Götz Echtenacher wrote:
…what do you mean by 2D-2D and 2D-3D?
You mean each CP in 10 images and 7 CPs overall?
You can place control points (CPs) among 2D pictures without 3D coordinates. So the recommendation here is at least 10 CPs when placing them just in the 2D, and at least 7 CPs when placing them also in the 3D.
To be honest, for fix topicstarter issue in this project will be enough group by EXIF cameras, align several times for refine alignment and use downsampled 2-4 times images in meshing. And result will be near the same (same but better) as in Competitor.
Also better do not touch weight of control points. default 10 is good for 99.99% of projects.
What do you mean by “good value”?
The preset? That would be 10.
I mean the “max feature reprojection error” on alignment. I am usually putting it between 1 and 3.
Oh, that one.
Two.
Factory settings can be restored by the upper of the tiny buttons on the lower left of each settings window (plus save and restore customs).
In my (topicstarter) project, the max reprojection error I get after cleaning it with the competitor is 0,5.
When I use that in RC, I get several components.
So no good.
I usually use normal with factor 2.
More will not help because I will loose detail in the corners.
I have not tried to use exif grouping yet because in my cases it often does more damage than good.
But I shall give it a try when I get around to it again.
Hello everyone,
using CR for survey-grade scanning, I’m very interested in making sure, that accuracy is as best as possible in all captured areas.
Having control over the TIE-POINTS which are used for camera alignment and being able to manually take some tie-points out -either by hand/lasso selection or via a tool that allows gradual deletion of tie-points based on their estimated precision value- would make a lot of sense IMHO.
Two examples:
In one scene, there is occasional car traffic around a large industrial building. No chance to not have them on some of the lets say 2.000 images in the set during a couple of hours of aerial flight. Those things are appearing, moving and disappearing, leaving tie point fragments here and there, which I think, should not be used for global alignment. I wish I could manually delete those tie points with the lasso tool.
In another scene there is a lot of vegetation while the wind is blowing quite a bit. Now I would rather want the cameras to be aligned to static points than permanently moving foliage. I wish I could delete those green points, based on a colour picker tool with some settings for the inclusion of similar points (tones of green).
I’d like to know, if my assumption is correct when I think that manually cleaning the tie-point-cloud can lead to higher accuracy i.e. via more realistic camera calibration.
What do the devs think about that?
Best regards, Bodo