Automated Visual Accessibility Testing for Digital Content
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Solution Overview
Problem
Evaluating the visual accessibility of digital content, such as web pages, on various devices is tedious and difficult due to the varying types of content and display devices, necessitating an automated mechanism for efficient processing and evaluation.
Innovation Solution
Implementing an automated process in electronic devices to render digital content, identify test regions, apply test criteria, and generate visual test results, using edge detectors, characterizers, and testers to assess characteristics like contrast ratios and color schemes, aligned with guidelines like WCAG 2.0, and presenting results with visual indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated testing mechanism is implemented, then productivity is improved, but device complexity increases
Solution Approach 1:
The automated testing system is designed to evaluate multiple types of digital content (web pages, images, videos) across various display devices using a single unified platform. The system performs diverse accessibility assessments including contrast ratios, color schemes, font sizes, and text alternatives, consolidating multiple testing functions into one multi-functional apparatus that improves productivity without proportionally increasing complexity
Solution Approach 2:
The system introduces an intermediary automated testing apparatus that mediates between the digital content creators and the accessibility evaluation process. This intermediary automatically renders content, identifies test regions, applies test criteria, and generates results, eliminating the need for manual testing while managing system complexity through modular architecture
2Measurement precision
If comprehensive test criteria are applied, then measurement precision is improved, but processing time increases
Solution Approach 1:
The system performs preliminary actions by pre-defining test criteria based on established accessibility guidelines (WCAG 2.0, Section 508) and pre-processing digital content to identify relevant test regions before actual evaluation. Test regions such as text areas, images, and graphical elements are pre-identified and categorized, so that when comprehensive testing is applied, the system can quickly retrieve and apply appropriate criteria without reprocessing the entire content, thus maintaining measurement precision while reducing processing time
Solution Approach 2:
The testing process is segmented into distinct phases: content rendering, test region identification, criterion application, and result generation. Each phase handles specific aspects of accessibility evaluation independently. This segmentation allows the system to apply comprehensive test criteria systematically to different content elements (text, images, videos) separately, improving measurement precision through thorough evaluation while reducing overall processing time through parallel processing of segmented tasks
Data Source
AI summary
Methods and apparatuses are provided which may be implemented to in various electronic devices to evaluate displayable digital images based on certain test criterion. The displayable images may represent web content and/or the like, and the test criterion may include or relate to desired user experience and/or other like content accessibility measures.