Thread: image segmentation on android

I am trying run this code that I found on the internet:

package com.opencv.grabcut.android;

import java.io.IOException;

import org.opencv.android.Utils;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
import android.widget.Toast;


public class Grabcut extends Activity implements OnTouchListener {
ImageView imageView;
Bitmap bitmap;
Canvas canvas;
Scalar color = new Scalar(255, 0, 0, 255);
Point tl, br;
int counter;
Bitmap bitmapResult, bitmapBackground;
Mat dst = new Mat();
final String pathToImage = "/mnt/sdcard/gcut.png";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grabcut_main);
imageView = (ImageView) this.findViewById(R.id.imageView);

bitmap = BitmapFactory.decodeFile(pathToImage);
Toast msg = Toast.makeText(Grabcut.this, "Press top left and bottom right of the foreground image", Toast.LENGTH_LONG);

msg.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);

msg.show();
bitmapResult = bitmap.copy(bitmap.getConfig(), true);
canvas = new Canvas(bitmapResult);

imageView.setImageBitmap(bitmapResult);
imageView.setOnTouchListener(this);

tl = new Point();
br = new Point();
counter = 0;
}

//@Override
public boolean onTouch(View v, MotionEvent event) {

if (event.getAction() == MotionEvent.ACTION_DOWN) {
if (counter == 0) {
tl.x = event.getX();
tl.y = event.getY();
counter++;
} else if (counter == 1) {
br.x = event.getX();
br.y = event.getY();
counter++;

Mat img = new Mat();
img = Highgui.imread(pathToImage);
Mat background = new Mat();
try {
background = Utils.loadResource(getApplicationContext(),
R.drawable.wall);
} catch (IOException e) {

e.printStackTrace();
}

backgroundSubtracting(img, background);
Highgui.imwrite("/mnt/sdcard/GRABCUT/rect.png", dst);
Bitmap jpg = BitmapFactory
.decodeFile("/mnt/sdcard/GRABCUT/rect.png");

imageView.setScaleType(ImageView.ScaleType.CENTER_ INSIDE);
imageView.setAdjustViewBounds(true);
imageView.setPadding(2, 2, 2, 2);
imageView.setImageBitmap(jpg);
imageView.invalidate();
}
}

return true;
}

private void backgroundSubtracting(Mat img, Mat background) {
Mat firstMask = new Mat();
Mat bgModel = new Mat();
Mat fgModel = new Mat();
Mat mask;
Mat source = new Mat(1, 1, CvType.CV_8U, new Scalar(3.0));
dst = new Mat();
Rect rect = new Rect(tl, br);

Imgproc.grabCut(img, firstMask, rect, bgModel, fgModel, 1, 0 /* GC_INIT_WITH_RECT */);
Core.compare(firstMask, source/* GC_PR_FGD */, firstMask, Core.CMP_EQ);

Mat foreground = new Mat(img.size(), CvType.CV_8UC3, new Scalar(255,
255, 255));
img.copyTo(foreground, firstMask);

Core.rectangle(img, tl, br, color);

Mat tmp = new Mat();
Imgproc.resize(background, tmp, img.size());
background = tmp;
mask = new Mat(foreground.size(), CvType.CV_8UC1, new Scalar(255, 255, 255));

Imgproc.cvtColor(foreground, mask, 6/* COLOR_BGR2GRAY */);
Imgproc.threshold(mask, mask, 254, 255, 1 /* THRESH_BINARY_INV */);

Mat vals = new Mat(1, 1, CvType.CV_8UC3, new Scalar(0.0));
background.copyTo(dst);

background.setTo(vals, mask);

Core.add(background, foreground, dst, mask);

firstMask.release();
source.release();
bgModel.release();
fgModel.release();
vals.release();
}

}


I've manage to fix some errors of this program, but there is still one error that I can't fix:

the error is "wall cannot be resolved or is not a field"

The error always points on R.drawable.wall inside the the public boolean onTouch()

please help how can i fix this error...

thanks