Hi,
I am searching for a best practice approach to tell if the final output
is flipped relative to the input and I need to retrieve this information
in a module gui that comes *before* the flip module.
Background: I am working on a module that will be able to do automatic
correction of perspective distortions. This involves two independent
corrections, in horizontal and vertical direction, respectively. The
parameters will be different for both directions, so it's good to have
this module before flip, so it can act in the camera coordinate system.
This way the two coordinate axes are clearly defined. Flipping the image
later in pixelpipe flips the image but does not alter the module's effect.
However, for the user I need to give reasonable names to the module
parameters. I could use internal labels like "a" and "b" and let the
user figure out what direction this is currently related to. But it
would be better to have labels that say "horizontal" and "vertical". If
I could retrieve the orientation relative to the input image in
gui_update() I could put reasonable labels to the module's sliders.
Anyone with an idea?
Ulrich
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