Re: filmscanners: This Gamma Thing...?

["IronWorks" <ironworks@ameritech.net>]

In line with shAF's white and black point setting suggestion, there is an
excellent site at http://www.aim-dtp.net/aim/index.htm, very professional
but understandable and lots of how-to-do-its.

There is a monitor calibration section there, and a good walk-through of the
white and black point settings at
http://www.aim-dtp.net/aim/calibration/blackpoint/crt_brightness_and_contras
t.htm

Maris

----- Original Message -----
From: "shAf" <michael@shaffer.net>
To: <filmscanners@halftone.co.uk>
Sent: Saturday, February 03, 2001 12:48 AM
Subject: Re: filmscanners: This Gamma Thing...?


| Tom writes ...
|
| > ...
| > It's something with the way monitors show images, but what exactly
| is it??
| > I notice that my scanner software has a gamma adjustment and playing
| with
| > it I noticed that it changes the way the image appear on the screen.
|
|     More than monitors, most devices have a specific gamma associated
| with them ... scanners, printers, digital cameras.
|
| > But what exactly is this mysterious gamma thing?
|
|     Each device has an associated "black" and "white", both of which
| are generally similar across all devices (forget for now the color of
| white, eg warm vs cold).  Between black and white however, is how a
| device responds to the data (eg, monitor), or its stimulation by light
| (eg, camera+film).  This response is generally refered to as the
| device's "gamma".