Using ReCap Photo/Photogrammetry for modelling an entire building

[Anonymous]

Hello!

I'm gonna create a BIM out of photo's from my smartphone using Autodesk products as my Masters Thesis. I'm thinking about using Recap photo for creating the 3D model out of photo's and then using Revit for BIM creation. 

I'm wondering how to approach this using Recap photo. How do I create 3D models of rooms and combine this with the exterior of the house? And is this even possible? Do you have any suggestion for how to create a BIM from photo's using Autodesk products? How "accurate" is it possible to get this model? 

Thanks for any answers!

[karthik.nathan · Accepted solution]

Hi @Anonymous,

Thank you for your question. There are a few limitations and constraints in photogrammetry that apply especially when capturing rooms and interiors. Windows, mirrors, shiny  & other transparent surfaces will not be captured well, and will likely affect the quality of the overall reconstruction. Also if the room is empty with just single color walls and furniture (i.e. the room lacks color and texture), stitching of the photographs will not be accurate or may fail completely.

If none of these limitations apply to the rooms you want to capture, then this image might be of help to capture interiors and facades:

Also, here's a link to a longer video on best photo taking practices for photogrammetry: https://knowledge.autodesk.com/support/recap/learn-explore/caas/sfdcarticles/sfdcarticles/Taking-the-right-pictures-for-use-in-Autodesk-ReCap-Photo-video.html

For creating a Revit model from the reconstructed interior, you will have to do it manually for now, possibly by tracing over the reconstructed point cloud.

Combining interior and exterior captures will be likely also be a manual process unless there is a decent amount of overlap between the captures. You can transform and scale one mesh relative to the other in most software like Maya or MeshMixer.

As for accuracy, the quickest and best method to capture interiors is laser scanning. The completeness and accuracy of a laser scan will be better suited for interiors than photogrammetry.

Hopefully this information has been useful. Good luck!

-Karthik

[anil_mistry]

Hi @Anonymous,

I'm just checking in to see if you need more help with this. Did the suggestion that @karthik.nathan provided work for you?

If so, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

[anil_mistry]

Hi @Anonymous,

I am checking back to see if one of the great posts in this thread helped you with your question. If so, please take a moment to reward the poster or posters with a Kudos and select the Accept as Solution button on those posts that helped.

Thank you and have a great day!

[Anonymous]

It worked so far, I'm gonna test this so I might have some more questions later. 

Thank you for the answer!

[anil_mistry]

Hi @Anonymous,

Thank you for your reply. Please, let us know if you have any other questions or concerns.

Thank you and have a great day!

[philsogood]

@karthik.nathanhi,

can you, please, give me another link(this one is dead) for photogrammetry best practices?

thanks

Phil

[florian.scheidler]

UAV best practices:

https://help.autodesk.com/view/RECAP/ENU/?guid=RealityCapture_Photo_UAV_UAS_Drone_Best_Practices_htm...

Autodesk Recap Photo - How to take the right photos

https://www.youtube.com/watch?v=-F-mBJQcthE

[philsogood]

thanks