Sure, use a framebuffer with [gemframebuffer] to capture offscreen your
scene.
The problem is to send back your texture produce by [gemframebuffer] in
pix_ domain to use [pix_movement] and [pix_multiblob], fortunately there
is [pix_snap] for this (this process is quite slow, it depends on your
hardware).
Look at :
Help => Gem => examples => 04.pix/ => 26.framebuffer_readback.pd
to see how to use it.

A note, instead off [curve3d] it is also possible to use shaders (on
fragment) to do the correction of the lens distorsion.
++

Jack



Le 17/07/2019 à 20:36, Csaba Láng a écrit :
> Looks good, but now a bigger problem came up.
>
> My aim is to correct the fish eye distortion for pix_movement and
> pix_multiblob analyses.
> Which means first I have to make the curve3d correction and then use
> those pixels in pix_multiblob.
> Is it possible?
>
> On Wed, Jul 17, 2019 at 8:16 PM Johnny Mauser
> <joson.android@googlemail.com <mailto:joson.android@googlemail.com>> wrote:
>
>     Maybe gems [curve3d]? 
>
>     Csaba Láng <langcsaba@gmail.com <mailto:langcsaba@gmail.com>>
>     schrieb am Mi., 17. Juli 2019, 20:10:
>
>         Hi list,
>         is there an easy way to correct fish eye camera image distortion?
>         I think if a vortex kind of tool.
>         Best,
>         Popesz
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