I created applications using ZXing and ZBar . Both work fine and always read high-quality QR codes .
But the problem is that I scan the code on the card , which is not , which is very nice in quality , it never scans. I even tried using a 5 MP camera device, but the same results. I tried many applications from the Google Play store, but none of them worked. The card is not of such poor quality. Can someone tell me a solution or suggest any other API for this. I know that this is not an API its QR code quality. Any help would be appreciated.
This is a map. Image 
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