Concatenating two vector in OpenCV using C++

Asked Mar 12 '18 at 18:08

Active Mar 12 '18 at 18:16

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How to efficiently concatenate two vectors of cv::String type in OpenCV? I have the following method that uses cv::glob method from openCv to return all filenames from a directory, an the method parameter is a vector of directories names.

vector<String> GetTrainingImageFiles(vector<string> directories)
{
vector<cv::String> allFiles;      //this will hold all the file names
vector<cv::String> directoryFiles;// this will hold a specific directory files for one iteration
for(string directory : directories)
{
    cv::String path(directory + "/*.ppm"); //select only ppm
    vector<cv::Mat> data;
    cv::glob(path, directoryFiles, false);
    //Here the directoryFiles vector should be concatenated to allFiles vector
}
return directoryFiles;
}

Any ideas on this issue?

edited Mar 12 '18 at 18:16

asked Mar 12 '18 at 18:08

sixfeet

Which vectors are you trying to concatenate? – NathanOliver Mar 12 '18 at 18:12
@NathanOliver The directoryFiles to a second vector, I will edit the code to be more specific – sixfeet Mar 12 '18 at 18:14
3

This isn't really an OpenCV question, as much as a general c++ std::vector question. See: https://stackoverflow.com/questions/3177241/what-is-the-best-way-to-concatenate-two-vectors – msmith81886 Mar 12 '18 at 18:14
1

@msmith81886 I think the referenced answer should do the job, thanks! – sixfeet Mar 12 '18 at 18:19

Concatenating two vector in OpenCV using C++

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