About the intrinsic matrix in data

[zzhat0706]

Thanks for the great work and data!

I am transfering the camera pose data to other format. But neighter metadata.json nor *_camera.json had no intrinsic data inside(focal length and cx, cy).

Also I used .blender's focal data, but either way not worked for me, maybe this is because .blender file use different extrinsic matrix.

So can you tell me your intrinsic values or the way to know those values? thx

[xiumingzhang]

Hi. Sorry for the late reply but are you referring to the data released by us? If so, `metadata.json` has a field called `cam_angle_x`, which you can convert to the focal length using simple trigonometric identities. As for `cx` or `cy`, you can assume them to be always half of the image width or height. Closing this but feel free to reopen this issue with more questions.

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On Tue, Aug 24, 2021 at 5:29 AM zzhat0706 ***@***.***> wrote: Thanks for the great work and data! I am transfering the camera pose data to other format. But neighter metadata.json nor *_camera.json had no intrinsic data inside(focal length and cx, cy). Also I used .blender's focal data, but either way not worked for me, maybe this is because .blender file use different extrinsic matrix. So can you tell me your intrinsic values or the way to know those values? thx — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#6>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACXICPSYEBSVV3Q5MDXC6I3T6NQ7DANCNFSM5CWNSARQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&utm_campaign=notification-email> .