OpenCV 相机方向问题 [英] OpenCV camera orientation issue

问题描述

我有一个简单的项目，它只显示带有 org.opencv.android.JavaCameraView 的相机.

I have a simple project that just show the camera with org.opencv.android.JavaCameraView.

我的问题是，默认情况下，相机处于横向模式，我无法更改这一点，因为我需要定义 CameraBridgeViewBase 而不是常规相机意图.

my problem is that in default the camera is on landscape mode and I can't change this cause I need to define CameraBridgeViewBase instead of a regular camera intent.

这是我代码的一部分:

XML 代码:

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <org.opencv.android.JavaCameraView
                android:layout_width="fill_parent"
                android:layout_height="300dp"
                android:visibility="gone"
                android:id="@+id/HelloOpenCvView"
                opencv:show_fps="true"
                opencv:camera_id="1" />


        </LinearLayout>  

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content" >


            <Button
                android:id="@+id/BtnVideo"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="2dp"                    
                android:layout_width="0dp"
                style="@style/button"
                android:layout_height="wrap_content"
                android:layout_weight="1.00"
                android:text="@string/videoBtn"
                android:textSize="18dip" />


        </LinearLayout>   

Java 代码:

 CameraBridgeViewBase mOpenCvCameraView;
    Button VideoButton;
 protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        overridePendingTransition(0, 0);

        VideoButton = (Button) this.findViewById(R.id.BtnVideo);

        VideoButton.setOnClickListener(onClickListener);

        mOpenCvCameraView= (CameraBridgeViewBase) findViewById(R.id.HelloOpenCvView);
        mOpenCvCameraView.setVisibility(SurfaceView.INVISIBLE);

    } 

        private OnClickListener onClickListener = new OnClickListener() {

            @Override
            public void onClick(View v) {
                    switch (v.getId()){

                        case R.id.BtnVideo:
                            if(mOpenCvCameraView.getVisibility() == SurfaceView.VISIBLE)
                            {
                                mOpenCvCameraView.setVisibility(SurfaceView.INVISIBLE);
                            }
                            else
                            {
                                mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
                            }

                            break;
                        default :
                            break;
                    }

            }
        };


        public void onResume() {
            super.onResume();
            overridePendingTransition(0, 0);
            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback);
        }
         public void onPause()
         {
             super.onPause();
             if (mOpenCvCameraView != null)
                 mOpenCvCameraView.disableView();
         }
         public void onDestroy() {
             super.onDestroy();
             if (mOpenCvCameraView != null)
                 mOpenCvCameraView.disableView();
         }
         public void onCameraViewStarted(int width, int height) {
         }

         public void onCameraViewStopped() {
         }
         public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
             return inputFrame.rgba();
         }

        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;
                }
            }
        };

那么如何更改默认方向?

So how can I change the default orientation?

谢谢！

推荐答案

好的，我发现这是一个解决方案:

Ok, I found this as a solution:

首先我进入 OpenCV 库 - 2.4.5

然后在 mCamera.startPreview(); 之前的 initializeCamera() 函数中，我添加了这两个函数:

and then in initializeCamera() function before mCamera.startPreview(); I added these 2 function:

            setDisplayOrientation(mCamera, 90);
            mCamera.setPreviewDisplay(getHolder());

第一个函数是这样实现的:

and the first function implemented like this:

protected void setDisplayOrientation(Camera camera, int angle){
    Method downPolymorphic;
    try
    {
        downPolymorphic = camera.getClass().getMethod("setDisplayOrientation", new Class[] { int.class });
        if (downPolymorphic != null)
            downPolymorphic.invoke(camera, new Object[] { angle });
    }
    catch (Exception e1)
    {
        e1.printStackTrace();
    }
}

我只是提醒我使用 OpenCV.

I just reminding that I work with OpenCV.

希望这对某人有所帮助.

Hope this help someone.

这篇关于OpenCV 相机方向问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！