4 QR Code Scanning Problems and How to Fix Them
Are you feeling frustrated because your QR code is not working?
A QR code is a two-dimensional barcode that can store large amounts of information. The code consists of black squares arranged in a square grid on a white background and can be scanned or read by a barcode reader.
The code contains text, URLs, contact information, and more. When a QR code is scanned, the QR code scanner interprets the information in the code and then takes appropriate action.
For example, if a QR code contains a URL, the QR code scanner uses the URL to open a webpage.
Top QR Code Scanning Problems & Solutions
Do you know that QR codes can also fail? The QR code scanning problems arise despite their high levels of error tolerance. Let us examine the specifics with some examples.
Quality Issues
If the QR code is printed or displayed with low quality, it can become difficult to scan. Poor contrast or smudging on the code can cause problems with scanning. In addition, if the QR code is not of sufficient resolution or is printed on a material that does not provide sufficient contrast, it may be difficult to scan.
Solution
To resolve QR code scanning problems related to quality, here are some tips:
- Ensure the QR code has enough contrast against its background so the scanning device can easily read it.
- Check if the QR code is damaged, such as scratches or smudges. If so, reprint the QR code.
- Try creating your own barcode scanning solution using a robust barcode scanner SDK. You can build a solution that is better at scanning low-quality QR codes.
- If you’re creating the QR code yourself, use a high-quality image or vector graphic to create it.
- It’s best to use a professional-grade printer when printing QR codes.
Size Constraints
The QR code size should be sufficient to hold all the data it needs to represent. If the size is too small, the QR code may not be able to store all the information properly, or the scanning app may not be able to read the code.
For instance, one constraint with QR codes used for payments is that they must be a certain size to be scannable at the point of sale (POS) terminal. If the QR code is too small or the resolution is low, the scanner may not recognize it, leading to payment errors or delays.
Solution
- Make sure that the QR code is printed at the recommended size.
- Ensure that the QR code is placed in an easily accessible location so users can easily reach it.
- Try increasing the QR code size if it’s too small to be scanned accurately. A larger QR code will have more modules, making it easier for cameras to detect and read.
- If the QR code is displayed on a screen, ensure its resolution is set to an appropriate level to be clearly seen.
- Try using a robust QR code scanning solution that offers quick and accurate scanning regardless of the QR code size.
Encoding Errors
QR codes can contain various data types, including alphanumeric characters, symbols, and binary data. Encoding errors can occur if the data is not encoded properly, resulting in unreadable codes.
For example, when QR codes are used on tickets for events. The information must be encoded accurately to ensure that it can be scanned and recognized by the ticketing system.
However, if there are encoding errors in the QR code, such incorrect data can lead to ticket validation issues and frustrated event-goers.
Solution
- Ensure that the QR code is encoded correctly. QR codes can use several encoding modes, such as numeric, alphanumeric, and binary. Ensure that the correct mode is used for the information you are trying to encode.
- Use a QR code generator that supports the encoding mode you need to use.
- Check if the QR code contains special characters that may cause encoding errors. If so, try removing those characters.
- If the QR code is part of a larger system, check that the system is set up correctly and that any middleware or APIs used to generate the codes are working correctly.
Damaged Codes
QR codes can become damaged due to wear and tear or improper handling, leading to unreadable codes.
A real-life example of QR code damage can be found in the retail industry. QR codes are sometimes used on products during promotions or to offer discounts. However, if the QR code on the label is damaged, wrinkled, curled, torn, etc., the scanner cannot decode it.
Solution
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Check if the QR code is physically damaged or dirty. If so, try reprinting it (if possible) or cleaning it.
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Also, try using a different QR code scanning solution to see if the problem persists. You can also create your QR code reader using a reputed barcode reader SDK that can easily decode damaged QR codes.
Barcode Scanner SDK – An Effective Solution
A Barcode Scanner SDK is a reliable solution to QR code problems. It provides a reliable and efficient solution for scanning and decoding QR codes. An enterprise-grade barcode scanner SDK can help address quality, size constraints, compatibility, and security concerns.