OpenCV — сшивание изображений из сетки изображений

Насколько я знаю, нет никаких средств для предоставления дополнительных данных движку OpenCV, кроме простого предоставления ему списка изображений. Это делает довольно хорошую работу самостоятельно. Я хотел бы проверить некоторые примеры кода и проверить, сколько времени занимает каждая операция сшивания. Из моих экспериментов с использованием панорамных реконструкций 4×6, 4×8, …, 4×20 требуемое время ЦП, похоже, увеличивается с увеличением количества перекрывающихся изображений. Я полагаю, что ваш случай потребует, по крайней мере, минуты, чтобы вычислить на современной машине.

Источник:
https://code.ros.org/trac/opencv/browser/trunk/opencv/samples/cpp/stitching.cpp?rev=6682

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42
43  // We follow to these papers:
44  // 1) Construction of panoramic mosaics with global and local alignment.
45  //    Heung-Yeung Shum and Richard Szeliski. 2000.
46  // 2) Eliminating Ghosting and Exposure Artifacts in Image Mosaics.
47  //    Matthew Uyttendaele, Ashley Eden and Richard Szeliski. 2001.
48  // 3) Automatic Panoramic Image Stitching using Invariant Features.
49  //    Matthew Brown and David G. Lowe. 2007.
50
51  #include <iostream>
52  #include <fstream>
53  #include "opencv2/highgui/highgui.hpp"54  #include "opencv2/stitching/stitcher.hpp"55
56  using namespace std;
57  using namespace cv;
58
59  void printUsage()
60  {
61      cout <<
62          "Rotation model images stitcher.\n\n"63          "stitching img1 img2 [...imgN]\n\n"64          "Flags:\n"65          "  --try_use_gpu (yes|no)\n"66          "      Try to use GPU. The default value is 'no'. All default values\n"67          "      are for CPU mode.\n"68          "  --output <result_img>\n"69          "      The default is 'result.jpg'.\n";
70  }
71
72  bool try_use_gpu = false;
73  vector<Mat> imgs;
74  string result_name = "result.jpg";
75
76  int parseCmdArgs(int argc, char** argv)
77  {
78      if (argc == 1)
79      {
80          printUsage();
81          return -1;
82      }
83      for (int i = 1; i < argc; ++i)
84      {
85          if (string(argv[i]) == "--help" || string(argv[i]) == "/?")
86          {
87              printUsage();
88              return -1;
89          }
90          else if (string(argv[i]) == "--try_gpu")
91          {
92              if (string(argv[i + 1]) == "no")
93                  try_use_gpu = false;
94              else if (string(argv[i + 1]) == "yes")
95                  try_use_gpu = true;
96              else
97              {
98                  cout << "Bad --try_use_gpu flag value\n";
99                  return -1;
100             }
101             i++;
102         }
103         else if (string(argv[i]) == "--output")
104         {
105             result_name = argv[i + 1];
106             i++;
107         }
108         else
109         {
110             Mat img = imread(argv[i]);
111             if (img.empty())
112             {
113                 cout << "Can't read image '" << argv[i] << "'\n";
114                 return -1;
115             }
116             imgs.push_back(img);
117         }
118     }
119     return 0;
120 }
121
122
123 int main(int argc, char* argv[])
124 {
125     int retval = parseCmdArgs(argc, argv);
126     if (retval) return -1;
127
128     Mat pano;
129     Stitcher stitcher = Stitcher::createDefault(try_use_gpu);
130     Stitcher::Status status = stitcher.stitch(imgs, pano);
131
132     if (status != Stitcher::OK)
133     {
134         cout << "Can't stitch images, error code = " << status << endl;
135         return -1;
136     }
137
138     imwrite(result_name, pano);
139     return 0;
140 }
141
142