ORBtryout

package com.example.mysecondopencvapplication;

import android.graphics.Bitmap;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;

import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.core.MatOfDMatch;
import org.opencv.core.MatOfKeyPoint;
import org.opencv.core.Scalar;
import org.opencv.features2d.DescriptorExtractor;
import org.opencv.features2d.DescriptorMatcher;
import org.opencv.features2d.FeatureDetector;
import org.opencv.features2d.Features2d;
import org.opencv.highgui.Highgui;

import java.io.File;


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    void OnCall(View view)
    {
        String filename = "try.png";
        Log.i("Message", "First point");

        File root = Environment.getExternalStorageDirectory();
        File file = new File(root, filename);

        //Current problem point : emulator dont work well with it & Imread need a path.


    }


    void func()
    {
        String firstFileName = "",secondFileName = "";

        //read the images.
        /*PROBLEM : emulator is doing problems with this..*/
        Mat img1 = Highgui.imread(firstFileName, Highgui.IMREAD_GRAYSCALE);
        Mat img2 = Highgui.imread(secondFileName, Highgui.IMREAD_GRAYSCALE);

        MatOfKeyPoint kp1 = new MatOfKeyPoint();
        MatOfKeyPoint kp2 = new MatOfKeyPoint();

        Mat des1 = new Mat();
        Mat des2 = new Mat();

        FeatureDetector detector = FeatureDetector.create(FeatureDetector.ORB);
        DescriptorExtractor extractor = DescriptorExtractor.create(DescriptorExtractor.ORB);

        //Find keypoints
        detector.detect(img1, kp1);
        detector.detect(img2, kp2);

        //Find descriptors
        extractor.compute(img1, kp1, des1);
        extractor.compute(img2, kp1, des2);

        //Def. of the descriptor matcher
        DescriptorMatcher matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);

        //Match between the two images
        MatOfDMatch matches = new MatOfDMatch();
        matcher.match(des1, des2, matches);

        //Understanding problem : read about it more.

        //the results in matches ?

        Mat outputImg = new Mat();
        MatOfByte drawnMatches = new MatOfByte();

        Features2d.drawMatches(img1, kp1, img2, kp2, matches, outputImg, new Scalar(255,0,0), new Scalar(0,0,255), drawnMatches, Features2d.NOT_DRAW_SINGLE_POINTS);

        Bitmap imageMatched = Bitmap.createBitmap(outputImg.cols(), outputImg.rows(), Bitmap.Config.RGB_565);
        Utils.matToBitmap(outputImg, imageMatched);

        //Search what the last lines doing.
    }

}