OCR/spec.md at 1f180100409b31c168f1044d06ff07616195a378

egg/OCR

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egg 1f18010040 fix: OCR Track reflow PDF and translation with image text filtering

- Add OCR Track support for reflow PDF generation using raw_ocr_regions.json
- Add OCR Track translation extraction from raw_ocr_regions instead of elements
- Add raw_ocr_translations output format for OCR Track documents
- Add exclusion zone filtering to remove text overlapping with images
- Update API validation to accept both translations and raw_ocr_translations
- Add page_number field to TranslatedItem for proper tracking

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2025-12-12 11:02:35 +08:00

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MODIFIED Requirements

Requirement: Enhanced PDF Export with Layout Preservation

The PDF export SHALL accurately preserve document layout from both OCR and direct extraction tracks with correct coordinate transformation and multi-page support. For Direct Track, a background image rendering approach SHALL be used for visual fidelity.

Scenario: OCR Track reflow PDF uses raw OCR regions

WHEN generating reflow PDF for an OCR Track document
THEN the system SHALL load text content from raw_ocr_regions.json files
AND text blocks SHALL be sorted by Y coordinate for reading order
AND all text content SHALL match the Layout PDF output
AND images and charts SHALL be embedded from element saved_path

Scenario: Direct Track reflow PDF uses structured content

WHEN generating reflow PDF for a Direct Track document
THEN the system SHALL use content.cells for table rendering
AND text elements SHALL use content string directly
AND images and charts SHALL be embedded from element saved_path

Scenario: Reflow PDF content consistency

WHEN comparing Layout PDF and Reflow PDF for the same document
THEN both PDFs SHALL contain the same text content
AND only the presentation format SHALL differ (positioned vs flowing)

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