Colored OMR sheets are commonly printed in black along with a complementary color, usually pink. The lighter color is chosen for its contrast with darker shades like black or blue, making it easy for OMR software to selectively ignore it. By removing the lighter color during scanning, only the black response marks remain, ensuring accurate reading of candidates’ answers. This process is known as color dropping.
Color dropping is typically a feature of high-end professional scanners. However, Addmen OMR Sheet Scanner software includes an inbuilt color dropping facility, allowing you to scan colored OMR sheets with precision. The software also provides an easy-to-use interface to adjust the sensitivity of color dropping for optimal results.
If a professional scanner with color dropping capability is available, colored sheets can be scanned directly in black and white. If such a scanner is not available, normal scanners are sufficient for scanning sheets with sizeable black bubbles. Thin marks may require careful scanning, but in most cases, simple image scanners can deliver accurate results when paired with Addmen OMR Sheet Scanner software.
With these guidelines, you can efficiently scan colored OMR sheets using standard or professional scanners while maintaining high accuracy in OMR data processing.
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