to reduce crowding, then visual span is improved, but processing complexity increases
Solution Approach 1:
The system alters visual characteristics (color, size, style) only for letters beyond the estimated visual span, while leaving letters within the visual span unchanged. This localized approach reduces crowding effects at the boundaries without unnecessarily complicating the processing of central letters that are already clearly visible.
Solution Approach 2:
Instead of altering all letters uniformly, the system applies visual characteristic changes only to the subset of letters that fall beyond the visual span. This partial action is sufficient to reduce crowding effects without the excessive complexity of processing every letter in the text.
3Productivity
If gaze tracking is implemented to personalize text display, then reading speed is improved, but system complexity increases
Solution Approach 1:
The system uses gaze tracking to obtain feedback about the reader's fixation location, then uses this feedback to dynamically adjust text display parameters (letter spacing, visual characteristics) in real-time. This feedback loop enables personalized text optimization for each reader's visual span without requiring complex manual configuration.
Solution Approach 2:
The system automatically estimates each reader's visual span and configures optimal text display parameters without requiring manual input from the reader. The gaze tracking data is processed autonomously to determine which letters need visual characteristic alterations, enabling the system to serve itself in optimizing the display.
Data Source
AI summary
Methods, systems, and apparatuses, including computer programs encoded on computer readable media, for modifying displayed text in a gaze-contingent way to reduce crowding, thus increasing the observer's visual span, and thus increasing the observer's reading rate. The trick is to introduce only a few differences between characters (not enough to produce a pattern) of text so as to reduce crowding. For example, differences between characters near the left and right extremes of the observer's estimated visual span can be altered to reduce crowding.