画十字光标----openCV

private Mat getCross() {
Mat cross = new Mat(matSize, matSize, CvType.CV_8U, new Scalar(255));
Core.line(cross, new Point(20, matSize / 2), new Point(matSize - 21, matSize / 2), new Scalar(100), 2);
Core.line(cross, new Point(matSize / 2, 20), new Point(matSize / 2, matSize - 21), new Scalar(100), 2);

return cross;
}