JavaOpenCV图像处理之背景切换

package com.xu.OpenCV;

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Scalar;
import org.opencv.highgui.HighGui;
import org.opencv.imGCodecs.Imgcodecs;


public class Image {

    static {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    }

    public static void main(String[] args) {
        ROI();
    }

    public static void ROI() {
        Mat src = Imgcodecs.imread("D:\\OneDrive\\桌面\\1.png", Imgcodecs.IMREAD_ANYCOLOR);
        // 获取 mask
        Mat mask = new Mat();
        Core.inRange(src, new Scalar(235, 235, 235), new Scalar(255, 255, 255), mask);// B, G, R
        // 获取原图中的ROI
        Mat dst = new Mat();
        Core.bitwise_not(mask, mask);
        Core.bitwise_and(src, src, dst, mask);
        // 获取 新背景的 mask
        Mat img = new Mat();
        Core.bitwise_not(mask, mask);
        Mat blue = new Mat(src.size(), src.type(), new Scalar(255, 0, 0));
        Core.bitwise_or(dst, blue, img, mask);
        // 背景和ROI融合
        Mat mat = new Mat();
        Core.add(img, dst, mat);
        HighGui.imshow("新背景", mat);
        HighGui.waiTKEy();
        HighGui.destroyAllwindows();
    }

}