... the fork insight3dng, in SourceForge, of insight3d, directly included in the source in the subdirectories "sift" and "sift_win" of the "insight3d" directory. Maybe you can add these into this GitHub repository, as well. There are differences in the respective Makefiles for handling "sift" that also need to be examined, and differences in the file "tool_matching.cpp" that involve sift that might entail changes.
... the fork insight3dng, in SourceForge, of insight3d, directly included in the source in the subdirectories "sift" and "sift_win" of the "insight3d" directory. Maybe you can add these into this GitHub repository, as well. There are differences in the respective Makefiles for handling "sift" that also need to be examined, and differences in the file "tool_matching.cpp" that involve sift that might entail changes.