It is recommended to improve the fault tolerance or anti-jamming ability of identifying QR codes from the gallery.

[meiMingle]

For example, in the picture above, the content cannot be recognized from the gallery, but the recognition from the camera is normal.

[markusfisch]

Thanks for pointing this out! I'd like to improve detection for this scenario very much.

The reason why it works from the camera is that the app (or rather ZXing) gets a lot of images. Eventually there will be a good one. Scanning a static image on the other hand means we only have one try.

Now it is possible to make the app automatically rotate a static image a bit to generate more samples and thus increase the probability of successful detection. Will try.