"Jason Wong" <7jw6@qlink.queensu.ca> wrote in message
news:a07dedf1.0308011607.101f428b@posting.google.c om...
> Well Fovea Pro sounds like a great program but at $800 I don't think I
> can afford it! Is there no other way to do this manually? Like as
> someone said before can I take the log of the intensity to get
> density?
Photoshop unfortunately only reports in 8-bit/channel values, even for (15
or) 16-b/ch values. So you are limited to a relative (to the brightest
pixel) Optical Density range of 0.0-2.4 . If that is enough for your
purpose, there seems to be no other way than calculating by hand, or using a
look-up table. As mentioned, make sure the image data is in Gamma 1 space.
Maybe, I'm not sure because my trial period expired, Picture Window (Pro for
16-b/ch) has such a functionality? Check
http://www.dl-c.com for details.
Bart