how to specify camera's intrinsic parameters

[Abhishek Dutta]

Hi,

Using the "Camera Calibration Toolbox for Matlab" (http://
www.vision.caltech.edu/bouguetj/calib_doc/), I am able to get the
intrinsic parameters of my camera.

Is there is a way to specify the intrinsic parameters of the camera
used in pbrt for renderings? the pbrtLookAt() method only allows to
setup the extrinsic parameters of the camera (rotation+translation).

Bye

[Matt Pharr]

That's an interesting model.  I think that implementing it in pbrt would require writing a new Camera implementation.  In particular, based on the information at

http://www.vision.caltech.edu/bouguetj/calib_doc/htmls/parameters.html

it looks like what would be necessary would be to implement the inverse mapping to go from pixels to directions, which is apparently provided in Matlab code in the normalize.m code.  I haven't looked at that file, so don't know how easily it could be converted to C++...

-matt

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[Abhishek Dutta]

Hi,
I am working on writing a new Camera implementation that can be initialized using the intrinsic parameters obtained from camera calibration toolbox. I need this functionality for "3D to 2D Registration" required in my MSc. research project.

I will update you all via this forum when I have something useful to share. Meanwhile, ideas regarding this new Camera implementation are welcome.

Thanks

Abhishek

--
Abhishek
http://www-users.cs.york.ac.uk/~abhishek/