通过cvfloodfill实现空洞填充
...........................\Test
...........................\....\005.jpg
...........................\....\007.jpg
...........................\....\Debug
...........................\....\.....\Test.exe
...........................\....\.....\Test.ilk
...........................\....\.....\Test.obj
...........................\....\.....\Test.pch
...........................\....\.....\Test.pdb
...........................\....\.....\vc60.idb
...........................\....\.....\vc60.pdb
...........................\....\Test.cpp
...........................\....\Test.dsp
...........................\....\Test.dsw
...........................\....\Test.ncb
...........................\....\Test.opt
...........................\....\Test.plg