我想通过计算从相机传入的两帧之间的差异来检测运动,并将这种差异显示在手机屏幕上。我必须重写OnCameraFrame()
方法所以我做了:
@Override
public Mat onCameraFrame(Mat inputFrame) {
inputFrame.copyTo(current);
Core.absdiff(current, previous, difference);
current.copyTo(previous);
return difference;
}
但不幸的是,应用程序崩溃了,我得到:
06-13 18:17:30.000: E/cv::error()(13097): OpenCV Error: Sizes of input arguments do not match (The operation is neither 'array op array' (where arrays have the same size and the same number of channels), nor 'array op scalar', nor 'scalar op array') in void cv::arithm_op(cv::InputArray, cv::InputArray, cv::OutputArray, cv::InputArray, int, void (**)(const uchar*, size_t, const uchar*, size_t, uchar*, size_t, cv::Size, void*), bool, void*), file /home/reports/ci/slave/50-SDK/opencv/modules/core/src/arithm.cpp, line 1277
06-13 18:17:30.005: W/dalvikvm(13097): threadid=11: thread exiting with uncaught exception (group=0x411df2a0)
06-13 18:17:30.005: E/AndroidRuntime(13097): FATAL EXCEPTION: Thread-983
06-13 18:17:30.005: E/AndroidRuntime(13097): CvException [org.opencv.core.CvException: /home/reports/ci/slave/50-SDK/opencv/modules/core/src/arithm.cpp:1277: error: (-209) The operation is neither 'array op array' (where arrays have the same size and the same number of channels), nor 'array op scalar', nor 'scalar op array' in function void cv::arithm_op(cv::InputArray, cv::InputArray, cv::OutputArray, cv::InputArray, int, void (**)(const uchar*, size_t, const uchar*, size_t, uchar*, size_t, cv::Size, void*), bool, void*)
完整的类代码是:
package com.example.szpieg2;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener;
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.Range;
import org.opencv.core.Size;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.Window;
import android.view.WindowManager;
public class TrackActivity extends Activity implements CvCameraViewListener {
private Mat current;
private CameraBridgeViewBase cameraView;
private Mat previous;
private Mat difference;//difference between previous and current
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
Log.i("Co sie dzieje?", "OpenCV loaded successfully");
cameraView.enableView();
// cameraView.setOnTouchListener(ColorBlobDetectionActivity.this);
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setContentView(R.layout.activity_track);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
cameraView = (CameraBridgeViewBase) findViewById(R.id.surface_view);
cameraView.setCvCameraViewListener(this);
}
// --------Activity Actions---------
@Override
public void onPause() {
if (cameraView != null)
cameraView.disableView();
super.onPause();
}
@Override
public void onResume() {
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this,
mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (cameraView != null)
cameraView.disableView();
}
// --------/Activity Actions/---------
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_track, menu);
return true;
}
// --------listener method implementation-------------
@Override
public void onCameraViewStarted(int width, int height) {
previous = new Mat(width, height, CvType.CV_64FC4);
current = new Mat(width, height, CvType.CV_64FC4);
difference = new Mat(width, height, CvType.CV_64FC4);
}
@Override
public void onCameraViewStopped() {
current.release();
}
@Override
public Mat onCameraFrame(Mat inputFrame) {
inputFrame.copyTo(current);
Core.absdiff(current, previous, difference);
current.copyTo(previous);
return difference;
}
}
编辑
我已经在使用 openCV 管理器的设备上安装了 openCV。添加到 OpenCV 的所有教程都在该设备上运行。该设备是三星 Galaxy Note 2。图书馆项目正在使用的是OpenCV 2.4.3
,这个必须留下。
[/编辑]