謝謝。看看這兩個LINK吧,會比我解釋得更清楚。

來源: 2008-03-19 11:32:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀:
http://www.singh-ray.com/grndgrads.html

http://www.cs.mtu.edu/~shene/DigiCam/User-Guide/filter/polarizer.html