opencv + 微信二维码识别

package opencv453; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.QRCodeWriter; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; import sun.misc.BASE64Decoder; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.File; import java.io.IOException; import java.nio.file.FileSystems; import java.nio.file.Path; import java.util.HashMap; import java.util.Hashtable; import java.util.Map; /** * 二维码相关操作 * Created by leo. */ public class QRCodeGenerator { private static final int margin = 0; private static final String QR_CODE_IMAGE_PATH = "C:/photo/MyQRCode.png"; private static void generateQRCodeImage(String text, int width, int height, String filePath) throws WriterException, IOException { QRCodeWriter qrCodeWriter = new QRCodeWriter(); BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height); Path path = FileSystems.getDefault().getPath(filePath); MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path); } /** * 生成二维码(黑白色) * @param text 扫描二维码的内容 * @param width 宽 * @param height 长 * @return * @throws Exception */ public static BufferedImage qRCodeCommon(String text, int width, int height)throws Exception{ Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(); hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); // 指定编码方式,防止中文乱码 hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); // 指定纠错等级 hints.put(EncodeHintType.MARGIN, margin); // 指定二维码四周白色区域大小 BitMatrix bitMatrix = null; try { bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints); } catch (WriterException e) { e.printStackTrace(); } return MatrixToImageWriter.toBufferedImage(bitMatrix); } /** * 解析二维码解析,此方法是解析Base64格式二维码图片 * baseStr:base64字符串,data:image/png;base64开头的 */ public static String deEncodeByBase64(String baseStr) { String content = null; BufferedImage image; BASE64Decoder decoder = new BASE64Decoder(); byte[] b=null; try { int i = baseStr.indexOf("data:image/png;base64,"); baseStr = baseStr.substring(i+"data:image/png;base64,".length());//去掉base64图片的data:image/png;base64,部分才能转换为byte[] b = decoder.decodeBuffer(baseStr);//baseStr转byte[] ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(b);//byte[] 转BufferedImage image = ImageIO.read(byteArrayInputStream); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints);//解码 System.out.println("图片中内容： "); System.out.println("content： " + result.getText()); content = result.getText(); } catch (IOException e) { e.printStackTrace(); } catch (NotFoundException e) { e.printStackTrace(); } return content; } /** * 解析二维码,此方法解析一个路径的二维码图片 * path:图片路径 */ public static String deEncodeByPath(String path) { String content = null; BufferedImage image; try { image = ImageIO.read(new File(path)); LuminanceSource source = new BufferedImageLuminanceSource(image); Binarizer binarizer = new HybridBinarizer(source); BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer); Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>(); hints.put(DecodeHintType.CHARACTER_SET, "UTF-8"); Result result = new MultiFormatReader().decode(binaryBitmap, hints);//解码 System.out.println("图片中内容： "); System.out.println("content： " + result.getText()); content = result.getText(); } catch (IOException e) { e.printStackTrace(); } catch (NotFoundException e) { e.printStackTrace(); } return content; } public static void main(String[] args) { try { //String info="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1575540267760&di=e8b961051b3ab58538e092c5e1be87a1&imgtype=0&src=http%3A%2F%2Fg.hiphotos.baidu.com%2Fzhidao%2Fpic%2Fitem%2Fb8389b504fc2d56263697b8ce51190ef76c66c6a.jpg"; String info="D:\\1_work\\code\\wechatDemo\\src\\opencv453\\fail\\d.jpg"; deEncodeByPath(info); } catch (Exception e) { System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage()); } } }