OpenCV相同的坐标不同的点？ [关闭]

Question

我正在尝试从红色圆圈内部获取颜色并更改位于左上角的大圆圈的颜色，如 screen shot 所示。并且从屏幕截图中可以看出，大圆圈的颜色与红色圆圈中的颜色不一样，它的颜色从红色圆圈稍微偏左一点。我给出了相同的坐标，如何解决？

这是我的代码。

public class MainActivity extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2, View.OnTouchListener {

    private CameraBridgeViewBase cameraManager;

    private BaseLoaderCallback callBack = new BaseLoaderCallback(this) {
        @Override
        public void onManagerConnected(int status) {
            cameraManager.enableView();
        }
    };

    Mat mRgba;
    double[] renk;
    int r,g,b;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if(!OpenCVLoader.initDebug()){
            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_2_0, this, callBack);
        }

        cameraManager = (CameraBridgeViewBase)findViewById(R.id.kamera);
        cameraManager.setVisibility(View.VISIBLE);
        cameraManager.setCvCameraViewListener(this);
        cameraManager.setCameraIndex(0);
    }

    @Override
    public void onCameraViewStarted(int width, int height) {
        mRgba = new Mat(width, height, CvType.CV_8UC4);
    }

    @Override
    public void onCameraViewStopped() {

    }

    @Override
    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
        mRgba = inputFrame.rgba();

        renk = mRgba.get(mRgba.width()/2, (mRgba.height()/10)*8);
        Imgproc.circle(mRgba, new Point(mRgba.width()/2, (mRgba.height()/10)*8), 10, new Scalar(255,0,0));

        r = (int) renk[0];
        g = (int) renk[1];
        b = (int) renk[2];

        Imgproc.circle(mRgba, new Point(0, 0), 100, new Scalar(r,g,b), 100);

        return mRgba;

    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return false;
    }
}

Answer 1

（代表 OP 发布）。

我想到了那件事。 Point(x,y) = 列、行。