Android 裁剪人脸类的实例代码

public final class FaceCj {
  private static BitmapFactory.Options BitmapFactoryOptionsbfo;
  private static ByteArrayOutputStream out;
  private static byte[] data;
  private static FaceDetector.Face[] myFace;
  private static FaceDetector myFaceDetect;
  private static int tx = 0;
  private static int ty = 0;
  private static int bx = 0;
  private static int by = 0;
  private static int width = 0;
  private static int height = 0;
  private static float wuchax = 0;
  private static float wuchay = 0;
  private static FaceDetector.Face face;
  private static PointF myMidPoint;
  private static float myEyesDistance;
  private static List<String> facePaths;
  private static String facePath;
  public static Bitmap cutFace(Bitmap bitmap, Context context) {
    facePaths = null;
    BitmapFactoryOptionsbfo = new BitmapFactory.Options();
    BitmapFactoryOptionsbfo.inPreferredConfig = Bitmap.Config.RGB_565; // 构造位图生成的参数，必须为565。类名+enum
    out = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 50, out);
    data = out.toByteArray();
    bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,
        BitmapFactoryOptionsbfo);
    try {
      out.flush();
      out.close();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    width = bitmap.getWidth();
    height = bitmap.getHeight();
    myFace = new FaceDetector.Face[5]; // 分配人脸数组空间
    myFaceDetect = new FaceDetector(bitmap.getWidth(), bitmap.getHeight(), 5);
    int numberOfFaceDetected = myFaceDetect.findFaces(bitmap, myFace);
    if (numberOfFaceDetected <= 0) {// FaceDetector构造实例并解析人脸
      bitmap.recycle();
      return null;
    }
    facePaths = new ArrayList<String>();
    for (int i = 0; i < numberOfFaceDetected; i++) {
      face = myFace[i];
      myMidPoint = new PointF();
      face.getMidPoint(myMidPoint);
      myEyesDistance = face.eyesDistance();  //得到人脸中心点和眼间距离参数，并对每个人脸进行画框
      wuchax = myEyesDistance / 2 + myEyesDistance;
      wuchay = myEyesDistance * 2 / 3 + myEyesDistance;
      if (myMidPoint.x - wuchax < 0) {//判断左边是否出界
        tx = 0;
      } else {
        tx = (int) (myMidPoint.x - wuchax);
      }
      if (myMidPoint.x + wuchax > width) {//判断右边是否出界
        bx = width;
      } else {
        bx = (int) (myMidPoint.x + wuchax);
      }
      if (myMidPoint.y - wuchay < 0) {//判断上边是否出界
        ty = 0;
      } else {
        ty = (int) (myMidPoint.y - wuchay);
      }
      if (myMidPoint.y + wuchay > height) {//判断下边是否出界
        by = height;
      } else {
        by = (int) (myMidPoint.y + wuchay);
      }
      try {
        return Bitmap.createBitmap(bitmap, tx, ty, bx - tx, by - ty);//这里可以自行调整裁剪宽高
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    bitmap.recycle();
    return bitmap;
  }
}