什么大不了的事,用得着跪求吗

来源: f64 于 2003-12-28 00:59:00 [档案] [旧帖] [给我悄悄话] 阅读数 : (297 bytes)

本帖于 2004-02-06 15:24:48 时间, 由普通用户 old-cotton 编辑

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.