OpenCV: QR Code detection and extraction

QR Code detection and extraction using OpenCV.
Source Code and More information here -

[kpkp]

This is impressive, and I really like the use of enhancing color on the live image to highlight the QR Code - Nicely done!

[virgill]

hi, I want to use this to detect multiple qr codes and their orientation. I am not sure how I should modify your example in order to do this. My first concern is that the code will detect multiple corners (more that 3) and will not group the right ones together. could you give me some hints? Also, is there an out-of-the-box way to decode one qr code? at the end of the while to pass the resulted qr-code to a method and receive the info? thanks a lot for sharing this! great work

[RajKumar-zzwg]

hello bharat .. i have developed a new kind of image (like a qr code). it does have the 3 squares at the boundary and i am implementing this for the android platform. it would be fine if the camera just detect that three squares and take the image. so can you suggest something for that?

[yashchaturvedi]

what if the qr code is very small and far away will it be able to detect it ??

[pariafarsad]

thanks a lot for the video... I have a question in the codes, in Image file codes, you have written: capture>>Image // capture image from image input  what kind of command should I use to capture it, because it shows error, and also I should say that I am new in c++ programming.
thanks,

[MdYusuf]

Thank you very much. I have converted your code with emgu cv in c#. Its works fine for small data but does not work for more data like 500 character. Can you guys help me to do better for 500 character. thanks.

[preethychowdary]

Can anyone have idea about how to correct the distortion from the qr code image? Any idea or suggestion please