Comparitive scans, Leica, Faro, Trimble

Faro S150, S350, X30, X130, X130HDR, X330, X330HDR, M70, Trimble X7, Leica RTC360, HDS6*00, HDS7000, Z+F IMAGER 5016, 5010X, 5010C, 5006H, 5006EX & PROFILER 9012 etc
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HagaeusBygghantverk
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Comparitive scans, Leica, Faro, Trimble

Post by HagaeusBygghantverk »

Hi all!

I study 3d and am now doing my internship at the Swedish National Heritage Board. As a project to help all museums to make an informed choice when buying scanners I have scanned two 18:th century rooms at the open air museum Skansen in Stockholm with the following scanners:

• Faro Fokus s70
• Leica BLK360
• Leica RTC360
• Leica BLK2GO
• Trimble TX7 (next week)

The reason I choose those rooms is that they are a bit challanging. The walls are polished Mahogany and very rich in detail. I was hoping to clean and align the pointclouds before publishing them here but time is running out. I am also more of a mesh guy and have no fancy software for pointclouds.

You are free to download and compare the pointclouds for deviation, noice and so on. The Faro cloud is done with markers so it SHOULD be the most exact one on the overall shape. There is of course no absolute truth to compare to exept for the real thing. If you extract measures that is easy to check on the actual building I can try to do that Tuesday when I go back to scan with the Trimble. Some furniture has shifted between the scans unfortunately but the walls are probably in the same spot.

And Please share your results here with everyone!

Link to onedrive folder with the scans:
https://1drv.ms/u/s!AkeoPFpwJxJeiIVh2cX ... w?e=aF9xiE

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Re: Comparitive scans, Leica, Faro, Trimble

Post by landmeterbeuckx »

That's an interesting case you did. I'll check it out later.
Comparisons are always nice but if you could just mention the details of every scan like the settings with which you scanned.
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Re: Comparitive scans, Leica, Faro, Trimble

Post by HagaeusBygghantverk »

Since it is for museum documentation I have used the highest settings for everthing except on the Faro as we had very limited time and it takes a lot of time at high. So we did high only on the tiled stoves to get some reference of that. The rest is at medium. Don't remember what the settings are called on the Faro as it was a couple of months ago.

I am in the process of writing a report with all scantimes and costs and the like. It has to be in Swedish unfortunately, but I thing you can get the numbers out of it with some help from automatic translators. Good feedback from this forum will be used in the report if consent is given.

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Re: Comparitive scans, Leica, Faro, Trimble

Post by Peyman Bashiri »

Give Z+F 5016 a try as well.

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Re: Comparitive scans, Leica, Faro, Trimble

Post by HagaeusBygghantverk »

I would if I could get my hands on one in Stockholm.

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Re: Comparitive scans, Leica, Faro, Trimble

Post by dhirota »

Thomas:

I decided to download and look at your scans since I am interested in heritage information.

BLK2Go.e57 = 0.759 GB
BLK360.e57 = 6.493 GB
FARO.e57 = 3.822 GB
RTC360.e57 = 18.786 GB

I am still not sure what parameters are important for the Swedish Heritage Board to consider when looking for a documentation sensor system. There are probably too many to discuss on this thread, but from the scanned heritage projects that we have completed, image clarity and uniformity have been important parameters as well as the detail of objects.

It does not appear that any of the sensors that you tested have calibrated LED illumination for scanning darken or totally dark rooms? I believe Z+F has the only sensor with integrated LED illumination.
Peyman Bashiri wrote:
Fri May 08, 2020 7:11 pm
Give Z+F 5016 a try as well.
BLK360-05-09-2020 11-15-40 AM.jpg
BLK360-05-09-2020 11-36-10 AM.jpg
RTC360-05-09-2020 01-23-05 PM.jpg
RTC360-05-09-2020 01-24-03 PM.jpg

Since this is about heritage, I thought that I would add a link from a German Museum that has used the NavVIS IndoorViewer information for their website.

https://digital.deutsches-museum.de/virtuell/

I have also added some information the Honolulu Museum of Art scans that we completed in 2018 with our NavVIS M3 of approximately 2,000 SM that we completed in less than 2 hours.

HMA-RAW.ply = 5.4 GB
HMA-5mm.ply = 3.6 GB
HMA-5mm.e57 = 3.1 GB

1.Screenshot from 2020-05-09 08-58-41.jpg
2.Screenshot from 2020-05-09 09-03-02.jpg
3.Screenshot from 2020-05-09 09-09-43.jpg
4.Screenshot from 2020-05-09 10-10-44.jpg

Data file was a single mobile trolley file imported into NavVIS SiteMaker for post-processing for automatic scan registration and filtered to a 5mm grid with the individual images processed to panorama images and merged with the scans to generate the colored point clouds in different formats.
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Re: Comparitive scans, Leica, Faro, Trimble

Post by HagaeusBygghantverk »

Thank you for your feedback!

The demand for presicion will be different for every project and usecase and as you say too big a subject to be discussed here. My goal is to deliver examples so they can decide wheather the lower price is worth the lower quality or the other way around. The Z+F sounds promising if able to get proper images. None of these have any illumination at all. The RTC360 (have to check up on the Faro) can capture HDR at least. Some Riegl scanners can mount a proper DSLR camera and should be good. Z+F, Riegl and Surphaser would have been lovely to try out, but I haven't found any here during my limited timeframe. The NavVis looks very good with proper cameras and would work fine for this specific building. Do you know how it handles rough terrain? Also a price estimate would be very nice to have. A lot of manufacturers seem afraid to tell what their stuff cost.

My own opinion is that laserscanners are good for geometry, but if you want good textures you have to combine it with photogrammetry. Also if you want to capture the underside and top of all the chairs, cupboards and tables. I have taken 1000 photos of these rooms with a Nikon D800 but am not done processing it yet.

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Re: Comparitive scans, Leica, Faro, Trimble

Post by dhirota »

HagaeusBygghantverk wrote:
Sun May 10, 2020 4:41 pm
Thank you for your feedback!
...
The NavVis looks very good with proper cameras and would work fine for this specific building. Do you know how it handles rough terrain? Also a price estimate would be very nice to have. A lot of manufacturers seem afraid to tell what their stuff cost.
...
The NavVis M6 is a trolley system to be used on indoor and urban outdoor projects. We have used it merged with our Riegl VZ400i and Z+F 5010X in rough steep terrain. If you are planning to purchase and have cash, vendors will give you a price.

Unless the Heritage Board has staff with heritage scanning experience, purchase of a sensor system might not be as efficient as hiring a service provider near the project with the equipment and experience. You might contact the NavVis Partner mentioned in the article below.

05-10-2020 09-17-32 AM.jpg
HagaeusBygghantverk wrote:
Sun May 10, 2020 4:41 pm
...
I have taken 1000 photos of these rooms with a Nikon D800 but am not done processing it yet.
I have seen the results of just taking many photos alone on many projects when thousands of pictures are taken without a method of organizing, classifying, merging exposure and locating the images that may end in a less than productive result. A simple 1,000 sqMeter NavVis M6 scan project in less than an hour, can produce 1,656 individual images, resulting in 275 panorama images, but they are all located within the project space.
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Dennis Hirota, PhD, PE, LPLS
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Re: Comparitive scans, Leica, Faro, Trimble

Post by max72 »

I wonder about the faro settings used. Maybe they were overkill?
We are talking of two small rooms, with my much older faro I would use 1/8 or 1/5 at 2x. The longest acquisition time would be the one of the photos. C2C registration.
I think for a couple of 5x5 rooms that would be more than enough. If something requires a higher detail I would rely on pictures taken by hand, and photogrammetry.
Maybe I misunderstood the project, but something is not fitting.
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Re: Comparitive scans, Leica, Faro, Trimble

Post by HagaeusBygghantverk »

The Faro setting might very well be overkill. I wanted to see what it was capable of. Full resolution was only used on the stoves and for the rest we had to use a medium setting. They avaraged on 7 min per scan. I might find the exact info in the Faro Scene file. Right now my computer is calculating the photogrammetry, so I don't want to load up a 250 million pointcloud at the moment. Just another software to learn as well :)

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