c++ opencv ximgproc.hpp 调试的时候系统提示找不到指定文件

vs2019里面使用ximgproc.hpp的thinning函数提示找不到指定文件但是以来包里明明可以找到这个头文件，编写代码的时候也没有提示错误，就是没有颜色。
然后opencv_contrib包之前也下载编译了呀

#include<opencv2/opencv.hpp>
#include<opencv2/ximgproc.hpp>
#include<iostream>

using namespace cv;
using namespace std;

int main() {
    Mat img = imread("LearnCV_black.png", IMREAD_ANYCOLOR);
    if (img.empty()) {
        cout << "请输入正确的图像名称" << endl;
        return -1;
    }
    Mat words = Mat::zeros(100, 200, CV_8UC1);
    putText(words, "Learn", Point(30, 30), 2, 1, Scalar(255), 2);
    putText(words, "OpenCV 4", Point(30, 60), 2, 1, Scalar(255), 2);
    circle(words, Point(80, 75), 10, Scalar(255), -1);
    circle(words, Point(130, 75), 10, Scalar(255), 3);
    Mat thin1, thin2;
    ximgproc::thinning(img, thin1, ximgproc::THINNING_ZHANGSUEN);
    ximgproc::thinning(words, thin2, ximgproc::THINNING_ZHANGSUEN);
    imshow("thin1", thin1);
    imshow("img", img);
    namedWindow("thin2", WINDOW_NORMAL);
    imshow("thin2", thin2);
    namedWindow("words", WINDOW_NORMAL);
    imshow("words", words);
    waitKey(0);
    return 0;
}

这段代码的作用就是将图片中的文字进行细化操作

题主怎么解决的

错误2