[Robotics] Camera calibration parameters

[Paul Fitzpatrick]

Another (somewhat strange, but fun) method would be to run a standard 
calibration program (e.g. from OpenCV).  You'd need to make a plane with 
a pattern like this on it:
   http://www.vision.caltech.edu/bouguetj/calib_doc/htmls/pattern.pdf
Then light it, animate it moving around, record several views from the 
camera, and run the calibration program.

Cheers,
Paul

On 05/11/2010 06:41 AM, koen buys wrote:
> Hi Gilberto,
>
> I once figured this out in a previous version of blender. Together 
> with Herve Legrand. I will forward you our experiments back then.
> You need both the intrinsic and the external calibration matrix. The 
> external should be fairly easy to find. The internal one was more 
> difficult.
> I hope they didn't change the API of that part.
>
> Best regards,
>
> Koen Buys
>
>
> On 11 May 2010 11:14, Gilberto Echeverria <gilberto.echeverria at laas.fr 
> <mailto:gilberto.echeverria at laas.fr>> wrote:
>
>     Hello everyone,
>
>     As part of the Open Robots Simulator (now called MORSE), we are now
>     connecting Blender with other robotics software modules that do the
>     processing of the data sent by the simulation. In the case of
>     image data
>     from a camera, these modules expect the image to have an associated
>     calibration matrix.
>
>     The calibration matrix is composed with the focal point, the focal
>     length and the dimensions of the acquired image as a number of pixels
>     per unit of distance. For the simulated camera in Blender, we can
>     consider the focal point to be (0,0). For the other two parameters we
>     have been unable to find the data in Blender. We are using the Blender
>     camera object and the VideoTexture module to generate captured images.
>     Does anyone know where this information could be found in Blender?
>
>     Best regards
>
>     Gilberto
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