android opencv 座標を返す

私はandroidstudioでアプリ開発を行っています。

私が書いたプログラムはカメラで撮っている映像の中に映る赤い物の中心に点を描画する物です。

この中心点の座標を獲得したいのですがどうすればいいでしょうか？Pointをintなどに変換できるのでしょうか？

こちらを参考にしてopencvをandroidに導入した後
以下のコードをそれぞれコピペしてXXXと書かれている部分を直してもらえれば実際に使えるようになると思います。

#MainActivity.java

java
1package com.example.XXX.XXX;
2
3import android.app.Activity;
4import android.os.Bundle;
5import android.util.Log;
6import android.view.MenuItem;
7import android.view.SurfaceView;
8import android.view.WindowManager;
9import org.opencv.android.BaseLoaderCallback;
10import org.opencv.android.CameraBridgeViewBase;
11import org.opencv.android.LoaderCallbackInterface;
12import org.opencv.android.OpenCVLoader;
13import org.opencv.core.Core;
14import org.opencv.core.CvType;
15import org.opencv.core.Mat;
16import org.opencv.core.MatOfInt;
17import org.opencv.core.MatOfInt4;
18import org.opencv.core.MatOfPoint;
19import org.opencv.core.MatOfPoint2f;
20import org.opencv.core.Point;
21import org.opencv.core.RotatedRect;
22import org.opencv.core.Scalar;
23import org.opencv.core.Size;
24import org.opencv.imgproc.Imgproc;
25import org.opencv.imgproc.Moments;
26
27
28import java.util.ArrayList;
29import java.util.List;
30
31
32import static org.opencv.core.CvType.CV_8U;
33import static org.opencv.core.CvType.CV_8UC1;
34import static org.opencv.core.CvType.CV_8UC3;
35
36
37public class MainActivity extends Activity implements CameraBridgeViewBase.CvCameraViewListener {
38    private static final String TAG = "OCVSample::Activity";
39
40    int i =0;
41
42    private CameraBridgeViewBase mOpenCvCameraView;
43    private boolean mIsJavaCamera = true;
44    private MenuItem mItemSwitchCamera = null;
45
46
47    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
48        @Override
49        public void onManagerConnected(int status) {
50            switch (status) {
51                // 読み込みが成功したらカメラプレビューを開始
52                case LoaderCallbackInterface.SUCCESS:
53                {
54                    Log.i(TAG, "OpenCV loaded successfully");
55                    mOpenCvCameraView.enableView();
56                } break;
57                default: {
58                    super.onManagerConnected(status);
59                }break;
60            }
61        }
62    };
63
64    public MainActivity() {
65        Log.i(TAG, "Instantiated new " + this.getClass());
66    }
67
68    @Override
69    protected void onCreate(Bundle savedInstanceState) {
70        Log.i(TAG, "called onCreate");
71        super.onCreate(savedInstanceState);
72        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
73        setContentView(R.layout.activity_main);
74
75        mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.camera_view);
76
77        mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
78
79        mOpenCvCameraView.setCvCameraViewListener(this);
80    }
81
82    @Override
83    protected void onPause() {
84        super.onPause();
85        if (mOpenCvCameraView != null)
86            mOpenCvCameraView.disableView();
87    }
88
89    @Override
90    protected void onResume() {
91        super.onResume();
92        if (!OpenCVLoader.initDebug()) {
93            Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
94            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
95        } else {
96            Log.d(TAG, "OpenCV library found inside package. Using it!");
97            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
98        }
99    }
100
101
102    @Override
103    protected void onDestroy() {
104        super.onDestroy();
105        if (mOpenCvCameraView != null)
106            mOpenCvCameraView.disableView();
107    }
108
109
110    @Override
111    public void onCameraViewStarted(int width, int height) {// カメラプレビュー開始時に呼ばれる
112    }
113
114    @Override
115    public void onCameraViewStopped() {// カメラプレビュー終了時に呼ばれる
116    }
117
118    @Override
119    public Mat onCameraFrame(Mat inputFrame) {
120        Mat src = inputFrame;
121        Mat src1 = src.clone();
122        Imgproc.cvtColor(src, src, Imgproc.COLOR_RGB2HSV);//HSVに変換
123        Imgproc.medianBlur(src, src, 5);
124        Core.inRange(src, new Scalar(150,100,100),new Scalar(180,255,255),src);
125        Mat hierarchy=Mat.zeros(new Size(5,5), CvType.CV_8UC1);
126        List<MatOfPoint> contours = new ArrayList<MatOfPoint>();
127        Imgproc.findContours(src, contours, hierarchy, Imgproc.RETR_EXTERNAL, Imgproc.CHAIN_APPROX_TC89_L1);
128        Scalar color=new Scalar(200,20,100);
129       // Imgproc.drawContours(src1, contours, -1, color,10);
130        int i=0;
131        int index = -1;
132        double area = 0;
133        for(i=0;i<contours.size();i++)
134        {
135            double tmp = Imgproc.contourArea(contours.get(i));
136            if (area < tmp) {
137                area = tmp;
138                index = i;
139            }
140        }
141        if (index != -1) {
142            MatOfPoint ptmat= contours.get(index);
143             color=new Scalar(0,200,0);
144            MatOfPoint2f ptmat2 = new MatOfPoint2f( ptmat.toArray() );
145            RotatedRect bbox=Imgproc.minAreaRect(ptmat2);
146            Imgproc.circle(src1, bbox.center,5, color,-1);
147        }
148        return src1;
149    }
150
151}
152

#activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:opencv="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:keepScreenOn="true"
    tools:context="com.example.XXX.XXX.MainActivity">

    <org.opencv.android.JavaCameraView
        android:id="@+id/camera_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:visibility="visible"
        opencv:camera_id="any"
        opencv:show_fps="true" />


</RelativeLayout>