Factors Affecting QR Code Scanning

Original: https://cli.im/article/detail/1987

QR Code Size and Scanning Distance

Determine the printed size of the QR code based on the actual scanning distance. The larger the QR code, the farther the scanning distance.

Shape and Size of QR Code Dots

The shape of the QR code dots affects the scanning accuracy and speed. Clear and well-defined dots can effectively improve the scanning success rate. CaoLiao offers a variety of QR code dot styles to choose from. It is recommended to select dots with clear shapes.

QR Code Color

The color of the QR code affects the scanning accuracy and speed. Darker QR code colors can improve the scanning success rate. Light-colored QR codes may fail to scan in low-light environments.

Dot Color

The dots carry the encoded information of the QR code. The color should not be too light, and it is not recommended to use colors similar to the background. It is recommended to use black or other dark colors.

Finder Pattern Color

The finder patterns are the positioning points of the QR code, located at the three corners of the QR code pattern. Colors that are too light may cause mobile phones or scanners to fail to locate the QR code, resulting in scanning issues. It is recommended to set the finder pattern color to black. You can try scanning the QR code below to test.

Logo and Text Overlay

CaoLiao supports inserting logos and text within the QR code. Overly large logos and text can block a significant number of dots, leading to missing QR code content and scanning failures. If your business requires text in the center of the QR code or a large logo, it is recommended to set the QR code error correction level to the highest (30%) and test whether the QR code can be scanned before printing.

QR Code Complexity

The longer the content encoded in the QR code, the more complex the QR code pattern becomes, and the more dots it contains. Excessively complex QR codes may result in overly dense dots that are difficult to recognize. If you have a large amount of content to encode, it is recommended to use a dynamic QR code. Learn the difference between static and dynamic QR codes