QR码从图像文件扫描 [英] QR code scan from image file

问题描述

试图使用像ZXing，ZBar和他们的叉子这样的几个库，但没有找到扫描条形码的方法，而不是从相机而是从文件中扫描。

Tried to use several libraries like ZXing, ZBar and their forks but didn't find way to scan barcode not from camera but from file.

有人能指点我吗向正确的方向？我喜欢ZXing：如何扫描文件中的图像（不是来自相机）。

Can someone point me to right direction? Preferably I'm looking into ZXing: how to scan image from file (not from camera).

请。

推荐答案

最后我找到了解决方案。代码（源自此处）：

In the end I've found solution. Code is (originated from here):

import com.google.zxing.*;

public static String scanQRImage(Bitmap bMap) {
    String contents = null;

    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 MultiFormatReader();
    try {
        Result result = reader.decode(bitmap);
        contents = result.getText();
    }
    catch (Exception e) {
        Log.e("QrTest", "Error decoding barcode", e);
    }
    return contents;
}

Gradle参考为：

Gradle referencing as:

dependencies {
    compile 'com.google.zxing:core:3.2.1'
}

用法：

InputStream is = new BufferedInputStream(new FileInputStream(file));
Bitmap bitmap = BitmapFactory.decodeStream(is);
String decoded=scanQRImage(bitmap);
Log.i("QrTest", "Decoded string="+decoded);

这篇关于QR码从图像文件扫描的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！