图像灰度化
..........\hello
..........\.....\Debug
..........\.....\.....\hello.exe
..........\.....\.....\hello.ilk
..........\.....\.....\hello.obj
..........\.....\.....\hello.pch
..........\.....\.....\hello.pdb

..........\.....\.....\vc60.idb
..........\.....\.....\vc60.pdb
..........\.....\hello.cpp
..........\.....\hello.dsp
..........\.....\hello.dsw
..........\.....\hello.ncb
..........\.....\hello.opt
..........\.....\hello.plg
..........\.....\新建文件夹