I. Introduction 01. Theoretical Backgrounds 02. Differences of This Study II. Materials and Methods 01. Data Introduction 02. Data Processing 03. Research Design 04. Error Type Classification 05. Methods III. Results and Conclusion 01. PaddleOCR Result 02. EasyOCR Result 03. TrOCR Result 04. 성능 개선(전처리 및 후처리) 05. Discussion and Future Work IV. References 01. References