OMR Checker

The tool analyzes uploaded OMR sheet images to identify bubble positions and determine which options are marked. It localizes the answer grid, applies robust thresholding, and extracts per-question responses. This supports standard MCQ formats across common counts (e.g., 25, 50, 100 questions). The core value is rapid, consistent scoring with auditable per-question results. By separating input data (image + key) from processing logic, it enables reproducible grading across large cohorts. The system can export results as CSV or JSON for record-keeping and integration with student information systems. It also provides a per-question status and a confidence score for each detection, supporting post-processing review and quality assurance. Unique advantages include template-based layout handling for common bubble-sheet designs and automatic alignment correction to mitigate skew or distortion in scanned images. Use cases include classroom exams, standardized assessments, surveys with MCQ sections, and large-scale practice tests. The approach emphasizes accuracy, traceability, and interoperability with reporting workflows. Core features include image pre-processing, grid detection, bubble localization, fill determination, answer-key comparison, and secure export options. This tool is intended for educators, administrators, and testing services seeking to reduce manual grading time while maintaining auditability and scalability.