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Marius Mutu 495790411f feat(ocr): Add docTR OCR engine with metrics infrastructure

Add docTR as primary OCR engine with 2-tier sequential processing,
OCR metrics tracking, and simplified engine selection.

Features:
- docTR OCR engine with light+medium preprocessing tiers
- doctr_plus mode with early exit optimization (~65% fast path)
- OCR metrics dashboard with per-engine statistics
- User OCR preference persistence
- Parallel worker pool for OCR processing
- Cross-validation for extraction quality

Engine options: tesseract, doctr, doctr_plus (recommended), paddleocr

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

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

2026-01-02 05:37:16 +02:00

4.1 KiB

Raw Blame History

OCR Test Results - docTR+ Engine

Date: 2026-01-02 | Receipts: 26 | Test: Sequential

Summary Comparison

Workers	Avg	Total	Mem Used	Mem Avail
1	6.8s	176s	3.2GB	4.1GB
2	7.2s	187s	3.1GB	4.1GB
3	6.8s	176s	3.9GB	3.3GB

Success Rate: 80.8% (21/26) - same for all configs

Note: For sequential tests, 1 worker ≈ 3 workers speed! Multiple workers only help with parallel requests.

Detailed Results (1 Worker)

#	Receipt	Time	Tier	Result	Notes
01	abonament kineterra	6.8s	T1	✓	97%
02	benzina 14 august	6.0s	T1	✓	83%
03	benzina 27 octombrie	5.9s	T1	✓	83%
04	igiena 11 octombrie	7.7s	T1	✓	97%
05	igiena 14 dec five-holding	11.5s	T1+T2	✗	TOTAL ±1
06	rechizite 12 dec pictus	5.9s	T1	✓	97%
07	benzina 10 mai 2025	5.1s	T1	✓	83%
08	brick consumabil 604 50%	4.8s	T1	✓	97%
09	benzina 13 septembrie	4.9s	T1	✓	83%
10	brick consumabile 604	5.3s	T1	✓	97%
11	benzina 20 dec	5.8s	T1	✓	79%
12	bon fiscal Dedeman	5.7s	T1	✓	90%
13	factura Dedeman	6.8s	T1	✓	97%
14	benzina 13 iulie	5.7s	T1	✓	95%
15	best print stampila	4.5s	T1	✓	94%
16	electrobering telecomanda	4.8s	T1	✓	97%
17	brick igiena 8 oct	11.9s	T1+T2	✗	TOTAL/CUI
18	gama ink refill toner	5.9s	T1	✓	94%
19	kineterra fizioterapie	4.6s	T1	✓	97%
20	brick igiena 1 sept	12.5s	T1+T2	✗	ALL None
21	kineterra abonament	5.6s	T1	✓	97%
22	brick igiena electrice	15.9s	T1+T2	✗	DATE None
23	electrobering igiena	4.4s	T1	✓	97%
24	Lidl papetarie 604	5.8s	T1	✓	87%
25	brick igiena 604	6.8s	T1	✗	DATE ±1
26	unlimited duplicat	4.8s	T1	✓	86%

Time Comparison by Receipt

#	Receipt	1W	2W	3W
01	abonament kineterra	6.8s	6.7s	5.8s
02	benzina 14 august	6.0s	5.5s	5.8s
03	benzina 27 octombrie	5.9s	5.9s	5.7s
04	igiena 11 octombrie	7.7s	8.9s	7.4s
05	igiena 14 dec (FAIL)	11.5s	12.3s	11.9s
06	rechizite pictus	5.9s	5.9s	5.7s
07	benzina 10 mai	5.1s	6.0s	5.8s
08	brick 50%	4.8s	5.9s	5.5s
09	benzina 13 sept	4.9s	5.9s	5.3s
10	brick consumabile	5.3s	5.7s	5.7s
11	benzina 20 dec	5.8s	5.4s	5.8s
12	bon Dedeman	5.7s	5.9s	5.8s
13	factura Dedeman	6.8s	6.9s	6.8s
14	benzina 13 iulie	5.7s	6.1s	5.4s
15	best print	4.5s	5.8s	4.8s
16	electrobering	4.8s	4.2s	4.7s
17	brick 8 oct (FAIL)	11.9s	13.1s	12.0s
18	gama ink	5.9s	5.9s	4.7s
19	kineterra fizioterapie	4.6s	5.9s	4.8s
20	brick 1 sept (FAIL)	12.5s	13.2s	13.1s
21	kineterra abonament	5.6s	4.9s	4.8s
22	brick electrice (FAIL)	15.9s	17.0s	15.5s
23	electrobering igiena	4.4s	5.4s	5.0s
24	Lidl papetarie	5.8s	6.9s	5.8s
25	brick 604 (FAIL)	6.8s	6.5s	6.9s
26	unlimited duplicat	4.8s	5.8s	5.0s
---	---------	----	----	-----
AVG		6.8s	7.2s	6.8s
TOTAL		176s	187s	176s

Tier Analysis

T1 only (early exit): 21 receipts (~5-6s)
T1+T2 (full): 5 receipts (~12-16s)

Failures (5)

Receipt	Issue	Fixable
igiena 14 dec	TOTAL ±1	No
brick 8 oct	TOTAL/CUI	Maybe
brick 1 sept	ALL None	No (bad doc)
brick electrice	DATE None	Maybe
brick 604	DATE ±1	No

Recommendation

OCR_WORKERS=1                    # Best for sequential, saves RAM
OCR_WORKERS=2                    # For parallel requests (production)
OCR_MAX_TASKS_PER_CHILD=0        # No restart

For 8GB RAM: Use 1-2 workers max

4.1 KiB Raw Blame History