Update stitching.cpp

samples/cpp/stitching.cpp

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-//  copy or use the software.
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-//
-//                          License Agreement
-//                For Open Source Computer Vision Library
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-//M*/
 
-#include <iostream>
-#include <fstream>
 #include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui.hpp"
 #include "opencv2/stitching.hpp"
 
+#include <iostream>
+
 using namespace std;
 using namespace cv;
 
 bool try_use_gpu = false;
+bool divide_images = false;
 Stitcher::Mode mode = Stitcher::PANORAMA;
 vector<Mat> imgs;
 string result_name = "result.jpg";
 
-void printUsage();
+void printUsage(char** argv);
 int parseCmdArgs(int argc, char** argv);
 
 int main(int argc, char* argv[])
@@ -73,25 +33,28 @@ int main(int argc, char* argv[])
     }
 
     imwrite(result_name, pano);
+    cout << "stitching completed successfully\n" << result_name << " saved!";
     return 0;
 }
 
 
-void printUsage()
+void printUsage(char** argv)
 {
     cout <<
-        "Images stitcher.\n\n"
-        "stitching img1 img2 [...imgN]\n\n"
-        "Flags:\n"
-        "  --try_use_gpu (yes|no)\n"
-        "      Try to use GPU. The default value is 'no'. All default values\n"
-        "      are for CPU mode.\n"
-        "  --mode (panorama|scans)\n"
-        "      Determines configuration of stitcher. The default is 'panorama',\n"
-        "      mode suitable for creating photo panoramas. Option 'scans' is suitable\n"
-        "      for stitching materials under affine transformation, such as scans.\n"
-        "  --output <result_img>\n"
-        "      The default is 'result.jpg'.\n";
+         "Images stitcher.\n\n" << "Usage :\n" << argv[0] <<" [Flags] img1 img2 [...imgN]\n\n"
+         "Flags:\n"
+         "  --d3\n"
+         "      internally creates three chunks of each image to increase stitching success"
+         "  --try_use_gpu (yes|no)\n"
+         "      Try to use GPU. The default value is 'no'. All default values\n"
+         "      are for CPU mode.\n"
+         "  --mode (panorama|scans)\n"
+         "      Determines configuration of stitcher. The default is 'panorama',\n"
+         "      mode suitable for creating photo panoramas. Option 'scans' is suitable\n"
+         "      for stitching materials under affine transformation, such as scans.\n"
+         "  --output <result_img>\n"
+         "      The default is 'result.jpg'.\n\n"
+         "Example usage :\n" << argv[0] << " --d3 --try_use_gpu yes --mode scans img1.jpg img2.jpg";
 }
 
 
@@ -99,14 +62,15 @@ int parseCmdArgs(int argc, char** argv)
 {
     if (argc == 1)
     {
-        printUsage();
+        printUsage(argv);
         return -1;
     }
+
     for (int i = 1; i < argc; ++i)
     {
         if (string(argv[i]) == "--help" || string(argv[i]) == "/?")
         {
-            printUsage();
+            printUsage(argv);
             return -1;
         }
         else if (string(argv[i]) == "--try_use_gpu")
@@ -122,6 +86,10 @@ int parseCmdArgs(int argc, char** argv)
             }
             i++;
         }
+        else if (string(argv[i]) == "--d3")
+        {
+            divide_images = true;
+        }
         else if (string(argv[i]) == "--output")
         {
             result_name = argv[i + 1];
@@ -148,7 +116,18 @@ int parseCmdArgs(int argc, char** argv)
                 cout << "Can't read image '" << argv[i] << "'\n";
                 return -1;
             }
-            imgs.push_back(img);
+
+            if (divide_images)
+            {
+                Rect rect(0, 0, img.cols / 2, img.rows);
+                imgs.push_back(img(rect).clone());
+                rect.x = img.cols / 3;
+                imgs.push_back(img(rect).clone());
+                rect.x = img.cols / 2;
+                imgs.push_back(img(rect).clone());
+            }
+            else
+                imgs.push_back(img);
         }
     }
     return 0;