The Electronic Grading System is a system that utilizes electronic devices and software for the marking and scoring of exams. It enhances grading efficiency, reduces human errors, and provides more accurate and reliable scoring results. The following are the typical features and performance requirements of an Electronic Grading System:

Image Scanning and Recognition: The electronic grading system should possess high-quality image scanning capabilities, converting paper-based exam papers into digital format. Additionally, the system should feature robust image recognition algorithms that can automatically identify and extract text, charts, and other content from the exam papers.

2. Test Layout and Question Recognition: The system should be capable of automatically recognizing test layouts and questions, identifying the positions of questions, options, and answers on the test, ensuring accurate grading.

3. Answer Recognition and Scoring: The system should have an efficient and accurate answer recognition feature, capable of automatically identifying students' answers and scoring them according to pre-set scoring criteria. For objective questions, the system can directly determine whether the answer is correct or incorrect based on the options. For subjective questions, the scoring is done according to pre-set scoring rules.

4. Mixed scoring of objective and subjective questions: The electronic grading system should be capable of mixed scoring, handling both objective and subjective questions simultaneously. For objective questions, the system can automatically score them, while for subjective questions, it can provide scoring references and support teachers' manual grading.

5. Exception Handling: The system should be capable of automatically handling exceptions such as incorrect filling or duplicate filling. It should be able to identify these exceptions and take appropriate actions, such as issuing warnings or instructions for retesting or manual review.

6. Data Management and Reporting Generation: The system should offer data management features capable of storing and managing grading data, as well as generating relevant reports such as grade transcripts and scoring statistics. This aids schools or institutions in data analysis and exam assessment.

7. Security and Confidentiality: The electronic grading system should incorporate security and confidentiality measures to ensure the secrecy of the grading process and the safety of data. This includes features such as access control, data encryption, and anti-tampering.

8. System Stability and Performance: The electronic grading system should have stable operation and excellent performance, capable of handling a large volume of exam papers and scoring data. The system's response speed should be fast, and it should maintain normal operation even with multiple users accessing simultaneously.

9. Compatibility and Flexibility: The system should have excellent compatibility, enabling integration with existing administrative systems or management systems of other schools or institutions. Additionally, the system should offer a degree of flexibility, allowing for customization and expansion based on user requirements.