[Gimp-user] More on specify a perspective correction precisely

[Leonard Evens]

It appears to be true that the only way to specify a perspective
transformation is to move the corners of the handles to desired
locations.  But this seems to be almost impossible to achieve. I can get
very close but never right on.  If the horizontal coordinate is right,
the vertical coordinate is slightly off and vice versa.   If you are
trying to paste as in stitching panoramas, this can create problems,

The best solution would be the ability to enter the target positions
directly.  Short of that, if one could move the position a pixel at a
time by use of the arrow keys, one could get where one wanted. That
capability may have existed in an earlier version of gimp, but it no
longer seems to work.
-- 
Leonard Evens <len at math.northwestern.edu>
Mathematics Department, Northwestern University