RTC Budapest 2015 -this time as a speaker

RTC Europe (Revit Technology Conference) is an annual educational and networking event for BIM users worldwide. This is the place to be for top notch sessions, sharing of knowledge and catching up on the latest trends within digital tools. I have been to every RTC event since it started here in Europa and this time Budapest was the luck city to host this event.

This year, I was not only a delegate at the RTC Europe in Budapest, but I was also a speaker. Together with  Margarida Barbosa from Beck group we delivered a session on «Using Photogrammetric Surveys at Architectural Offices» where we explained the potential of using photogrammetry in the daily workflow.

By combining the eminent knowledge Margarida has on this subject, with my experience from work, we delivered a 75 min session for «all levels». It was a joyful experience and we were super proud to be rated no. 5 top speaker at the conference. To see the entire top ten list, check out the blog posted by Jose Fandos.

Do not hesitate to contact us if you have any questions related to this subject. We are happy to share our discoveries.

See also the review by Jack White, BIMcrunch Editorial – RTC Europe 2015 Review

 

See you in Portugal next year!

 

Advertisements

I have a video but all I want is a beautiful 3D model

Instead of taking multiple photos of an object to create a 3D model, you should consider capturing video of the object instead. As we all know, a video consists of multiple frames that are stacked together and the frame rate is somewhere between 24 and 30. So basically you can just extract the frames from the video and use these frames to create a 3D model by using photogrammetry.

This is one way you can do it:

  • open your video in Photoshop
  • press the «Render Video» button in your «timeline» tab
  • select the «Photoshop Image Sequence» and be sure you have maximum quality for the JPG´s
  • if you are going to use Memento, you can not exceed 250 photos. I usually divide 250 with the duration of the video in seconds. In this way, I will not extract more than 250 frames
  • hit the «Render» button and wait

You have now approximately 250 photos waiting for you to import into Memento and then it is just to wait for the processing to be completed.

Voilà!

PS! I have all my personal videos stored in «Google Photos». Have Google ever considered starting making 3D model effects from these videos by using photogrammetry, or are they just waiting for «Google Tango» to make the first dance…?

Case study #3 Part C: The final result

It seems like a decade since I wrote my first post about the modular facade:

But now the facade has been be fabricated, transported and mounted, and it is time to judge the final results.

Let us start with the construction phase. I am not found of surprises and that is why I detailed the facade down to the nuts and bolts. I was concerned that the manufacturer was not able to deliver good solution for important detail/concepts and therefor I wanted to be proactive. The result was that there were no bad surprises making the modules or when mounting them to the building.

And frankly, I am quite happy with the facade. I like how the facade reflects the light on the aluminium cladding, and the champagne color is playing well with the surrounding buildings. And keep in mind it is not an expensive facade, but together with the manufacturer we have found good solutions that we have discussed thoroughly.

Combining Google Maps, photogrammetry and pointcloud into Revit

I guess I have a hang up on photogrammetry lately. But I enjoy the way you can move data quickly in an effortless operation.

Google Maps is getting better and better, and to be honest I am really amazed how you can view an entire city in great detail. We use Google Maps in our office to investigate exciting sites and surroundings, and I have thought that it would have been valuable to import this information into Revit.

And guess what, by using photogrammetry I made it happen:)

In short:

  • open google maps in full screen and find your building site
  • rotate the view around your site meanwhile you press «print screen» as often as you wish
  • with dropbox installed, the «print screens» should be perfectly downloaded automatically
  • you should crop your photos to get rid of unwanted text/labels. You can do this by making an «action» in Photoshop and then choose «File» – «Scripts» – «Image Processor» to crop every photos in a folder
  • then you make a mesh in Memento with your cropped photos and export it in RCP
  • import it into Revit and enjoy

PS! For fun, I also tried to do photogrammetry with Google Streetview. It was not successful but I will try again later. I do have some ideas:)

Zoo and Amusement Park excursion

The last five years, my family have been visiting «Kristiansand Zoo and Amusement Park» in the summer holiday. It is a great park that has a lot to offer to children in different ages, and we usually stay there for two full days.
Even I get the great feeling of being young again. I relive my own experience when I visited the park as a kid, and it is great to be childish together with my son on a pirate ship and shout «yo ho».

There is of course a stress factor involved. You have two children to look after, ice cream in one hand, camera in the other, a lot of people running and walking, and you are trying to meet the expectation of the children.
But even then, you want to capture this moment, the feeling of joy and anticipation. And for decades we have captured this moment with photos and videos, and we post it on different social mediums. And before this existed, we placed the photos in a family album. But what if we could push it to a new level. Could I manage to tell a story of my experience in a different way?

Well, the result was somewhat successful regarding the time and limitation I had taking the photos. No, I did not bring a drone to capture photos from the skies:) Nor did I have the privilege to stroll around in my desired speed. But hey! I got some decent results from some of the places we visit during our stay in the park. I only wished I could have captured my great kids as well but have you ever tried to ask your kids to stand still in five minutes in a amusement park… 🙂

Please visit my Sketchfab page to see the results: https://sketchfab.com/models/4aa1037f567345cd92ae126a7729ac97

Or take a look at this video:

My experience with the Trimble DPI-8

Remember that this is written by an architect. An architect that is not interested in reading technical manuals, or do to many preparations. So this is not a review. It is more a list of thoughts:)

DSC_0131

Trimble DPI-8

I have tested the Trimble DPI-8 scanner for 24 hours now, and it is time to make a summary of my experience. But first of all, what kind of scanner is the DPI-8? The scanner is an handheld scanner that weight about a kilo so it is just light enough to be held with one hand. The other hand can easily operate the touchscreen when you are configuring the scan. The touchscreen is in fact a pad that runs on Android, and on the back of the pad there is attached to a scanner and a camera. They are connected to the pad with an micro USB cable. It seems fairly well built, but at the same time it is just basic components that is connected together. Why not? And why should you be interested in this scanner?

As an architect, I sometimes get comments from the entrepreneurs that I should be more on the construction site to see how it is actually being built. And there is nothing more I want to do, but the construction time is so cramped and I have to prioritize my time very carefully. In addition when I ask for surveys for my detaildrawings, they do not manage to survey them in time before my deadline. Yes we are talking about the importance of collaborating together in a multidisciplinary BIM model, with the benefits of clash detection etc. But there is little talk about how to gather information during construction time.

lost

Sometimes you are a bit lost…

Here is where we can improve by using new techniques of building data capture, with more efficient collaboration processes. That is why I see a lot of potential in the DPI-8. It is not perfect, and in many ways it feels like the first generation of this type of scanner, but it gives an great insight in how the future of handheld/robot scanning should be. And I am looking forward seeing all the technology that is pushing in this direction, with Google tango and Intel pushing each other.

track@

…but usually you are on track

Okay. The DPI-8 is intuitive. The software is an app and it is pretty straight forward. I did not miss any functionality during my limited test period and the software seemed rather stable. Regarding the scanning, there was a steep learning curve but not in a frustrating way. The information that is displayed on the screen during the scan is constantly giving you feedback how you should proceed scanning, and what area you have scanned so far. If it is displays as green you have a good scan of that area, and if it is yellow you have a medium good scan.  And the best part is actually that you can study your scan immediately after the scan is done on the pad. This way, you can see if you have a successful scan before you leave the construction site.

1etg

Point cloud in Recap based on four DPI-8 scans

The software offers different export formats and during my test period, I ended up exporting to PTS and imported this to Recap. I tried to import it directly to Revit, but while indexing the point cloud, it failed halfway. Other remarks in a randomly order:

  • scanning and exporting drains the battery. Make sure it is fully charged
  • since the memory is (too) small during scanning, you have to «divide» your scans. The is an option called «append» that let you use the same origo as the previous scan. It works surprisingly well.
  • It is a little bit confusing the difference between «scene», «session» and «export»
  • this scanner do not work in strong daylight
  • go slooowly. Or else you will «loose track»
  • when transferring files from the pad, to the PC be careful! I experienced multiple severe windows crashes
  • when scanning mirrors, you can get some funny results
  • read more about the accuracy of the scanner on Trimble webpage. I have not compared it to my results yet.

Yes I have used the scanner only one long day and night… But finally I could play with a gadget that actually made sense. I had great fun testing the scanners limits and I am wondering if this scanner should be a standard equipment for an architect firm? Maybe for architect firms that do a lot of refurbishment? The future is exciting and I am looking forward seeing the construction site being scanned live and continuously with robots or fixed scanners in every room.

They are becoming cheap and I want one!

PS! Special thanks to Geomatikk Survey who let me test the DPI-8, and to Margarida Jerónimo Barbosa who gave me valuable feedback on my post

Update 05.07.2015: The scanner is owned by the Norwegian University of Life Sciences for research purpose but have been sponsored by Geomatikk Survey