用c++编写opencv的程序遇到问题，请各位大佬帮助
#include <opencv2/opencv.hpp>#include <iostream>
#include <math.h>
using namespace cv;
int main() {
Mat src, dst;
src = imread("C:/Users/Administrator/Desktop/3.jpg");
if (!src.data) {
printf("没有图片！");
return -1;
}
namedWindow("input image", CV_WINDOW_AUTOSIZE);
imshow("input image", src);
/*
int cols = (src.cols - 1)*src.channels();
int offsetx = src.channels();
int rows = src.rows;
dst = Mat::zeros(src.size(), src.type());
for (int row = 1; row < rows; row++) {
const uchar* previous = src.ptr<uchar>(row - 1);
const uchar* current = src.ptr<uchar>(row);
const uchar* next = src.ptr<uchar>(row + 1);
uchar*output = dst.ptr<uchar>(row);
for (int col = 1; col < offsetx; col++) {
output = saturate_cast<uchar>(5 * current - (current + current + previous + next));
}
}
*/
Mat kernel = (Mat_<char>(3, 3) << 0, -1, 0, -1, 5, 0, -1, 0);
filter2D(src, dst, src.depth(), kernel);
namedWindow("change image output", CV_WINDOW_AUTOSIZE);
imshow("change image output", dst);
waitKey(0);
return 0;
}
错误提示：OpenCV(3.4.2) Error: Assertion failed (this->it == ((const Mat_<_Tp>*)this->it.m)->end()) in cv::MatCommaInitializer_<ch
ar>::operator class cv::Mat_<char>, file g:\chengxu\opencv\opencv\build\include\opencv2\core\mat.inl.hpp, line 3299
OpenCV: terminate handler is called! The last OpenCV error is:
OpenCV(3.4.2) Error: Assertion failed (this->it == ((const Mat_<_Tp>*)this->it.m)->end()) in cv::MatCommaInitializer_<ch
ar>::operator class cv::Mat_<char>, file g:\chengxu\opencv\opencv\build\include\opencv2\core\mat.inl.hpp, line 3299
菜鸡一个，求大佬解答
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