About laser scan reference
Hi friends,
i have some component
1 of photogrammetry via Sony
1 of drone
1 of laser scanner
i would like to merge the component but i want a laser scanner component like a reference..
thanks
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If it is not georeferenced, then there could be differences between different softs, as the origin can be set differently.
It depends, what you want to export. Both are internal RealityCapture's coordinate systems (grid plane you can see in 3D view)
XMP system is slightly different to a grid plane, it is related with cameras. RealityCapture defines a series of XML tags which naturally extend the Extended metadata format (XMP) with information like camera pose, orientation, calibration information, priors and more. Vice versa, providing these data, the application can read them and use them as constraints for geo-referencing - or more precisely - fixing the coordinate system.
XMPs allow setting a camera pose directly and thus define the coordinate system:
- define the camera position,
- define the camera position and orientation,
- define the relative or absolute position of cameras.
This opens a way for industrial business cases where the same camera setup is used over and over again and you want to ensure that the resulting scan will stay in the same coordinates.
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Ah ok. thanks for information..
but i have tested with a both oprions in local1 and the model was shifted..
i don't know why
if i use a cloud compare for allign in to my local system (pointcloud original allignemnt coordinate) the model generate, and i copy the rototraslation matrix, can i import in reality? or copy the parameters?
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This part is rotation matrix, you need to compute rotation angles form it. It is possible to do here: https://www.andre-gaschler.com/rotationconverter/
But CC could have different axis (where they are pointing) than RC, so you will need to find the right rotations.
This part should be translation in the axis
Or you can try to export some point from your original model, use them as GCPs in RealityCapture and update the model to this points. Then the models should be in the same coordinate system
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So, it is created with tfw file (in your case jgw, as you exported jpg).
TFW file created from side view, Projected:-0.0000000000 - rotation0.1438256053 - X pixel resolution0.1439776282 - Y pixel resolution0.0000000000 - rotation-128.9205612660 - X coordinate of upper right image corner-1350524.4813268578 - Y coordinate of upper right image cornerTo use the file in CAD, you should transform it into this format:0.1438256053 - X pixel resolution0.0000000000 - rotation0.0000000000 - rotation-0.1439776282 - Y pixel resolution-1350524.4813268578 - X coordinate of upper right image corner128.9205650291 - Y coordinate of upper right image cornerDo you need 5 mm ortho resolution? Is the building approximately 8 m high? -
If the building is 8 m high, then it is scaled good (there is -8 m in your jgw file)
This file could be apply automatically in some software, but in AutoCAD you need to have installed plugin: https://www.cadstudio.cz/georefimg for example.
But you need to change the file according the example from previous message (change the lines)
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Ondrei, how are you?
before i delete photoscan, i have another question.
it is possible to merge 2 component using a know control point?
i have a bad overlap beetwen laser and drone photo.. but i have a know coordinate of cp..
can i rototranslate and scale a component drone via cp with a know coordinate of control point?
you andestrand?
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So it was like this:
The GCPs have the same coordinate system? Are the scans in local coordinate system? Maybe don't use Locked in this case.
About your previous questions, it is possible to merge laser scans and images using control points. You just need to find these point on images and place them there. Then just realign project.
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i have to put the cgp in the photo and laser, alright? - Yes, if you want to merge your datasets
this is a reason because the last project when i exported the model was shifted..you remember? - I remember, but this shouldn't be the reason for movement. Is it possible to share your data with us?
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yes.. i send the link, but the upload is slowly.. 1 or 2 h
https://1drv.ms/u/s!AqWlY7FMvK9yjsNxhspaaHVC33E26A?e=lPEHdd
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