用到的图像\gantrycrane.png
..........\imexpropsSynthesizeImage.png
..........\pillsetc.png
..........\snowflakes.png
..........\tape.png
..........\Thumbs.db
ex_18_1.m
ex_18_2.m
ex_18_3.m
ex_18_4.m
ex_18_5.m
ex_18_6.m
用到的图像