Problem:
User reported issues with PDF generation:
- Text appears cramped/overlapping
- Incorrect spacing
- Tables in wrong positions
- Images in wrong positions
Solution:
Add comprehensive logging at every stage of PDF generation to help diagnose
coordinate transformation and scaling issues.
Changes:
- backend/app/services/pdf_generator_service.py:
1. draw_text_region():
- Log OCR original coordinates (L, T, R, B)
- Log scaled coordinates after applying scale factors
- Log final PDF position, font size, and bbox dimensions
- Use separate variables for raw vs scaled coords (fix bug)
2. draw_table_region():
- Log table OCR original coordinates
- Log scaled coordinates
- Log final PDF position and table dimensions
- Log row/column count
3. draw_image_region():
- Log image OCR original coordinates
- Log scaled coordinates
- Log final PDF position and image dimensions
- Log success message after drawing
4. generate_layout_pdf():
- Log page processing progress
- Log count of text/table/image elements per page
- Add visual separators for better readability
Log Format:
- [文字] prefix for text regions
- [表格] prefix for tables
- [圖片] prefix for images
- L=Left, T=Top, R=Right, B=Bottom for coordinates
- Clear before/after scaling information
This will help identify:
- Coordinate transformation errors
- Scale factor calculation issues
- Y-axis flip problems
- Element positioning bugs
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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