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88 lines
2.2 KiB
C++
88 lines
2.2 KiB
C++
/*
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* starter_imagelist.cpp
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*
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* Created on: Nov 23, 2010
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* Author: Ethan Rublee
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*
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* A starter sample for using opencv, load up an imagelist
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* that was generated with imagelist_creator.cpp
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* easy as CV_PI right?
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*/
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#include "opencv2/imgcodecs.hpp"
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#include "opencv2/highgui.hpp"
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#include <iostream>
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#include <vector>
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using namespace cv;
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using namespace std;
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//hide the local functions in an unnamed namespace
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namespace
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{
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void help(char** av)
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{
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cout << "\nThis program gets you started being able to read images from a list in a file\n"
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"Usage:\n./" << av[0] << " image_list.yaml\n"
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<< "\tThis is a starter sample, to get you up and going in a copy pasta fashion.\n"
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<< "\tThe program reads in an list of images from a yaml or xml file and displays\n"
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<< "one at a time\n"
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<< "\tTry running imagelist_creator to generate a list of images.\n"
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"Using OpenCV version %s\n" << CV_VERSION << "\n" << endl;
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}
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bool readStringList(const string& filename, vector<string>& l)
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{
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l.resize(0);
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FileStorage fs(filename, FileStorage::READ);
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if (!fs.isOpened())
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return false;
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FileNode n = fs.getFirstTopLevelNode();
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if (n.type() != FileNode::SEQ)
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return false;
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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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l.push_back((string)*it);
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return true;
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}
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int process(vector<string> images)
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{
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namedWindow("image", WINDOW_KEEPRATIO); //resizable window;
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for (size_t i = 0; i < images.size(); i++)
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{
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Mat image = imread(images[i], IMREAD_GRAYSCALE); // do grayscale processing?
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imshow("image",image);
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cout << "Press a key to see the next image in the list." << endl;
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waitKey(); // wait indefinitely for a key to be pressed
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}
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return 0;
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}
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}
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int main(int ac, char** av)
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{
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cv::CommandLineParser parser(ac, av, "{help h||}{@input||}");
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if (parser.has("help"))
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{
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help(av);
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return 0;
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}
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std::string arg = parser.get<std::string>("@input");
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if (arg.empty())
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{
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help(av);
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return 1;
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}
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vector<string> imagelist;
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if (!readStringList(arg,imagelist))
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{
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cerr << "Failed to read image list\n" << endl;
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help(av);
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return 1;
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}
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return process(imagelist);
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}
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