The PDF Predicament
A government agency publishes a 200-page PDF report that is essential for public access. The PDF is a scanned image with no text layer, making it inaccessible to screen readers. The agency has received complaints from blind users who cannot access the content. The agency's IT team suggests using OCR to add a text layer and then running an automated accessibility checker to fix any issues. They plan to complete the remediation in two weeks. However, the report contains complex tables, charts, and footnotes. The agency has a limited budget and no in-house accessibility experts. They ask you to advise on the best approach to make the PDF accessible while meeting the deadline and budget constraints.
1. What are the risks of relying solely on OCR and automated checkers for PDF remediation? How might these tools fall short for this document?
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OCR may introduce errors in text recognition, especially with complex layouts, tables, and footnotes. Automated checkers can detect some issues (e.g., missing alt text) but cannot ensure logical reading order, proper table headers, or meaningful alt text for charts. They also cannot verify the quality of OCR output. Relying solely on these tools risks producing a PDF that passes automated checks but remains inaccessible or confusing for screen reader users. Manual review and remediation are necessary for complex documents.
2. Propose a remediation plan that balances accessibility, time, and budget. Include alternatives if full remediation is not feasible within two weeks.
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- Prioritize: Identify critical content (e.g., main report text, key tables) and remediate those first. 2. Use OCR with manual correction for text. 3. For complex tables, consider converting to accessible HTML or providing a supplementary accessible version. 4. For charts, provide long descriptions in text. 5. If full remediation is not possible, publish an accessible HTML summary alongside the PDF and clearly state the PDF's limitations. 6. Engage a contractor for expert remediation if budget allows. 7. Communicate progress and provide a contact for accommodation requests.