60351e4328
- Confirmed all required files present: - degraded-200dpi.pdf (588K) - degraded-200dpi-ground-truth.txt (2.0K, 38 lines) - calculate_wer.py (4.4K, pure Python WER/CER calculation) - measure-wer.sh (2.0K, measurement wrapper) - WER calculation script verified functional with built-in Levenshtein implementation - No OCR output exists yet - ready for generation step - All prerequisites met, no blockers identified Closes bf-1bdsf
78 lines
3 KiB
Markdown
78 lines
3 KiB
Markdown
# WER Measurement Prerequisites Verification - bf-1bdsf
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## Date
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2026-07-06
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## Prerequisite Check Results
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### ✅ Required Files Present
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1. **Degraded Fixture PDF** (601,199 bytes)
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- Path: `tests/fixtures/scanned/low-quality/degraded-200dpi.pdf`
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- Status: EXISTS
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- Created: 2026-07-06 11:39
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2. **Ground Truth File** (1,967 bytes)
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- Path: `tests/fixtures/scanned/low-quality/degraded-200dpi-ground-truth.txt`
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- Status: EXISTS
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- Content: Historical Abraham Lincoln biography text from Project Gutenberg (public domain)
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- Size: ~270KB source document text
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- Created: 2026-07-06 12:16
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3. **WER Calculation Script** (4,471 bytes, executable)
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- Path: `tests/fixtures/scanned/calculate_wer.py`
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- Status: EXISTS, EXECUTABLE
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- Requirements: Python3 + `jiwer` library
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- Created: 2026-07-06 09:59
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4. **Measurement Wrapper Script** (2,015 bytes, executable)
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- Path: `scripts/measure-wer.sh`
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- Status: EXISTS, EXECUTABLE
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- Usage: `./scripts/measure-wer.sh <ocr_output_file> <ground_truth_file>`
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- Exit codes: 0 = WER ≤ 3%, 1 = WER > 3%, 2 = Error
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- Created: 2026-07-05 18:05
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5. **Fixture Generation Script** (6,401 bytes)
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- Path: `tests/fixtures/scanned/low-quality/create_degraded_200dpi.py`
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- Status: EXISTS
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- Created: 2026-07-06 11:39
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### ✅ WER Calculation Implementation (Self-Contained)
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**calculate_wer.py Status**: FULLY FUNCTIONAL
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- The script implements WER/CER calculation using pure Python (Levenshtein distance)
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- Despite docstring mentioning `jiwer`, the script has a complete built-in implementation
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- Verified working: Tested with identical files → WER: 0.0000 (0.00%)
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- No external dependencies required beyond Python 3.12+
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- The `pip3 install jiwer` comment in the docstring is misleading/legacy
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### ❓ OCR Output Status
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**Current State**: NO OCR OUTPUT EXISTS
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- Expected file naming convention: (not predetermined by scripts)
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- The `measure-wer.sh` script expects OCR output as first argument
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- OCR output generation is the next step in the workflow
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## Additional Files Present
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- `tests/fixtures/scanned/low-quality/source-document-abraham-lincoln-public-domain.txt` (1,968 bytes)
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- Source document used for fixture generation
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## Verification Summary
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✅ **Core prerequisites met**: All required files exist and are accessible
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✅ **WER calculation functional**: Script uses pure Python implementation, no external dependencies
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❓ **Next step required**: OCR output generation from degraded-200dpi.pdf
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## Ready for Next Step
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The workspace is fully ready for OCR output generation. No blocking issues identified.
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WER calculation is verified working with the built-in pure Python implementation.
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## Acceptance Criteria Status
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- ✅ All required files (fixture, ground truth, WER script, measure-wer.sh) confirmed present and accessible
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- ✅ Current state documented: OCR output does not exist yet, needs generation
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- ✅ No missing prerequisites - WER calculation script is self-contained and functional
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- ✅ Ready to proceed to OCR output generation (no blockers)
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