How to determine the QR code is positive and there is no rotation

[Buding]

How to determine the QR code is positive and there is no rotation

[Lachezar Dobrev]

AFAIK there is no out-of-the-box solution.
You *might* use the result meta-data and check the relative location
of the three result-point corners.
Also the colour at (or around) the three result-points should tell
you if the code was positive or negative.

Haven't tested that, but it seems the DecoderResult.getOther() will
return a QRCodeDecoderMetaData when the QR Code was mirrored.

2018-04-20 9:37 GMT+03:00 Buding <10633...@qq.com>:
> How to determine the QR code is positive and there is no rotation
>

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[M M]

Hi Lachezar,

how can i get   access to  the result meta-data and see check the relative location 
of the three result-point corners?

I am writing my solution in C#

Thanks a lot.

Diego Mitchell.

El viernes, 20 de abril de 2018, 9:47:10 (UTC-3), Lachezar Dobrev escribió:

 AFAIK there is no out-of-the-box solution.
  You *might* use the result meta-data and check the relative location
of the three result-point corners.
  Also the colour at (or around) the three result-points should tell
you if the code was positive or negative.

  Haven't tested that, but it seems the DecoderResult.getOther() will
return a QRCodeDecoderMetaData when the QR Code was mirrored.

2018-04-20 9:37 GMT+03:00 Buding <10633...@qq.com>:
> How to determine the QR code is positive and there is no rotation
>
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> You received this message because you are subscribed to the Google Groups "zxing" group.

> To unsubscribe from this group and stop receiving emails from it, send an email to zx...@googlegroups.com.

[Lachezar Dobrev]

I am not proficient with C#.
I'll assume you're using the ZXing.Net port.

From the source code it looks like the Result[1] from the decoding
process has an array with the key points[2]. It also looks like there
is meta-data[3] too.

1: https://github.com/micjahn/ZXing.Net/blob/master/Source/lib/Result.cs
2: public ResultPoint[] ResultPoints { get; private set; }
3: public IDictionary<ResultMetadataType, object> ResultMetadata {
get; private set; }

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