Optical Mark Reader

How Does OMR Work?

1. Scanning – The OMR scanner passes light over the paper to detect darkened areas.

2. Detection – It identifies marks based on how they reflect or absorb light.

3. Processing – The scanner converts the detected marks into digital data.

4. Validation – Software processes the data and records it in a structured format for further analysis.

Uses of OMR

OMR is widely used in various fields, including:
✅ Education – Reading answer sheets in exams like IGCSE, SAT, and national tests.
✅ Surveys & Polls – Collecting responses from large groups efficiently.
✅ Elections & Voting – Counting votes in automated ballot systems.
✅ Attendance & Inventory – Tracking employee attendance or stock records.

Advantages of OMR

✔ High Speed – Processes thousands of sheets per hour.
✔ Accuracy – Reduces human errors in data entry.
✔ Cost-Efficient – Saves time and resources compared to manual checking.
✔ Easy to Use – Requires minimal training to operate.

Disadvantages of OMR

❌ Prone to Errors – Improper or faint markings may not be detected.
❌ Limited to Structured Forms – Cannot read handwriting or open-ended responses.
❌ Special Paper Requirement – Requires pre-printed OMR sheets, increasing cost.