android ocr——身份证识别的功能实现

package com.dynamsoft.tessocr;  import android.content.Context; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.os.Environment;  import com.googlecode.tesseract.android.TessBaseAPI;  import java.io.File;  /**  * Created by CYL on 2016/3/26.  * email:670654904@qq.com  * 这个类 就是调用 ocr 的接口  * 这个是识别过程是耗时的 操作 请放到线程 操作  */ public class OCR {   private TessBaseAPI mTess;   private boolean flag;   private Context context;   private AssetManager assetManager;    public OCR() {     // TODO Auto-generated constructor stub      mTess = new TessBaseAPI();     String datapath = Environment.getExternalStorageDirectory() + "/tesseract/";     String language = "eng";     //请将你的语言包放到这里 sd 的 tessseract 下的tessdata 下     File dir = new File(datapath + "tessdata/");     if (!dir.exists())       dir.mkdirs();     flag = mTess.init(datapath, language);   }    /**    * 识别出来bitmap 上的文字    * @param bitmap 需要识别的图片    * @return    */   public String getOCRResult(Bitmap bitmap) {     String result = "dismiss langues";     if(flag){       mTess.setImage(bitmap);       result = mTess.getUTF8Text();     }      return result;   }    public void onDestroy() {     if (mTess != null)       mTess.end();   } } 

 /*  * Copyright (C) 2010 ZXing authors  *  * Licensed under the Apache License, Version 2.0 (the "License");  * you may not use this file except in compliance with the License.  * You may obtain a copy of the License at  *  *   http://www.apache.org/licenses/LICENSE-2.0  *  * Unless required by applicable law or agreed to in writing, software  * distributed under the License is distributed on an "AS IS" BASIS,  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  * See the License for the specific language governing permissions and  * limitations under the License.  */  package com.sj.app.decoding;  import android.graphics.Bitmap; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.util.Log;  import com.dynamsoft.tessocr.OCR; import com.google.zxing.BinaryBitmap; import com.google.zxing.DecodeHintType; import com.google.zxing.MultiFormatReader; import com.google.zxing.ReaderException; import com.google.zxing.Result; import com.google.zxing.common.HybridBinarizer; import com.sj.app.camera.CameraManager; import com.sj.app.camera.PlanarYUVLuminanceSource; import com.sj.app.utils.IdMatch; import com.sj.erweima.MipcaActivityCapture; import com.sj.erweima.R;  import java.util.Hashtable; import java.util.List;  final class DecodeHandler extends Handler {    private static final String TAG = DecodeHandler.class.getSimpleName();    private final MipcaActivityCapture activity;   private final MultiFormatReader multiFormatReader;    DecodeHandler(MipcaActivityCapture activity,          Hashtable<DecodeHintType, Object> hints) {     multiFormatReader = new MultiFormatReader();     multiFormatReader.setHints(hints);     this.activity = activity;   }    @Override   public void handleMessage(Message message) {     switch (message.what) {       case R.id.decode:         // Log.d(TAG, "Got decode message");         decode((byte[]) message.obj, message.arg1, message.arg2);         break;       case R.id.quit:         Looper.myLooper().quit();         break;     }   }    /**    * Decode the data within the viewfinder rectangle, and time how long it    * took. For efficiency, reuse the same reader objects from one decode to    * the next.    *    * @param data    *      The YUV preview frame.    * @param width    *      The width of the preview frame.    * @param height    *      The height of the preview frame.    */   private void decode(byte[] data, int width, int height) {     long start = System.currentTimeMillis();     Result rawResult = null;      // modify here     byte[] rotatedData = new byte[data.length];     for (int y = 0; y < height; y++) {       for (int x = 0; x < width; x++)         rotatedData[x * height + height - y - 1] = data[x + y * width];     }     int tmp = width; // Here we are swapping, that's the difference to #11     width = height;     height = tmp;      PlanarYUVLuminanceSource source = CameraManager.get()         .buildLuminanceSource(rotatedData, width, height);     BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));     try {       //相机中捕捉到的       Bitmap image = source.renderCroppedGreyscaleBitmap();       doorc(source);       rawResult = multiFormatReader.decodeWithState(bitmap);     } catch (ReaderException re) {       // continue     } finally {       multiFormatReader.reset();     }      if (rawResult != null) {       long end = System.currentTimeMillis();       Log.d(TAG, "Found barcode (" + (end - start) + " ms):/n"           + rawResult.toString());       Message message = Message.obtain(activity.getHandler(),           R.id.decode_succeeded, rawResult);       Bundle bundle = new Bundle();       bundle.putParcelable(DecodeThread.BARCODE_BITMAP,           source.renderCroppedGreyscaleBitmap());       message.setData(bundle);       // Log.d(TAG, "Sending decode succeeded message...");       message.sendToTarget();     } else {       Message message = Message.obtain(activity.getHandler(),           R.id.decode_failed);       message.sendToTarget();     }   }   private Handler handler = new Handler(){     public void handleMessage(Message msg) {       CardId cardId = (CardId) msg.obj;       if(cardId != null){         Message message = Message.obtain(activity.getHandler(),             R.id.decode_succeeded, cardId.id);         Bundle bundle = new Bundle();         bundle.putParcelable(DecodeThread.BARCODE_BITMAP,             cardId.bitmap);         message.setData(bundle);         // Log.d(TAG, "Sending decode succeeded message...");         message.sendToTarget();       }     };   };   private void doorc(final PlanarYUVLuminanceSource source) {     new Thread(new Runnable() {       @Override       public void run() {         Bitmap bitmap = source.renderCroppedGreyscaleBitmap();         String id = new OCR().getOCRResult(bitmap);         if(id != null){           List<String> list = IdMatch.machId(id);           if(list!= null && list.size()>0){             String cardId = list.get(0);             if(cardId != null){               Message msg = Message.obtain();               CardId cardId2 = new CardId(cardId, bitmap);               msg.obj = cardId2;               handler.sendMessage(msg);             }           }         }        }     }).start();   }   public class CardId{     private String id;     private Bitmap bitmap;     public CardId(String id, Bitmap bitmap) {       super();       this.id = id;       this.bitmap = bitmap;     }     public String getId() {       return id;     }     public void setId(String id) {       this.id = id;     }     public Bitmap getBitmap() {       return bitmap;     }     public void setBitmap(Bitmap bitmap) {       this.bitmap = bitmap;     }    }  } 

public Rect getFramingRect() {   Point screenResolution = configManager.getScreenResolution();   if (framingRect == null) {    if (camera == null) {     return null;    }    int width = screenResolution.x * 7 / 8;    if (width < MIN_FRAME_WIDTH) {     width = MIN_FRAME_WIDTH;    } else if (width > MAX_FRAME_WIDTH) { //    width = MAX_FRAME_WIDTH;    }    int height = screenResolution.y * 3 / 4;    if (height < MIN_FRAME_HEIGHT) {     height = MIN_FRAME_HEIGHT;    } else if (height > MAX_FRAME_HEIGHT) {     height = MAX_FRAME_HEIGHT;    }    int leftOffset = (screenResolution.x - width) / 2;    int topOffset = (screenResolution.y - height) / 2;    framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);    Log.d(TAG, "Calculated framing rect: " + framingRect);   }   return framingRect;  }