如何在Android的OpenCV中在Touch上的框架上绘制多个矩形？

首先，我在Eclipse上做这个。

我希望在接收Touch事件时绘制一个矩形。 那个矩形应该是持久的，另一个Touchevent应该绘制另一个矩形。 3.我已经设法让它在一个TouchEvent中持久化，然后根据坐标移动。 因为不同的触摸事件，我基本上应该有多个矩形。

我正在考虑迭代数组…但我仍然感到困惑请帮忙！ 这个不起作用……我要求改进……谢谢！ 还有清单和东西是正确的，权限是正确的！ 代码有点像：

package code.e14.balldetector; 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.Core; import org.opencv.core.CvType; import org.opencv.core.Mat; import org.opencv.core.Point; import org.opencv.core.Scalar; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MotionEvent; import android.view.SurfaceView; import android.view.View; import android.view.View.OnTouchListener; import android.view.WindowManager; public class MainActivity extends Activity implements CvCameraViewListener2, OnTouchListener { private static final String TAG = "OCVBallTracker"; private CameraBridgeViewBase mOpenCvCameraView; private boolean mIsJavaCamera = true; private Mat mRgba; int i=0; private Double[] h=new Double[20]; private Double[] k=new Double[20]; private double x=0; private double y=0; 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(); mOpenCvCameraView.setOnTouchListener(MainActivity.this); } break; default: { super.onManagerConnected(status); } break; } } }; public MainActivity() { Log.i(TAG, "Instantiated new " + this.getClass()); } /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { Log.i(TAG, "called onCreate"); super.onCreate(savedInstanceState); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(R.layout.activity_main); if (mIsJavaCamera) mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.java_surface_view); else mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.native_surface_view); 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_5, this, mLoaderCallback); } public void onDestroy() { super.onDestroy(); if (mOpenCvCameraView != null) mOpenCvCameraView.disableView(); } @Override public boolean onCreateOptionsMenu(Menu menu) { Log.i(TAG, "called onCreateOptionsMenu"); return true; } public void onCameraViewStarted(int width, int height) { mRgba = new Mat(height, width, CvType.CV_8UC4); } public void onCameraViewStopped() { mRgba.release(); } @Override public boolean onTouch(View arg0,MotionEvent event) { double cols = mRgba.cols(); double rows = mRgba.rows(); double xOffset = (mOpenCvCameraView.getWidth() - cols) / 2; double yOffset = (mOpenCvCameraView.getHeight() - rows) / 2; h[i] = (double)(event).getX() - xOffset; k[i] = (double)(event).getY() - yOffset; h[i]=x; k[i]=y; Log.i(TAG, "Touch image coordinates: (" + h[i] + ", " + k[i] + ")"); i++; return false;// don't need subsequent touch events } public Mat onCameraFrame(CvCameraViewFrame inputFrame) { mRgba=inputFrame.rgba(); Core.rectangle(mRgba, new Point(x-100,y-100),new Point(x+100,y+100),new Scalar( 0, 0, 255 ),0,8, 0 ); return mRgba; } 

}

Answer 1

将矩形存储在List中非常容易。 我做了一些应该有效的小调整。

 private List ListOfRect = new ArrayList(); @Override public boolean onTouch(View arg0,MotionEvent event) { double cols = mRgba.cols(); double rows = mRgba.rows(); double xOffset = (mOpenCvCameraView.getWidth() - cols) / 2; double yOffset = (mOpenCvCameraView.getHeight() - rows) / 2; h[i] = (double)(event).getX() - xOffset; k[i] = (double)(event).getY() - yOffset; h[i]=x; k[i]=y; ListOfRect.add(new Rect(x-100, y-100, x+100, y+100)); Log.i(TAG, "Touch image coordinates: (" + h[i] + ", " + k[i] + ")"); i++; return false;// don't need subsequent touch events } public Mat onCameraFrame(CvCameraViewFrame inputFrame) { mRgba=inputFrame.rgba(); for(int i=0; i 

但请记住，当您不再需要矩形时，需要释放并清除列表以释放内存。 我希望它有所帮助。