Hi Peter,
some ideas from a typical photo workflow:
perspective correction - select some prominent lines from the image
and "get them straight"
alignment of horizon line - in cooperation with an automated guess?
crop & rotate, set - virtual photography ala google earth?
aspect ratio perhaps even with composition aids (rule of
thirds, Westhoff's Diagonal Method, etc)
levels, curves - could support the user's intention more directly:
- mark places in the image, which should be brighter/darker,
or have more/less contrast or modified colors
- the whitepoint, graypoint pickers could be adjustable
markers
on the image. Or a completely different method for
whitebalance?
- if tones are getting compressed, better control of where
the
clipping happens (separately for each of R,G,B, Value)
gradation map - nearly the same: map image points to positions in the gradient
greetings,
peter
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