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我对 Android 编程和 OpenCV 还是很陌生。我采用了随软件包一起提供的 OpenCV 示例之一（教程 2 - 混合处理）并尝试修改一些图像转换，但尽管我的更改很小，但在我编译并在我的 Galaxy Note 上安装更改后的示例（4.1 .2) 程序不会运行。打开应用程序后，屏幕变黑，片刻后，我收到应用程序已停止的消息。

请注意，当我编译和安装未更改的示例时，应用程序运行没有任何问题。

我将完整的包上传到我的网站 http://cheaib.de/Tutorial2Activity.rar

这是代码

package org.opencv.samples.tutorial2;

import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.imgproc.Imgproc;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;

public class Tutorial2Activity extends Activity implements CvCameraViewListener2 {
private static final String    TAG = "OCVSample::Activity";

private static final int       VIEW_MODE_THRES1     = 0;
private static final int       VIEW_MODE_GRAY     = 1;
private static final int       VIEW_MODE_CANNY    = 2;
private static final int       VIEW_MODE_CANNY2 = 5;

private int                    mViewMode;
private Mat                    mRgba;
private Mat                    mIntermediateMat;
private Mat                    mGray;
private Mat                    mTemp1;

private MenuItem               mItemPreviewThres1;
private MenuItem               mItemPreviewGray;
private MenuItem               mItemPreviewCanny;
private MenuItem               mItemPreviewCanny2;

private CameraBridgeViewBase   mOpenCvCameraView;

private BaseLoaderCallback  mLoaderCallback = new BaseLoaderCallback(this) {
    @Override
    public void onManagerConnected(int status) {
        switch (status) {
            case LoaderCallbackInterface.SUCCESS:
            {
                Log.i(TAG, "OpenCV loaded successfully");

                // Load native library after(!) OpenCV initialization
                System.loadLibrary("mixed_sample");

                mOpenCvCameraView.enableView();
            } break;
            default:
            {
                super.onManagerConnected(status);
            } break;
        }
    }
};

public Tutorial2Activity() {
    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.tutorial2_surface_view);

    mOpenCvCameraView = (CameraBridgeViewBase) findViewById    (R.id.tutorial2_activity_surface_view);
    mOpenCvCameraView.setCvCameraViewListener(this);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    Log.i(TAG, "called onCreateOptionsMenu");
    mItemPreviewThres1 = menu.add("Preview Thres1");
    mItemPreviewGray = menu.add("Preview Gray");
    mItemPreviewCanny = menu.add("Preview Canny");
    mItemPreviewCanny2 = menu.add("Preview Canny2");
    return true;
}

@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) {
    mRgba = new Mat(height, width, CvType.CV_8UC4);
    mIntermediateMat = new Mat(height, width, CvType.CV_8UC4);
    mGray = new Mat(height, width, CvType.CV_8UC1);
    mTemp1 = new Mat(height, width, CvType.CV_8UC1);
}

public void onCameraViewStopped() {
    mRgba.release();
    mGray.release();
    mIntermediateMat.release();
    mTemp1.release();
}

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    final int viewMode = mViewMode;
    switch (viewMode) {
    case VIEW_MODE_GRAY:
        // input frame has gray scale format
        Imgproc.cvtColor(inputFrame.gray(), mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
        break;
    case VIEW_MODE_THRES1:
        // input frame has gray scale format
        Imgproc.threshold(inputFrame.gray(), mTemp1, 150, 255, 0);
        Imgproc.cvtColor(mTemp1, mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
        break;
    case VIEW_MODE_CANNY:
        // input frame has gray scale format
        mRgba = inputFrame.rgba();
        Imgproc.Canny(inputFrame.gray(), mIntermediateMat, 80, 100);
        Imgproc.cvtColor(mIntermediateMat, mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
        break;
    case VIEW_MODE_CANNY2:
        // input frame has gray scale format
        Imgproc.threshold(inputFrame.gray(), mTemp1, 150, 255, 0);
        mRgba = inputFrame.rgba();
        Imgproc.Canny(mTemp1, mIntermediateMat, 80, 100);
        Imgproc.cvtColor(mTemp1, mRgba, Imgproc.COLOR_GRAY2RGBA, 4);
        break;
    }

    return mRgba;
}

public boolean onOptionsItemSelected(MenuItem item) {
    Log.i(TAG, "called onOptionsItemSelected; selected item: " + item);

    if (item == mItemPreviewThres1) {
        mViewMode = VIEW_MODE_THRES1;
    } else if (item == mItemPreviewGray) {
        mViewMode = VIEW_MODE_GRAY;
    } else if (item == mItemPreviewCanny) {
        mViewMode = VIEW_MODE_CANNY;
    } else if (item == mItemPreviewCanny2) {
        mViewMode = VIEW_MODE_CANNY2;
    }

    return true;
}

//public native void FindFeatures(long matAddrGr, long matAddrRgba);
}

我希望你能帮助我找出应用程序崩溃的原因。Eclipse 没有给我任何错误。

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1 回答 1

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您是否使用 NDK 编译过 C++ 文件？混合处理和人脸检测需要先编译 JNI 中的 C++ 文件。

于 2013-05-18T17:16:04.277 回答