On Tuesday, December 26, 2017 at 1:57:30 AM UTC+1, Sean Owen wrote:
> The printed barcode looks a bit corrupted, like the modules aren't of equal width. It could be an artifact of the image too, like the blur on other images.
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> However, I think the real reason may be that they are "old" QR codes (not the 2005 spec). I am not sure, but the third one's border sure reminds me of how they look, which is subtly different. That format isn't supported by this library.
Thanks Sean for the reply! These codes are generated recently by using the Zxing library too. I use a package in Matlab (https://ch.mathworks.com/matlabcentral/fileexchange/49808-qr-code-generator-1-1-based-on-zxing).
It's also very strange for me that some codes that can be decoded by Zxing online decoder but not in MatLab when I used the wrap-up package. Here I attached a small picture to show. I don't understand why, as the library is the same, right?