4.6每日总结

       建立人脸数据库添加

public  void addFace(String name, AFR_FSDKFace face) {
       try {
           //check if already registered.
           boolean add = true;
           for (FaceRegist frface : mRegister) {
               if (frface.mName.equals(name)) {
                   frface.mFaceList.add(face);
                   add = false;
                   break;
               }
           }
           if (add) { // not registered.
               FaceRegist frface = new FaceRegist(name);
               frface.mFaceList.add(face);
               mRegister.add(frface);
           }

           if (!new File(mDBPath + "/face.txt").exists()) {
               if (!saveInfo()) {
                   Log.e(TAG, "save fail!");
               }
           }

           //save name
           FileOutputStream fs = new FileOutputStream(mDBPath + "/face.txt", true);
           ExtOutputStream bos = new ExtOutputStream(fs);
           bos.writeString(name);
           bos.close();
           fs.close();

           //save feature
           fs = new FileOutputStream(mDBPath + "/" + name + ".data", true);
           bos = new ExtOutputStream(fs);
           bos.writeBytes(face.getFeatureData());
           bos.close();
           fs.close();
       } catch (FileNotFoundException e) {
           e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       }
   }

 

使用loadFaces从文件中读取人脸

public boolean loadFaces(){
       if (loadInfo()) {
           try {
               for (FaceRegist face : mRegister) {
                   Log.d(TAG, "load name:" + face.mName + "'s face feature data.");
                   FileInputStream fs = new FileInputStream(mDBPath + "/" + face.mName + ".data");
                   ExtInputStream bos = new ExtInputStream(fs);
                   AFR_FSDKFace afr = null;
                   do {
                       if (afr != null) {
                           if (mUpgrade) {
                               //upgrade data.
                           }
                           face.mFaceList.add(afr);
                       }
                       afr = new AFR_FSDKFace();
                   } while (bos.readBytes(afr.getFeatureData()));
                   bos.close();
                   fs.close();
               }
               return true;
           } catch (FileNotFoundException e) {
               e.printStackTrace();
           } catch (IOException e) {
               e.printStackTrace();
           }
       } else {
           if (!saveInfo()) {
               Log.e(TAG, "save fail!");
           }
       }
       return false;
   }

绘出人脸框

在List<AFD_FSDKFace>中保存了检测到的人脸的位置信息和深度信息。
我们可以将检测到的人脸位置信息在图片上用一个矩形框绘制出来表示检测到的人脸信息。

Canvas canvas = mSurfaceHolder.lockCanvas();
  if (canvas != null) {
     Paint mPaint = new Paint();
     boolean fit_horizontal = canvas.getWidth() / (float)src.width() < canvas.getHeight() / (float)src.height() ? true : false;
     float scale = 1.0f;
     if (fit_horizontal) {
        scale = canvas.getWidth() / (float)src.width();
        dst.left = 0;
        dst.top = (canvas.getHeight() - (int)(src.height() * scale)) / 2;
        dst.right = dst.left + canvas.getWidth();
        dst.bottom = dst.top + (int)(src.height() * scale);
     } else {
        scale = canvas.getHeight() / (float)src.height();
        dst.left = (canvas.getWidth() - (int)(src.width() * scale)) / 2;
        dst.top = 0;
        dst.right = dst.left + (int)(src.width() * scale);
        dst.bottom = dst.top + canvas.getHeight();
     }
     canvas.drawBitmap(mBitmap, src, dst, mPaint);
     canvas.save();
     canvas.scale((float) dst.width() / (float) src.width(), (float) dst.height() / (float) src.height());
     canvas.translate(dst.left / scale, dst.top / scale);
     for (AFD_FSDKFace face : result) {
        mPaint.setColor(Color.RED);
        mPaint.setStrokeWidth(10.0f);
        mPaint.setStyle(Paint.Style.STROKE);
        canvas.drawRect(face.getRect(), mPaint);
     }
     canvas.restore();
     mSurfaceHolder.unlockCanvasAndPost(canvas);
     break;
  }
}