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/**
* @file OpenCV.cpp
* @date 2015-12-04
* @author Hubert Degaudenzi
*
* @copyright 2012-2025 Euclid Science Ground Segment
*
* This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General
* Public License as published by the Free Software Foundation; either version 3.0 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <map> // for map
#include <string> // for allocator, string
#include <iostream>
#include <opencv2/opencv.hpp>
#include "ElementsKernel/Exception.h" // for Exception"
#include "ElementsKernel/Main.h" // for MAIN_FOR
#include "ElementsKernel/Program.h" // for Program
#include "ElementsKernel/Unused.h" // for ELEMENTS_UNUSED
using boost::program_options::value;
using std::map;
using std::string;
namespace Elements::Examples {
class OpenCV final : public Program {
public:
OptionsDescription defineSpecificProgramOptions() override {
OptionsDescription config_options{"OpenCV example program options"};
auto add = config_options.add_options();
add("image-path", value<string>(), "A string option without default value");
return config_options;
}
ExitCode mainMethod(ELEMENTS_UNUSED map<string, VariableValue>& args) override {
const auto log = Logging::getLogger("OpenCV");
if (args["image-path"].empty()) {
log.error() << "usage: DisplayImage.out <Image_Path>";
throw Exception("No image path provided", ExitCode::USAGE);
}
cv::Mat image;
image = imread(args["image-path"].as<string>(), cv::IMREAD_COLOR);
if (!image.data) {
log.error() << "No image data";
throw Exception("No image data", ExitCode::DATAERR);
}
namedWindow("Display Image", cv::WINDOW_AUTOSIZE);
imshow("Display Image", image);
cv::waitKey(0);
return ExitCode::OK;
}
};
} // namespace Elements::Examples
/**
* Implementation of a main using a base class macro
* This must be present in all Elements programs
*/
MAIN_FOR(Elements::Examples::OpenCV)