QR decode from Zxing on iOS

Hi,
I’m trying to use this one http://ydaira.blogspot.co.il/2012/05/how-to-decode-qr-code-using-unity3d.html
With reading from WebCamTexture on iOS, though getting an error from the zxing dll when trying to decode:

ReaderException: Exception of type ‘com.google.zxing.ReaderException’ was thrown.
at com.google.zxing.common.GlobalHistogramBinarizer.estimateBlackPoint (System.Int32 buckets) [0x00000] in :0
at com.google.zxing.common.GlobalHistogramBinarizer.get_BlackMatrix () [0x00000] in :0
at com.google.zxing.common.HybridBinarizer.binarizeEntireImage () [0x00000] in :0
at com.google.zxing.common.HybridBinarizer.get_BlackMatrix () [0x00000] in :0
at com.google.zxing.BinaryBitmap.get_BlackMatrix () [0x00000] in :0
at com.google.zxing.qrcode.QRCodeReader.decode (com.google.zxing.BinaryBitmap image, System.Collections.Hashtable hints) [0x00000] in :0
at com.google.zxing.qrcode.QRCodeReader.decode (System.SByte d, Int32 W, Int32 H) [0x00000] in :0
at qrCam.DecodeQR () [0x00000] in :0
at qrCam.Update () [0x00000] in :0
(Filename: Line: -1)

Any ideas…?

If you are looking for iOS ZXing.Net decoding feature only, you can take a look in my Github fork of ZXing.Net

There is a working example of how iOS decodes QR from WebTexture under Unity.