Question

我尝试在Android的预览的当前帧上进行一些ImageProcessing。对于其他所有智能手机，它的效果非常好。但是现在，我必须为Nexus 5x提供应用程序。

我从预览中获得了180度旋转的图像。我该如何解决这个问题？这是我设置相机和预览的代码：

private void resetCamera(int width, int height){
    Log.d(TAG, "Reset Camera!");
    CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    try {
        for (String cameraId : cameraManager.getCameraIdList()) {
            CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId);
            mSensorOrientation = cameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
            if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT) {
                continue;
            }
            StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);

            mImageReader = ImageReader.newInstance(width,
                    height,
                    ImageFormat.YUV_420_888,
                    10);
            mImageReader.setOnImageAvailableListener(mOnImageAvailableTrack,
                    mBackgroundHandler);

            mPreviewSize = getPreferredPreviewSize(map.getOutputSizes(SurfaceTexture.class), width, height);
            mCameraId = cameraId;
            return;
        }
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

预览：

private void createTrackingPreviewSession(){
    try{
        SurfaceTexture surfaceTexture = mTextureView.getSurfaceTexture();
        surfaceTexture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
        Surface previewSurface = new Surface(surfaceTexture);
        mPreviewCaptureBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        mPreviewCaptureBuilder.addTarget(previewSurface);
        mPreviewCaptureBuilder.addTarget(mImageReader.getSurface());

        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        mPreviewCaptureBuilder.set(CaptureRequest.JPEG_ORIENTATION,
                getOrientation(rotation));

        mCameraDevice.createCaptureSession(Arrays.asList(previewSurface, mImageReader.getSurface()),
                new CameraCaptureSession.StateCallback(){
                    @Override
                    public void onConfigured(CameraCaptureSession session) {
                        if(mCameraDevice == null){
                            return;
                        }
                        try{
                        Toast.makeText(getApplicationContext(), "Create Tracking Session", Toast.LENGTH_SHORT).show();
                            mPreviewCapture = mPreviewCaptureBuilder.build();
                            mCaptureSession = session;
                            mCaptureSession.setRepeatingRequest(
                                    mPreviewCapture,
                                    mSessionCaptureCallback,
                                    mBackgroundHandler
                            );
                        } catch(CameraAccessException e){
                            e.printStackTrace();
                        }
                    }

                    @Override
                    public void onConfigureFailed(CameraCaptureSession session) {
                        Toast.makeText(
                                getApplicationContext(),
                                "create Camera session failed!",
                                Toast.LENGTH_SHORT
                        ).show();
                    }
                }, null);
    } catch(CameraAccessException e){
        e.printStackTrace();
    }
}

正如您所看到的，我尝试使用该修复程序捕获图像，但它仍无法帮助我从预览中获得转动的图像。

如果有可能，我想要一个解决方案，试图更改相机的设置。我通过绑定的ImageReader获取图像后，我不想自己转动图像。

预览中的Nexus 5x帧将变为Camera2

0 个答案: