vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

2026-08-22 00:11:13 +08:00
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+/*M///////////////////////////////////////////////////////////////////////////////////////
+ //
+ //  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+ //
+ //  By downloading, copying, installing or using the software you agree to this license.
+ //  If you do not agree to this license, do not download, install,
+ //  copy or use the software.
+ //
+ //
+ //                           License Agreement
+ //                For Open Source Computer Vision Library
+ //
+ // Copyright (C) 2014, Biagio Montesano, all rights reserved.
+ // Third party copyrights are property of their respective owners.
+ //
+ // Redistribution and use in source and binary forms, with or without modification,
+ // are permitted provided that the following conditions are met:
+ //
+ //   * Redistribution's of source code must retain the above copyright notice,
+ //     this list of conditions and the following disclaimer.
+ //
+ //   * Redistribution's in binary form must reproduce the above copyright notice,
+ //     this list of conditions and the following disclaimer in the documentation
+ //     and/or other materials provided with the distribution.
+ //
+ //   * The name of the copyright holders may not be used to endorse or promote products
+ //     derived from this software without specific prior written permission.
+ //
+ // This software is provided by the copyright holders and contributors "as is" and
+ // any express or implied warranties, including, but not limited to, the implied
+ // warranties of merchantability and fitness for a particular purpose are disclaimed.
+ // In no event shall the Intel Corporation or contributors be liable for any direct,
+ // indirect, incidental, special, exemplary, or consequential damages
+ // (including, but not limited to, procurement of substitute goods or services;
+ // loss of use, data, or profits; or business interruption) however caused
+ // and on any theory of liability, whether in contract, strict liability,
+ // or tort (including negligence or otherwise) arising in any way out of
+ // the use of this software, even if advised of the possibility of such damage.
+ //
+ //M*/
+
+#include <iostream>
+#include <opencv2/opencv_modules.hpp>
+
+#ifdef HAVE_OPENCV_FEATURES
+
+#include <opencv2/line_descriptor.hpp>
+#include <opencv2/core/utility.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/features.hpp>
+#include <opencv2/highgui.hpp>
+
+#include <vector>
+
+using namespace cv;
+using namespace cv::line_descriptor;
+
+static const std::string images[] =
+{ "cameraman.jpg", "church.jpg", "church2.png", "einstein.jpg", "stuff.jpg" };
+
+static const char* keys =
+{ "{@image_path | | Image path }" };
+
+static void help()
+{
+  std::cout << "\nThis example shows the functionalities of radius matching " << "Please, run this sample using a command in the form\n"
+      << "./example_line_descriptor_radius_matching <path_to_input_images>/" << std::endl;
+}
+
+int main( int argc, char** argv )
+{
+  /* get parameters from comand line */
+  CommandLineParser parser( argc, argv, keys );
+  String pathToImages = parser.get < String > ( 0 );
+
+  /* create structures for hosting KeyLines and descriptors */
+  int num_elements = sizeof ( images ) / sizeof ( images[0] );
+  std::vector < Mat > descriptorsMat;
+  std::vector < std::vector<KeyLine> > linesMat;
+
+  /*create a pointer to a BinaryDescriptor object */
+  Ptr < BinaryDescriptor > bd = BinaryDescriptor::createBinaryDescriptor();
+
+  /* compute lines and descriptors */
+  for ( int i = 0; i < num_elements; i++ )
+  {
+    /* get path to image */
+    std::stringstream image_path;
+    image_path << pathToImages << images[i];
+    std::cout << image_path.str().c_str() << std::endl;
+
+    /* load image */
+    Mat loadedImage = imread( image_path.str().c_str(), 1 );
+    if( loadedImage.data == NULL )
+    {
+      std::cout << "Could not load images." << std::endl;
+      help();
+      exit( -1 );
+    }
+
+    /* compute lines and descriptors */
+    std::vector < KeyLine > lines;
+    Mat computedDescr;
+    bd->detect( loadedImage, lines );
+    bd->compute( loadedImage, lines, computedDescr );
+
+    descriptorsMat.push_back( computedDescr );
+    linesMat.push_back( lines );
+
+  }
+
+  /* compose a queries matrix */
+  Mat queries;
+  for ( size_t j = 0; j < descriptorsMat.size(); j++ )
+  {
+    if( descriptorsMat[j].rows >= 5 )
+      queries.push_back( descriptorsMat[j].rowRange( 0, 5 ) );
+
+    else if( descriptorsMat[j].rows > 0 && descriptorsMat[j].rows < 5 )
+      queries.push_back( descriptorsMat[j] );
+  }
+
+  std::cout << "It has been generated a matrix of " << queries.rows << " descriptors" << std::endl;
+
+  /* create a BinaryDescriptorMatcher object */
+  Ptr < BinaryDescriptorMatcher > bdm = BinaryDescriptorMatcher::createBinaryDescriptorMatcher();
+
+  /* populate matcher */
+  bdm->add( descriptorsMat );
+
+  /* compute matches */
+  std::vector < std::vector<DMatch> > matches;
+  bdm->radiusMatch( queries, matches, 30 );
+  std::cout << "size matches sample " << matches.size() << std::endl;
+
+  for ( int i = 0; i < (int) matches.size(); i++ )
+  {
+    for ( int j = 0; j < (int) matches[i].size(); j++ )
+    {
+      std::cout << "match: " << matches[i][j].queryIdx << " " << matches[i][j].trainIdx << " " << matches[i][j].distance << std::endl;
+    }
+
+  }
+
+}
+
+#else
+
+int main()
+{
+    std::cerr << "OpenCV was built without features module" << std::endl;
+    return 0;
+}
+
+#endif // HAVE_OPENCV_FEATURES