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Denser 3D Point Clouds in OpenSfM

blog.mapillary.com

21–30 of 37 posts

Re: Denser 3D Point Clouds in OpenSfM

#21

Is it possible to use images from say Google Street View to reconstruct 3D city model with this tool? Maybe it could fall into fair use for small part of city...

You'll want to use the OpenStreetView dataset for that, which has a much more liberal license for collected images than Mapillary. (OSV is a direct competitor to Mapillary, with OSV being sponsored by Navteq)

http://openstreetview.com/terms/

You might also consider mining Flickr by geotag, constraining to CC licenses that allow for use.

Re: Denser 3D Point Clouds in OpenSfM

#22

Is it possible to use images from say Google Street View to reconstruct 3D city model with this tool? Maybe it could fall into fair use for small part of city...

Thanks for the very informative and detailed answers. The Google TOS seems very restrictive, and I can't quite stomach the idea that our data, including photo of my house, is free to use by big companies in any way conceivable, but on the other hand, a small, maybe scientific purpose, is in violation of TOS :(

Re: Denser 3D Point Clouds in OpenSfM

#23

Is it possible to use images from say Google Street View to reconstruct 3D city model with this tool? Maybe it could fall into fair use for small part of city...

You'll want to use the OpenStreetView dataset for that, which has a much more liberal license for collected images than Mapillary. (OSV is a direct competitor to Mapillary, with OSV being sponsored by Navteq) http://openstreetview.com/terms/ You might also consider mining Flickr by geotag, constraining to CC licenses that allow for use.

Or even just directly capture geotagged photos. That's going to be the best way to ensure good coverage of the target area.

Re: Denser 3D Point Clouds in OpenSfM

#24

Earlier quoted context omitted.

You'll want to use the OpenStreetView dataset for that, which has a much more liberal license for collected images than Mapillary. (OSV is a direct competitor to Mapillary, with OSV being sponsored by Navteq) http://openstreetview.com/terms/ You might also consider mining Flickr by geotag, constraining to CC licenses that allow for use.

Or even just directly capture geotagged photos. That's going to be the best way to ensure good coverage of the target area.

What would the capture source be if not an existing online repository?

Re: Denser 3D Point Clouds in OpenSfM

#25

Earlier quoted context omitted.

Or even just directly capture geotagged photos. That's going to be the best way to ensure good coverage of the target area.

What would the capture source be if not an existing online repository?

A camera.

That's where Mapillary and OSV get their imagery from, people that decide to go out and take pictures.

An additional advantage is that you then have full rights to the imagery (so for example, you can upload them to both services).

Re: Denser 3D Point Clouds in OpenSfM

#26

Is it possible to use images from say Google Street View to reconstruct 3D city model with this tool? Maybe it could fall into fair use for small part of city...

Thanks for the very informative and detailed answers. The Google TOS seems very restrictive, and I can't quite stomach the idea that our data, including photo of my house, is free to use by big companies in any way conceivable, but on the other hand, a small, maybe scientific purpose, is in violation of TOS :(

Photos of a house from the public street isn't your data though. This is why you are empowered to go and collect all sorts of data and information that is exposed to the public in all sorts of ways, and do with it as you please.

You have just as much right to take pictures of Google's complexes from public locations and bill them should they want to use what you have collected, and this whole situation is really a good thing. Things in the public domain are in the public domain.

Re: Denser 3D Point Clouds in OpenSfM

#27

How well would this work in a situation with artificial (moving) lighting? I have seen reconstructions for wrecks underwater, and we are interested in doing something similar.

It is possible to correct for all sorts of different lighting conditions. See here: http://grail.cs.washington.edu/projects/timelapse/

Re: Denser 3D Point Clouds in OpenSfM

#28

Earlier quoted context omitted.

What would the capture source be if not an existing online repository?

A camera. That's where Mapillary and OSV get their imagery from, people that decide to go out and take pictures. An additional advantage is that you then have full rights to the imagery (so for example, you can upload them to both services).

That'd work of course! Bit more of a schlep to build out your processing pipeline to ingest those images, store them, and then render them with OpenSfM, but could definitely be done.

Re: Denser 3D Point Clouds in OpenSfM

#29

Earlier quoted context omitted.

Thanks for the very informative and detailed answers. The Google TOS seems very restrictive, and I can't quite stomach the idea that our data, including photo of my house, is free to use by big companies in any way conceivable, but on the other hand, a small, maybe scientific purpose, is in violation of TOS :(

Photos of a house from the public street isn't your data though. This is why you are empowered to go and collect all sorts of data and information that is exposed to the public in all sorts of ways, and do with it as you please. You have just as much right to take pictures of Google's complexes from public locations and bill them should they want to use what you have collected, and this whole situation is really a go…

You are right. But on some level I don't like that huge disbalance of power, where on one hand you can take a photo with your smartphone, but someone can take a fleet of vehicles and run them 24/7 around globe, photographing everything, making hi res lidar images, georeferencing, coupling that with smartphone data, etc. I would be more OK with it, if it was open dataset though. End of rant :)

Re: Denser 3D Point Clouds in OpenSfM

#30
post #6

Never heard of OpenSfM before but have been looking for something like it.

I have personal and professional projects that involve mundane data feeding and service-building around this core capability. This totally fills a niche that's been on my tech radar for a while.
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