ZXing转换成位图BinaryBitmap [英] ZXing convert Bitmap to BinaryBitmap

问题描述

我使用的OpenCV和Zxing，我想补充的二维code扫描。我有几个类型，我可以发送图像。也许最好的是Bitmat（另一种选择是OpenCV的垫）。

I am using OpenCV and Zxing, and I'd like to add 2d code scanning. I have a few types of images that I could send. Probably the best is Bitmat (the other option is OpenCV Mat).

看起来你曾经是能够将这样的：

It looks like you used to be able to convert like this:

Bitmap frame = //this is the frame coming in

LuminanceSource source = new RGBLuminanceSource(frame);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

//then I can use reader.decode(bitmap) to decode the BinaryBitmap

然而，RGBLuminaceSource看起来它不再需要的位图作为输入。因此，如何还能将输入图像I转换为BinaryBitmap ???

However, RGBLuminaceSource looks like it no longer takes a bitmap as an input. So how else can I convert an input image to BinaryBitmap???

好了，所以我相信我已经取得了一些进展，但我仍然有一个问题。我想我有code，它转换成位图格式是否正确，但我现在得到一个的ArrayIndexOutOfBounds

Ok so I believe I've made some progress, but I'm still having an issue. I think I have the code that converts the Bitmap into the correct format, however I am now getting an arrayIndexOutOfBounds

public void zxing(){
    Bitmap bMap = Bitmap.createBitmap(frame.width(), frame.height(), Bitmap.Config.ARGB_8888);
    Utils.matToBitmap(frame, bMap);
    byte[] array = BitmapToArray(bMap);
    LuminanceSource source = new PlanarYUVLuminanceSource(array, bMap.getWidth(), bMap.getHeight(), 0, 0, bMap.getWidth(), bMap.getHeight(), false);

    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    Reader reader = new DataMatrixReader();
    String sResult = "";
    try {
        Result result = reader.decode(bitmap);
        sResult = result.getText();
        Log.i("Result", sResult);
        }
    catch (NotFoundException e) {
            Log.d(TAG, "Code Not Found");
            e.printStackTrace();
    }
}

public byte[] BitmapToArray(Bitmap bmp){
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bmp.compress(Bitmap.CompressFormat.JPEG, 50, stream);
    byte[] byteArray = stream.toByteArray();
    return byteArray;
}

我得到的错误

I get the error

02-14 10:19:27.469: E/AndroidRuntime(29736): java.lang.ArrayIndexOutOfBoundsException: length=33341; index=34560 02-14 10:19:27.469: E/AndroidRuntime(29736):   at 
com.google.zxing.common.HybridBinarizer.calculateBlackPoints(HybridBinarizer.java:199)

我已经登录的字节[]的大小，它是上面所示的长度。我无法弄清楚，为什么zxing期待它更大

I have logged the size of the byte[], and it is the length shown above. I cant figure out why zxing is expecting it to be bigger

推荐答案

好吧，我知道了。肖恩欧文说，PlanarYUVLuminaceSource只会是默认的Andr​​oid摄像头格式，这是我猜的OpenCV不使用。因此，在短期，这里是你将如何做到这一点：

Ok I got it. As Sean Owen said, PlanarYUVLuminaceSource would only be for the default android camera format, which I guess OpenCV does not use. So in short, here is how you would do it:

//(note, mTwod is the CV Mat that contains my datamatrix code)

Bitmap bMap = Bitmap.createBitmap(mTwod.width(), mTwod.height(), Bitmap.Config.ARGB_8888);
Utils.matToBitmap(mTwod, bMap);
int[] intArray = new int[bMap.getWidth()*bMap.getHeight()];  
//copy pixel data from the Bitmap into the 'intArray' array  
bMap.getPixels(intArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(), bMap.getHeight());  

LuminanceSource source = new RGBLuminanceSource(bMap.getWidth(), bMap.getHeight(),intArray);

BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Reader reader = new DataMatrixReader();     
//....doing the actually reading
Result result = reader.decode(bitmap);

所以完蛋了，不难的。刚把到Android位图转换为整数数组，它的一块蛋糕。

So thats it, not hard at all. Just had to convert the Android Bitmap to an integer array, and its a piece of cake.

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