On 18 Oct 2005 at 6:47, Paul Stenquist wrote: > A good illustration. However, I wouldn't say that 02 and 03 are > "overall" lightening and darkening curves. The end points remain fixed. > They are midrange lightening and darkening curves. Because the ends are > ffixed, the brightest highlights and deepest shadows remain unchanged. > Rather than calling 04 a "gamma correction curve," which cold be > anything, I would describe it as a curve intended to increase midrange > contrast. Once again, the ends are fixed.
Gamma adjustments only effect the input/output relationships of the sample values between the fixed minimum and maximum values. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
