Solution
At the
Settings tab, you could use
Suggest Values to adjust the parameters for searching.
If you still cannot detect QR, you have to check whether your QR code complies with QR code standard or not. Even though the QR code works with one tools does not mean the quality is good enough to work with all QR software.
The following factors can cause errors in the search and decoding phases or 2D code recognition:
- Very low resolution of the image.
- Very high horizontal or vertical light drift.
- Contrast along the bars of the image.
- High level of noise or blurring.
- Inconsistent printing or stamping techniques, such as misaligned code elements, inconsistent element size, or elements with inconsistent borders.
- In PDF417 codes, a quiet zone that is too small or contains too much noise.