Table 3.

Quantitative evaluation of OCR performance improvements across progressive preprocessing stages.

Test ID	TORNet	TFAF	OCR API	CAR (%)	FMAR (%)
1	×	×	Paddle OCR	69	59
2	×	×	Tencent OCR	68	60
3	×	×	Youdao OCR	67	58
4	✓	×	Paddle OCR	81	74
5	✓	×	Tencent OCR	81	73
6	✓	×	Youdao OCR	83	74
7	✓	✓	Paddle OCR	93	94
8	✓	✓	Tencent OCR	93	92
9	✓	✓	Youdao OCR	92	91