package org.opencv.samples.tutorial1;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.*;
//import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import com.example.imgloader.R;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class Tutorial1Activity extends Activity implements CvCameraViewListener2 {
private static final String TAG = "OCVSample::Activity";
private Mat mRgba;
private Mat mGray;
private CameraBridgeViewBase mOpenCvCameraView;
Scalar min = new Scalar(0, 30, 60, 0);
Scalar max = new Scalar(20, 150, 255, 0);
Mat pointMatHsv;
Mat heirarchy;
Mat overlay;
private static double mMinContourArea = 0.1;
Mat hullMat;
Scalar CONTOUR_COLOR = new Scalar(255, 0, 0, 255);
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
public Tutorial1Activity() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.tutorial1_surface_view);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial1_activity_java_surface_view);
mOpenCvCameraView.setMaxFrameSize(720, 480);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
}
@Override
public void onPause() {
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onResume() {
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public void onCameraViewStarted(int width, int height) {
mGray = new Mat();
mRgba = new Mat();
pointMatHsv = new Mat(1, 1, CvType.CV_8UC3);
heirarchy = new Mat();
overlay = new Mat(1,1, CvType.CV_8UC3);
}
public void onCameraViewStopped() {
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
mRgba = inputFrame.rgba();
mRgba.copyTo(pointMatHsv);
Scalar CONTOUR_COLOR = new Scalar(255, 0, 0, 255);
Imgproc.cvtColor(pointMatHsv, mGray, Imgproc.COLOR_RGB2HSV);
Core.inRange(mGray, min, max, pointMatHsv);
Imgproc.dilate(pointMatHsv, pointMatHsv, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
//Imgproc.dilate(mRgba, mRgba, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
Imgproc.erode(pointMatHsv, pointMatHsv, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
mGray = retContours(pointMatHsv,mRgba);
return mRgba;
}
public Mat retContours(Mat pointMatHsv, Mat mRgba) {
List contours = new ArrayList();
List mContours = new ArrayList();
Imgproc.findContours(pointMatHsv, contours, heirarchy, Imgproc.RETR_TREE, Imgproc.CHAIN_APPROX_SIMPLE);
double maxArea = 0;
Iterator each = contours.iterator();
while (each.hasNext()) {
MatOfPoint wrapper = each.next();
double area = Imgproc.contourArea(wrapper);
if (area > maxArea)
maxArea = area;
}
// Imgproc.cvtColor(pointMatHsv,pointMatHsv,Imgproc.COLOR_HSV2RGB_FULL);
mContours.clear();
each = contours.iterator();
while (each.hasNext()) {
MatOfPoint contour = each.next();
if (Imgproc.contourArea(contour) > mMinContourArea * maxArea) {
// Core.multiply(contour, new Scalar(4, 4), contour);
mContours.add(contour);
}
}
Imgproc.drawContours(mRgba,mContours,-1,new Scalar(0, 255, 0));
for(int i=0;i hullContours = new ArrayList();
MatOfPoint hullMat = new MatOfPoint();
hullMat.create((int) hull.size().height, 1, CvType.CV_32SC2);
for (int j = 0; j < hull.size().height; j++) {
int index = (int) hull.get(j, 0)[0];
double[] point = new double[]{
currentContour.get(index, 0)[0], currentContour.get(index, 0)[1]
};
hullMat.put(j, 0, point);
}
hullContours.add(hullMat);
Imgproc.drawContours(mRgba, hullContours, 0, new Scalar(0, 0, 255), 2);
}
private void drawBoundingBox(MatOfPoint currentContour) {
Rect rectangle = Imgproc.boundingRect(currentContour);
Imgproc.rectangle(mRgba, rectangle.tl(), rectangle.br(), new Scalar(255,0,0),1);
}
private void drawEnclosingCircle(MatOfPoint currentContour) {
float[] radius = new float[1];
Point center = new Point();
MatOfPoint2f currentContour2f = new MatOfPoint2f();
currentContour.convertTo(currentContour2f, CvType.CV_32FC2);
Imgproc.minEnclosingCircle(currentContour2f, center, radius);
Imgproc.circle(mRgba, center, (int) radius[0], new Scalar(255,0,0));
}
}
and this error is thrown
02-03 19:20:05.338 29021-29113/org.opencv.samples.tutorial1 E/art﹕ No implementation found for void org.opencv.imgproc.Imgproc.rectangle_1(long, double, double, double, double, double, double, double, double, int) (tried Java_org_opencv_imgproc_Imgproc_rectangle_11 and Java_org_opencv_imgproc_Imgproc_rectangle_11__JDDDDDDDDI)
02-03 19:20:05.339 29021-29113/org.opencv.samples.tutorial1 E/AndroidRuntime﹕ FATAL EXCEPTION: Thread-8072
Process: org.opencv.samples.tutorial1, PID: 29021
java.lang.UnsatisfiedLinkError: No implementation found for void org.opencv.imgproc.Imgproc.rectangle_1(long, double, double, double, double, double, double, double, double, int) (tried Java_org_opencv_imgproc_Imgproc_rectangle_11 and Java_org_opencv_imgproc_Imgproc_rectangle_11__JDDDDDDDDI)
at org.opencv.imgproc.Imgproc.rectangle_1(Native Method)
at org.opencv.imgproc.Imgproc.rectangle(Imgproc.java:2779)
at org.opencv.samples.tutorial1.Tutorial1Activity.drawBoundingBox(Tutorial1Activity.java:204)
at org.opencv.samples.tutorial1.Tutorial1Activity.retContours(Tutorial1Activity.java:172)
at org.opencv.samples.tutorial1.Tutorial1Activity.onCameraFrame(Tutorial1Activity.java:137)
at org.opencv.android.CameraBridgeViewBase.deliverAndDrawFrame(CameraBridgeViewBase.java:393)
at org.opencv.android.JavaCameraView$CameraWorker.run(JavaCameraView.java:346)
at java.lang.Thread.run(Thread.java:818)
02-03 19:20:05.359 29021-29021/org.opencv.samples.tutorial1 D/Java
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