问题解决的关键在于使用Android NDK中的本地方法，以C/C++代码编写来处理图像，同时还需要使用Android系统控件来获取相机预览图像。以下是具体的和代码示例：

1.创建一个Android Studio项目，然后在项目中添加一个jni文件夹，并在其中创建一个名为“native-lib.cpp”的C++文件。

2.在“build.gradle(Module:app)”文件中添加以下代码：

externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}

3.在“build.gradle(Module:app)”文件中添加以下代码，用于导入OpenCV库:

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'org.opencv:opencv-android:3.1.0'
}

4.在“CMakeLists.txt”文件中添加以下代码：

cmake_minimum_required(VERSION 3.4.1)

add_library(native-lib SHARED native-lib.cpp)

find_library(log-lib log)

target_link_libraries(native-lib ${log-lib} -ljnigraphics -lopencv_android_core -lopencv_java3)

5.在“MainActivity.java”文件中添加以下代码：

public class MainActivity extends AppCompatActivity {

static {
System.loadLibrary("native-lib");
}

private Camera mCamera;
private CameraPreview mPreview;
private FrameLayout mLayout;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mLayout = findViewById(R.id.camera_preview);
mPreview = new CameraPreview(this, mCamera);
mLayout.addView(mPreview);

Button captureButton = findViewById(R.id.button_capture);
captureButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
captureImage();
}
});

}

private void captureImage() {
mCamera.takePicture(null, null, new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
modifyImage(bitmap);
}
});
}

private void modifyImage(Bitmap bitmap) {
Bitmap modifiedBitmap = doSomethingWithBitmap(bitmap);
ImageView imageView = findViewById(R.id.image_view);
imageView.setImageBitmap(modifiedBitmap);
}

public static native void doSomethingWithImage(long matAddress);

}

6.在“CameraPreview.java”文件中添加以下代码：

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {

private SurfaceHolder mHolder;
private Camera mCamera;

public CameraPreview(Context context, Camera camera) {
super(context);
mCamera = camera;

mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
Log.d("CameraPreview", "Error setting camera preview: " + e.getMessage());
}
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (mHolder.getSurface() == null) {
return;
}

try {
mCamera.stopPreview();
} catch (Exception e) {

}

try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d("CameraPreview", "Error starting camera preview: " + e.getMessage());
}
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
try {
mCamera.stopPreview();
mCamera.release();
} catch (Exception e) {

}
}
}

7.在“native-lib.cpp”文件中添加以下代码：