android 人脸识别
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android的人脸识别目前为上(4.2)只能进行人脸的识别,而不能进行人脸的对比。
下面是具体代码
package com.example.facedetectdemo;import java.io.IOException;import android.app.Activity;import android.content.pm.ActivityInfo;import android.graphics.PixelFormat;import android.graphics.Point;import android.hardware.Camera;import android.hardware.Camera.CameraInfo;import android.hardware.Camera.Face;import android.hardware.Camera.FaceDetectionListener;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.ViewGroup.LayoutParams;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;public class AndroidCamera extends Activity implements SurfaceHolder.Callback{ Camera camera; SurfaceView surfaceView; SurfaceHolder surfaceHolder; boolean previewing = false; LayoutInflater controlInflater = null; Button buttonTakePicture; TextView prompt; final int RESULT_SAVEIMAGE = 0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); getWindow().setFormat(PixelFormat.UNKNOWN); surfaceView = (SurfaceView)findViewById(R.id.camerapreview); surfaceHolder = surfaceView.getHolder(); surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); controlInflater = LayoutInflater.from(getBaseContext()); View viewControl = controlInflater.inflate(R.layout.control, null); LayoutParams layoutParamsControl = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); this.addContentView(viewControl, layoutParamsControl); buttonTakePicture = (Button)findViewById(R.id.takepicture); LinearLayout layoutBackground = (LinearLayout)findViewById(R.id.background); prompt = (TextView)findViewById(R.id.prompt); } FaceDetectionListener faceDetectionListener = new FaceDetectionListener(){ @Override public void onFaceDetection(Face[] faces, Camera camera) { if (faces.length == 0){ prompt.setText(" No Face Detected! "); }else{ prompt.setText(String.valueOf(faces.length) + " Face Detected :) "); Log.i("faceScore", faces[0].score+""); Point leftEye = faces[0].leftEye; // leftEye } }}; @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {// // TODO Auto-generated method stub if(previewing){ camera.stopFaceDetection(); camera.stopPreview(); previewing = false; } if (camera != null){ try { camera.setPreviewDisplay(surfaceHolder); camera.startPreview(); prompt.setText(String.valueOf( "Max Face: " + camera.getParameters().getMaxNumDetectedFaces())); camera.startFaceDetection(); previewing = true; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub camera = Camera.open(CameraInfo.CAMERA_FACING_FRONT); camera.setFaceDetectionListener(faceDetectionListener); } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub camera.stopFaceDetection(); camera.stopPreview(); camera.release(); camera = null; previewing = false; } Camera.FaceDetectionListener faceDetionListener = new Camera.FaceDetectionListener() {@Overridepublic void onFaceDetection(Face[] faces, Camera camera) {// TODO Auto-generated method stub}};}
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