thierry@thierryfourni

Does anyone know how it would be possible to produce a _trapezoidal_ 

deformation (not pin / barrel) with jit.repos or jt.mxform2d (or a 

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 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 ;-)

----------------------------------------
Thierry Fournier
http://www.thierryfournier.net

trapezoidal-deformation

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.

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.

Trapezoidal deformation ?