NavVis VLX embedded pano images

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smacl
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Re: NavVis VLX embedded pano images

Post by smacl »

ericguizzetti wrote: Tue Mar 21, 2023 12:19 amThis looks more like a projection of the point cloud than using mirror balls?
Very much the same thing. A panoramic photo is simply one where pixels are spaced at regular horizontal and vertical angles, as opposed to an orthophoto where they're spaced at regular cartesian intervals or a flat photo where they are in a perspective projection. How you choose to project the point cloud onto the photography and display the result varies, but you can expect to see some curvature on your pano images unless you use a very narrow field of view. Personally, I like using the panos alongside orthographic views such as plans or elevations as this can simplify drawing detail. The mirror ball is just a full screen view of the point cloud and model projected onto the pano photography using a default field of view suitable to the camera in use, with the result that straight lines will appear curved unless zoomed in close.
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Re: NavVis VLX embedded pano images

Post by smacl »

ericguizzetti wrote: Tue Mar 21, 2023 12:21 amThe 360-degree views from the VLX are pretty low quality anyway. Not sure why you would work so hard for such crappy views...
Depends very much on what you're using them for. In topographic work, they're great for things like picking up concrete inspection covers on a concrete pavement, which can be very difficult to see in the point cloud. To be fair, the NavVis point cloud is dense with minimal noise, so the photography is not needed nearly so much as with other mobile mapping systems. See the example below for picking up a manhole with a Geoslam.

Image

For adding detail, the usefulness of the images is also a function of how often they're taken as well as the individual image quality. More frequent lower resolution images can be more useful than infrequent higher resolution images. Lots of very high-resolution images can also significantly slow down data transfer and processing so it is a matter of finding the right balance for the job in hand. What you want for a pano tour inside a building is very different from what you want to complete a topo survey model.
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Re: NavVis VLX embedded pano images

Post by VXGrid »

smacl wrote: Tue Mar 21, 2023 9:54 am
ericguizzetti wrote: Tue Mar 21, 2023 12:21 amThe 360-degree views from the VLX are pretty low quality anyway. Not sure why you would work so hard for such crappy views...
Depends very much on what you're using them for. In topographic work, they're great for things like picking up concrete inspection covers on a concrete pavement, which can be very difficult to see in the point cloud. To be fair, the NavVis point cloud is dense with minimal noise, so the photography is not needed nearly so much as with other mobile mapping systems. See the example below for picking up a manhole with a Geoslam.

For adding detail, the usefulness of the images is also a function of how often they're taken as well as the individual image quality. More frequent lower resolution images can be more useful than infrequent higher resolution images. Lots of very high-resolution images can also significantly slow down data transfer and processing so it is a matter of finding the right balance for the job in hand. What you want for a pano tour inside a building is very different from what you want to complete a topo survey model.
Dito
For smaller objects there is no other way to detect it without panoramas.
Try power sockets in indoor applications.
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Re: NavVis VLX embedded pano images

Post by sim.herrod »

ericguizzetti wrote: Tue Mar 21, 2023 12:21 am
sim.herrod wrote: Wed Feb 09, 2022 9:14 am
A_Axelsson wrote: Tue Feb 08, 2022 7:42 pm Has anyone been able to import the E57 files containg panoramas into ReCap hand have them show up as Realviews there?
It seems that all the required info about the panoramas are there in the metadata in the E57-file..
We haven't tried that, purely because we try and avoid ReCap when at all possible.
The 360-degree views from the VLX are pretty low quality anyway. Not sure why you would work so hard for such crappy views...
Because 8192x4096 panos from the VLX are more than adequate for internal photo tours, and capturing panos with a better camera in addition to the VLX would add unnecessary time and costs to the job.

There's a time and a place for hi-res Mosaic 51/Weiss Civetta type panos or DSLR/Nodal Ninja, but the VLX panos are more than suitable in the right circumstances.
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Re: NavVis VLX embedded pano images

Post by jitenderr786 »

Hi all,

I hope this message finds you well. I have a question regarding Navis SiteMaker version 22.04 on the Ubuntu operating system. When exporting in the E57 file format using advanced settings with "--e57-with-panos," I'm unsure about the corresponding setting for exporting PTS data with panoramas included. Is the correct setting "--pts-with-panos"? Your guidance on this matter would be highly appreciated.
e57.jpg
Thank you,
Jitender

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Re: NavVis VLX embedded pano images

Post by smacl »

jitenderr786 wrote: Wed Jan 31, 2024 1:04 pm Hi all,

I hope this message finds you well. I have a question regarding Navis SiteMaker version 22.04 on the Ubuntu operating system. When exporting in the E57 file format using advanced settings with "--e57-with-panos," I'm unsure about the corresponding setting for exporting PTS data with panoramas included. Is the correct setting "--pts-with-panos"? Your guidance on this matter would be highly appreciated.
e57.jpg
Thank you,
Jitender
PTS is a very simple flat text format which does not include the ability to store pano images. To use panos with a PTS file you'd need to export a trajectory file including image name, camera position and camera pose and a set of matching JPG files. I'm not that familiar with Ivion but would guess you can do it.
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