java用zxing读取图片当中的条形码

Question

请教个问题：一张图片当中在不固定位置包含有条形码，怎么读取条形码出来呢？怎么读取一张图片中的多个条形码？用zxing读取图片当中的条形码，报错com.google.zxing.NotFoundException。有大神知道的吗？谢谢

Answer 1

首先把图像读到BufferedImage

import java.awt.image.*;
import javax.imageio.ImageIO;
BufferedImage image = null;
        try {
            image = ImageIO.read(new File(filename));
        } catch (IOException e) {
            System.out.println(e);
            return;
        }

然后转换成BinaryBitmap传给ZXing

BinaryBitmap bitmap = null;
int[] pixels = image.getRGB(0, 0, image.getWidth(), image.getHeight(), null, 0, image.getWidth());
RGBLuminanceSource source = new RGBLuminanceSource(image.getWidth(), image.getHeight(), pixels);
bitmap = new BinaryBitmap(new HybridBinarizer(source));

MultiFormatReader reader = new MultiFormatReader();  
GenericMultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);
        try {
            Result[] zxingResults = multiReader.decodeMultiple(bitmap);
        } catch (NotFoundException e) {
            e.printStackTrace();
        }
        pixels = null;
        bitmap = null;

完整代码
https://github.com/yushulx/java-barcode-command-gui-web