Factors Affecting QR Code Scanning
Original article: https://cli.im/article/detail/1987
QR Code Size and Scanning Distance
Determine the printed size of QR codes based on actual scanning distance. Larger QR codes can be scanned from longer distances.
Code Pattern Shape and Size
Code pattern shapes affect scanning accuracy and speed. Clear and regular code patterns significantly improve scanning success rates. CaoLiao offers various code pattern options. We recommend selecting code patterns with clear shapes.
QR Code Colors
QR code colors impact scanning accuracy and speed. Darker QR code colors improve scanning success rates. Light-colored QR codes may become unscannable in low-light environments.
Code Pattern Colors
Code patterns carry encoded information. Avoid using light colors or colors similar to the background. Black or other dark colors are recommended.
Positioning Markers (Eyes)
The three corner positioning markers help devices locate QR codes. Light colors may prevent proper positioning. Set positioning markers to black (scan the sample QR code below to test).
Logo and Text Overlay
CaoLiao supports inserting logos/text within QR codes. Excessive overlays may block code patterns and cause scanning failures. If essential:
- Set error correction level to maximum (30%)
- Conduct pre-printing scanning tests
QR Code Complexity
Longer encoded content creates denser code patterns. Overly complex QR codes may become unscannable. For content-rich applications, use dynamic QR codes instead of static ones. Learn the difference between static and dynamic QR codes.
