android opencv人脸检测程序

今天用Android 纯Java opencv测试了一下人脸检测速度，首先搭建opencvAndroid开发环境见

http://jingyan.baidu.com/article/948f592448183bd80ff5f9d1.html

搭好环境开始简单编程，尽管opencv在Android上检测速度确实有待提高还是贴上源码（本人于小米手机测试OK 三星手机貌似有点问题）

MainActivity.java

package com.example.facedec;

import android.support.v7.app.ActionBarActivity;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import org.opencv.android.BaseLoaderCallback;

import org.opencv.android.LoaderCallbackInterface;

import org.opencv.android.OpenCVLoader;

import org.opencv.android.Utils;

import org.opencv.core.Core;

import org.opencv.core.Mat;

import org.opencv.core.MatOfRect;

import org.opencv.core.Scalar;

import org.opencv.imgproc.Imgproc;

import org.opencv.objdetect.CascadeClassifier;

import android.os.Bundle;

import android.provider.MediaStore.Images.ImageColumns;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Bitmap.Config;

import android.graphics.BitmapFactory.Options;

import android.graphics.Point;

import android.graphics.Rect;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

final private static String TAG = "StaticrecognitionActivity";

final private int PICTURE_CHOOSE = 1;

private ImageView imageView = null;

private Bitmap img = null;

private Button buttonDetect = null;

private TextView textView = null;

private EditText editText = null;

// OpenCV类库加载并初始化成功后的回调函数，在此我们不进行任何操作

private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {

@Override

public void onManagerConnected(int status) {

switch (status) {

case LoaderCallbackInterface.SUCCESS: {

}

break;

default: {

super.onManagerConnected(status);

}

break;

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button button = (Button) this.findViewById(R.id.button1);

button.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

// get a picture form your phone

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);

photoPickerIntent.setType("image/*");

startActivityForResult(photoPickerIntent, PICTURE_CHOOSE);

}

});

//editText = (EditText) this.findViewById(R.id.editText1);

textView = (TextView) this.findViewById(R.id.textView1);

buttonDetect = (Button) this.findViewById(R.id.button2);

// buttonDetect.setVisibility(View.INVISIBLE);

buttonDetect.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

textView.setText("Waiting ...");

String xmlfilePath = "//sdcard//haarcascade_frontalface_alt2.xml";

CascadeClassifier faceDetector = new CascadeClassifier(

xmlfilePath);

// Bitmap bmptest = BitmapFactory.decodeResource(getResources(),

// R.drawable.lena);

Mat testMat = new Mat();

Utils.bitmapToMat(img, testMat);

// Detect faces in the image.

// MatOfRect is a special container class for Rect.

MatOfRect faceDetections = new MatOfRect();

faceDetector.detectMultiScale(testMat, faceDetections);

Log.i(String.format("Detected %s faces",

faceDetections.toArray().length), "");

int facenum = 0;

// Draw a bounding box around each face.

for (org.opencv.core.Rect rect : faceDetections.toArray()) {

Core.rectangle(

testMat,

new org.opencv.core.Point(rect.x, rect.y),

new org.opencv.core.Point(rect.x + rect.width, rect.y + rect.height),

new Scalar(255, 0, 0));

++facenum;

}

// Save the visualized detection.

// Bitmap bmpdone = Bitmap.createBitmap(bmptest.getWidth(),

// bmptest.getHeight(), Config.RGB_565);

Utils.matToBitmap(testMat, img);

imageView.setImageBitmap(img);

textView.setText("Facecount:" + facenum);

}

});

imageView = (ImageView) this.findViewById(R.id.image_view);

imageView.setImageBitmap(img);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// Handle action bar item clicks here. The action bar will

// automatically handle clicks on the Home/Up button, so long

// as you specify a parent activity in AndroidManifest.xml.

int id = item.getItemId();

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

@Override

protected void onActivityResult(int requestCode, int resultCode,

Intent intent) {

super.onActivityResult(requestCode, resultCode, intent);

// the image picker callback

if (requestCode == PICTURE_CHOOSE) {

if (intent != null) {

Cursor cursor = getContentResolver().query(intent.getData(), null, null, null, null);

cursor.moveToFirst();

int idx = cursor.getColumnIndex(ImageColumns.DATA);

String fileSrc = cursor.getString(idx);

Options options = new Options();

options.inJustDecodeBounds = true;

img = BitmapFactory.decodeFile(fileSrc, options);

options.inSampleSize = Math.max(1, (int) Math.ceil(Math.max(

(double) options.outWidth / 1024f,

(double) options.outHeight / 1024f)));

options.inJustDecodeBounds = false;

img = BitmapFactory.decodeFile(fileSrc, options);

textView.setText("Clik Detect. ==>");

imageView.setImageBitmap(img);

buttonDetect.setVisibility(View.VISIBLE);

} else {

Log.d(TAG, "idButSelPic Photopicker canceled");

}

}

}

@Override

public void onResume() {

super.onResume();

// 通过OpenCV引擎服务加载并初始化OpenCV类库，所谓OpenCV引擎服务即是

// OpenCV_2.4.10_Manager_2.4_*.apk程序包，存在于OpenCV安装包的apk目录中

OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_10, this,

mLoaderCallback);

}

}

整体项目源码见