image_transport::ImageTransport::ImageTransport(ros::NodeHandle const&)’未定義的引用#include <ros/ros.h>#include <image_transport/image_transport.h>#include <opencv2/highgui/highgui.hpp>#include <cv_bridge/cv_bridge.h>int main(int argc, char** argv){ros::init(argc, argv, "image_publisher");ros::NodeHandle nh;image_transport::ImageTransport it(nh);image_transport::Publisher pub = it.advertise("camera/image", 1);cv::Mat image = cv::imread(argv[1], CV_LOAD_IMAGE_COLOR);sensor_msgs::ImagePtr msg = cv_bridge::CvImage(std_msgs::Header(), "bgr8", image).toImageMsg();ros::Rate loop_rate(5);while (nh.ok()) {pub.publish(msg);ros::spinOnce();loop_rate.sleep();}}