Trapezoidal deformation ?
Hello all,
Does anyone know how it would be possible to produce a _trapezoidal_
deformation (not pin / barrel) with jit.repos or jt.mxform2d (or a
shader...) ?
The reason is : my camera isn't absolutely in the front axis of the
object I want to capture, and I need to compensate this deformation
of perspective. I browsed the helps and documentations but perhaps
does it exceed my knowledge in maths ;-)
Thank you very much...
Thierry
----------------------------------------
Thierry Fournier
http://www.thierryfournier.net
hello thierry,
i think the most interesting way to achieve this performance-wise is
to move this processing into OpenGL. There geometry transform gives
you all trapeze-correction practically for free. when combining this
with a nurbs type surface you end up having an extremely flexible lens-
correction. moving individual points of the nurb controlgrid lets you
manipulate parts of the image independantly. the whole trick is to
capture the nurb in a texture for further processing.
see patch below
hth
/*j
save as:
OpenGL_lens_correction