Opencv map reading test -- error resolution

01. The test program ：

#include<iostream>
#include<pcl/io/pcd_io.h>
#include<pcl/point_types.h>
#include <pcl/visualization/cloud_viewer.h>

int main(int argc, char** argv)

{
    pcl::PointCloud<pcl::PointXYZ>::Ptr cloud(new pcl::PointCloud<pcl::PointXYZ>);
    //* Open the point cloud file 
    if (pcl::io::loadPCDFile<pcl::PointXYZ>("rabbit.pcd", *cloud) == -1) {
        PCL_ERROR("Couldn't read file rabbit.pcd\n");
        return(-1);
    }
    std::cout << cloud->points.size() << std::endl;
    pcl::visualization::CloudViewer viewer("cloud viewer");
    viewer.showCloud(cloud);
    while (!viewer.wasStopped())

{

    }
    system("pause");
    return 0;
}

02. Solve the problem of reading pictures ：OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow_FunORAMA The blog of -CSDN Blog My is opencv4.1.1+ Community Edition vs2017 resolvent ：1.xxxxd.lib It's useful to put it in the front and test it personally ！ I got it right several times before , Later, it took a long time to know this problem .2. The picture should be placed in main.cpp Under the file directory of 3. stay imread Use absolute path , And pay attention to modifying the file path. The file path may need other ways , But it's better to use this .srcImage2 = imread("E:\\Code\\C...https://blog.csdn.net/FunORAMA/article/details/99100784?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164466055116780261922565%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=164466055116780261922565&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-99100784.first_rank_v2_pc_rank_v29&utm_term=+Assertion+failed+%28size.width%3E0+%26%26+size.height%3E0%29&spm=1018.2226.3001.4187