Acquiring FOV

[yesennes]

This isn't a bug so much as a question, so if there is a better place to ask I would appreciate being redirected there.

I am making an augmented reality program that needs to draw on the world. The graphics library I am using requires an angular horizontal field of view. As far as I understand, the FOV (or some equivalent information) of the camera is required to render images against the real world that seem fixed. I notice that ptam does a very good job of rendering the black grid on the tracking surface. Is there anyway I could get the FOV or related information out of the code?

[stephanweiss]

Hi,

PTAM uses the ATAN camera model which is described here:

https://hal.inria.fr/inria-00267247/document

From the camera parameters in the yaml file, you should then be able to compute the FoV. Note that PTAM uses normalized parameters.

Hope this helps.

Best,

Stephan

---

Von: yesennes [email protected]
Gesendet: Dienstag, 12. Juli 2016 16:55
An: ethz-asl/ethzasl_ptam
Betreff: [ethz-asl/ethzasl_ptam] Acquiring FOV (#87)

This isn't a bug so much as a question, so if there is a better place to ask I would appreciate being redirected there.

I am making an augmented reality program that needs to draw on the world. The graphics library I am using requires an angular horizontal field of view. As far as I understand, the FOV (or some equivalent information) of the camera is required to render images against the real world that seem fixed. I notice that ptam does a very good job of rendering the black grid on the tracking surface. Is there anyway I could get the FOV or related information out of the code?

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[yesennes]

Thank you!