什麽大不了的事,用得著跪求嗎

來源: f64 於 2003-12-28 00:59:00 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (297 bytes)

本文內容已被 [ f64 ] 在 2004-02-06 15:24:48 編輯過。如有問題，請報告版主或論壇管理刪除.

Open the image in photoshop.
in navigator/info/histogram pallet, click histogram.
make sure choose "expanded view" and check "show statistics".

Select an area, the histopgram pallet shows the mean value, median value and std deviation of luminosity of all pixels in the selected area.