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RT-studios / camera-pnpoint

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2 Questions #10

Open chamill625 opened 10 months ago

chamill625 commented 10 months ago

Hi, I was just wondering if the reprojection error corresponded to any real world value (like accuracy to Xmm for example) or is it just an arbitrary measure of how well the algorithm has matched the points? If so, could you give a rough indication of what a ‘good’ vs an ‘excellent’ score would be?

My other question was whether it might be possible in future versions to lock camera position and solve pose only for rotation. When doing verified views in ArchViz, you typically have a surveyor geo-locate where the camera tripod sat, so you would have known co-ordinates for the camera’s xyz location that you’d want to keep, and just need the rotation you’d want to solve for.

really awesome and exciting addon - amazing work!

RT-studios commented 10 months ago

Hello chamill, thanks a lot for the feedback. The reprojection error is given in image coordinate units (pixels) and is calculated as an RMS error between the provided image coordinates and the projected object coordinates. An indication for a good score is difficult to give since it depends a lot on image size (resolution) and point coverage.

Regarding your suggestion on the 'tripod' mode, this is something I will need to investigate further but it's definitely a nice feature to add. It's noted :) RT

chamill625 commented 10 months ago

Awesome! Thank you so much for the quick reply! C