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I am currently developing a scanner that reads multiple QR codes found in one image. I manage to read the QR codes in the image but it's giving me inconsistent results. Assuming there are 4 QR codes in the image, sometimes I can read 2 and sometimes 3 or just 1. Unlike in the original scanner (ZXing Scanner) it decodes fast. While in my case, I have to make sure there is enough light and the image is not blurred to decode it. I am using the QRCodeMultiReader to decode the image. Currently using ZXing Library to create the application. Below is the snippet of my code: public void onPictureTaken(byte[] data, Camera camera) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inMutable = true; Bitmap bitmap = BitmapFactory .decodeByteArray(data, 0, data.length, opt); Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(); hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE); LuminanceSource source = new RGBLuminanceSource(bitmap); QRCodeMultiReader multiReader = new QRCodeMultiReader(); Result[] results = multiReader.decodeMultiple(new BinaryBitmap( new HybridBinarizer(source)), hints); }

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