At Fri, 14 Oct 2005 13:48:59 +0200,
Felix E. Klee wrote:
> I want to bend an grayscale image's gray level curve so that three
> input levels are turned into three output levels.  For all six levels
> I have the precise values, for example acquired with the color picker
> tool.
> So far, I've played with the tools in the right mouse button menu
> "tools / color tools", but unsuccessfully.
> Any suggestions?

Being desperate, I fired up Micrografx Picture Publisher 5.0a, an old
Win 3.1 program.  It's capabilities for doing color correction are quite
powerful, even when measured by today's standards.  Similarly to the
Gimp it offers a dialog box for adjusting color curves, and in addition
to manipulating points on the curve with the mouse, one can enter point
coordinates with the keyboard.  This is perfect for solving the problem
I described in my original posting.

Now, although Picture Publisher 5.0a is still a very nice tool, it does
have a number of disadvantages, especially when it comes to handling
modern file formats.  Also, it - of course - doesn't run natively under
LINUX.  That's why I try to do more and more tasks with the Gimp, and
that's why I still would like to hear about a simple solution for my
problem with the Gimp.

Felix E. Klee
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