[sfm/clustering] Add a scene clustering approach openMVG#857

- Add the interface to compute the camera cluster on a OpenMVG sfm_data scene.
- fix a bug in domset.cc @rperrot
- use more c++11 feature in the code
- fix backward View id mapping in main_ComputeClusters

- removed the nanoflann dependency

src/software/SfM/CMakeLists.txt

@@ -322,7 +322,6 @@ INSTALL(TARGETS openMVG_main_ExportCameraFrustums DESTINATION bin/)
 SET_PROPERTY(TARGET openMVG_main_openMVG2NVM PROPERTY FOLDER OpenMVG/software)
 INSTALL(TARGETS openMVG_main_openMVG2NVM DESTINATION bin/)
 
-
 # -
 # Use openCV Feature detector to describe the images
 # -
@@ -386,3 +385,4 @@ SET(OPENMVG_TUTORIAL_IN_FILE "${CMAKE_CURRENT_LIST_DIR}/SfM_SequentialPipeline.p
 CONFIGURE_FILE(${OPENMVG_TUTORIAL_IN_FILE}
     "${CMAKE_CURRENT_BINARY_DIR}/SfM_SequentialPipeline.py" @ONLY)
 
+add_subdirectory(clustering)

src/software/SfM/clustering/CMakeLists.txt

@@ -0,0 +1,14 @@
+add_subdirectory(domSetLibrary)
+
+# compute clusters for a given sfm_data.bin
+add_executable(openMVG_main_ComputeClusters main_ComputeClusters.cpp)
+target_link_libraries(openMVG_main_ComputeClusters 
+  openMVG_system
+  openMVG_image
+  openMVG_features
+  openMVG_sfm
+  domset)
+
+set_property(TARGET openMVG_main_ComputeClusters PROPERTY FOLDER OpenMVG/software/clustering)
+install(TARGETS openMVG_main_ComputeClusters DESTINATION bin/)
+

src/software/SfM/clustering/domSetLibrary/CMakeLists.txt

@@ -0,0 +1 @@
+add_library( domset domset.cc domset.h types.h )