Using C++ and OpenCV image box to achieve the recognition, and the box marked with a red line marked. Can be used for image segmentation, positioning and so on.

SquareDetection
...............\debug
...............\.....\SquareDetection.exe
...............\.....\SquareDetection.ilk
...............\.....\SquareDetection.pdb
...............\SquareDetection
...............\...............\Debug
...............\...............\.....\BuildLog.htm
...............\...............\.....\mt.dep
...............\...............\.....\SquareDetection.exe.embed.manifest
...............\...............\.....\SquareDetection.exe.embed.manifest.res
...............\...............\.....\SquareDetection.exe.intermediate.manifest
...............\...............\.....\SquareDetection.obj
...............\...............\.....\vc80.idb
...............\...............\.....\vc80.pdb
...............\...............\SquareDetection.cpp
...............\...............\SquareDetection.vcproj
...............\...............\SquareDetection.vcproj.LUCKFISH.LuckFish.user
...............\SquareDetection.ncb
...............\SquareDetection.sln

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