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Adding two samples that deal with FileStorage - useful for creating image lists
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@ -14,8 +14,10 @@ using namespace std;
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calibration -w 4 -h 5 -s 0.025 -o camera.yml -op -oe
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calibration -w 4 -h 5 -s 0.025 -o camera.yml -op -oe
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example command line for calibration from a list of stored images:
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example command line for calibration from a list of stored images:
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imagelist_creator image_list.xml *.png
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calibration -w 4 -h 5 -s 0.025 -o camera.yml -op -oe image_list.xml
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calibration -w 4 -h 5 -s 0.025 -o camera.yml -op -oe image_list.xml
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where image_list.xml is the standard OpenCV XML/YAML
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where image_list.xml is the standard OpenCV XML/YAML
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use imagelist_creator to create the xml or yaml list
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file consisting of the list of strings, e.g.:
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file consisting of the list of strings, e.g.:
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<?xml version="1.0"?>
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<?xml version="1.0"?>
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@ -273,6 +275,7 @@ int main( int argc, char** argv )
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" [-su] # show undistorted images after calibration\n"
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" [-su] # show undistorted images after calibration\n"
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" [input_data] # input data, one of the following:\n"
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" [input_data] # input data, one of the following:\n"
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" # - text file with a list of the images of the board\n"
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" # - text file with a list of the images of the board\n"
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" # the text file can be generated with imagelist_creator\n"
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" # - name of video file with a video of the board\n"
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" # - name of video file with a video of the board\n"
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" # if input_data not specified, a live view from the camera is used\n"
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" # if input_data not specified, a live view from the camera is used\n"
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"\n" );
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"\n" );
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150
samples/cpp/filestorage_sample.cpp
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150
samples/cpp/filestorage_sample.cpp
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/*
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* filestorage_sample demonstrate the usage of the opencv serialization functionality
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*/
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#include "opencv2/core/core.hpp"
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#include <iostream>
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#include <string>
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using std::string;
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using std::cout;
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using std::endl;
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using std::cerr;
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using std::ostream;
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using namespace cv;
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void help(char** av)
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{
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cout << "usage:\n" << av[0] << " outputfile.yml.gz\n"
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<< "Try using different extensions.(e.g. yaml yml xml xml.gz etc...)\n"
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<< "This will serialize some matrices and image names to the format specified." << endl;
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}
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struct MyData
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{
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MyData() :
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A(0), X(0), id()
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{
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}
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explicit MyData(int) :
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A(97), X(CV_PI), id("mydata1234")
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{
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}
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int A;
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double X;
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string id;
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void write(FileStorage& fs) const
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{
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fs << "{" << "A" << A << "X" << X << "id" << id << "}";
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}
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void read(const FileNode& node)
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{
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A = (int)node["A"];
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X = (double)node["X"];
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id = (string)node["id"];
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}
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};
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void write(FileStorage& fs, const std::string& name, const MyData& x){
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x.write(fs);
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}
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void read(const FileNode& node, MyData& x, const MyData& default_value = MyData()){
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if(node.empty())
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x = default_value;
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else
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x = (MyData)node;
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}
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ostream& operator<<(ostream& out, const MyData& m){
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out << "{ id = " << m.id << ", ";
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out << "X = " << m.X << ", ";
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out << "A = " << m.A << "}";
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return out;
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}
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int main(int ac, char** av)
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{
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if (ac != 2)
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{
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help(av);
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return 1;
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}
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string filename = av[1];
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//write
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{
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FileStorage fs(filename, FileStorage::WRITE);
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cout << "writing images\n";
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fs << "images" << "[";
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fs << "image1.jpg" << "myfi.png" << "baboon.jpg";
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cout << "image1.jpg" << " myfi.png" << " baboon.jpg" << endl;
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fs << "]";
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cout << "writing mats\n";
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Mat R =Mat_<double>::eye(3, 3),T = Mat_<double>::zeros(3, 1);
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cout << "R = " << R << "\n";
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cout << "T = " << T << "\n";
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fs << "R" << R;
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fs << "T" << T;
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cout << "writing MyData struct\n";
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MyData m(1);
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fs << "mdata" << m;
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cout << m << endl;
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}
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//read
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{
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FileStorage fs(filename, FileStorage::READ);
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if (!fs.isOpened())
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{
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cerr << "failed to open " << filename << endl;
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help(av);
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return 1;
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}
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FileNode n = fs["images"];
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if (n.type() != FileNode::SEQ)
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{
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cerr << "images is not a sequence! FAIL" << endl;
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return 1;
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}
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cout << "reading images\n";
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FileNodeIterator it = n.begin(), it_end = n.end();
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for (; it != it_end; ++it)
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{
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cout << (string)*it << "\n";
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}
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Mat R, T;
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cout << "reading R and T" << endl;
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fs["R"] >> R;
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fs["T"] >> T;
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cout << "R = " << R << "\n";
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cout << "T = " << T << endl;
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MyData m;
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fs["mdata"] >> m;
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cout << "read mdata\n";
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cout << m << endl;
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cout << "attempting to read mdata_b\n";
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fs["mdata_b"] >> m;
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cout << "read mdata_b\n";
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cout << m << endl;
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}
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cout << "Try opening " << filename << " to see the serialized data." << endl;
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return 0;
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}
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38
samples/cpp/imagelist_creator.cpp
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38
samples/cpp/imagelist_creator.cpp
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@ -0,0 +1,38 @@
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/*this creates a yaml or xml list of files from the command line args
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*/
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#include "opencv2/core/core.hpp"
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#include <string>
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#include <iostream>
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using std::string;
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using std::cout;
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using std::endl;
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using namespace cv;
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void help(char** av)
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{
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cout << "usage:\n" << av[0] << " imagelist.yaml *.png\n"
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<< "Try using different extensions.(e.g. yaml yml xml xml.gz etc...)\n"
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<< "This will serialize this list of images or whatever with opencv's FileStorage framework" << endl;
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}
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int main(int ac, char** av)
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{
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if (ac < 3)
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{
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help(av);
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return 1;
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}
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string outputname = av[1];
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FileStorage fs(outputname, FileStorage::WRITE);
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fs << "images" << "[";
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for(int i = 2; i < ac; i++){
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fs << string(av[i]);
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}
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fs << "]";
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return 0;
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}
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