OpenStreetMap
OpenStreetCam sign detection code and training data open sourced
於 16 五月 2018 由 mvexel 以English發表。 上一次更新時間為21 五月 2018。Telenav created and hosts OpenStreetCam, as many of you know. OpenStreetCam now has well over 130 million images contributed in large part by OSM mappers (thanks!). We already integrate the images themselves with JOSM and iD.
About a year ago, we started an internal initiative to apply machine learning to detect important features such as signs that are captured in the images. While we haven’t rolled that out at scale yet, you can already see the results in some US metro areas such as Salt Lake City, Detroit and Dallas / Fort Worth, using the latest version of the OpenStreetCam JOSM plugin. The goal is to make mapping sign content much easier and quicker. You can, for example, filter speed detected speed limit signs to see only the ones where the way in OSM does not have this speed limit yet.
So far, the technology behind this has been internal to Telenav. This is changing today.
Starting today, you can see, download, and contribute to the source code that powers our sign detections from Github. In addition, we’re releasing a training set and a test set of 45000 images manually annotated by our map team with more than 55000 signs in 23 different classes such as: traffic signals, stop signs, speed limits and turn restrictions. You can use these data sets to run your own detection improvements. Perhaps you want to detect benches? Bus stops? Storefronts? Be our guest ☺️ We are happy to add your improvements to the OpenStreetCam platform if they are useful to OSM.
We are also running a competition to celebrate this open source release. If you think you have what it takes to improve our existing detections meaningfully, I encourage you to enter! The competition runs until August 17. There is a $10,000 prize for the winner!
Finally: we do not have any plans to automatically add any of this detected information to OSM. Any improvements will always be made manually by mappers through the existing JOSM plugin, iD integration (coming) and MapRoulette.
If you’re interested, there was also an official press release announcing this.
討論
由pizzaiolo於2018年5月16日14:22發表的評論
When is the Android app going to drop proprietary dependencies, though? That’s the only thing stopping me from using either OSC or Mapillary at the moment.
由mvexel於2018年5月16日16:01發表的評論
The Android app is open source pizzaiolo, have you looked into submitting a pull request? It’s on the team radar I know, but just haven’t been able to make it a priority.
由ImreSamu於2018年5月16日16:29發表的評論
This repo ? https://github.com/Telenav/Telenav.AI
由mvexel於2018年5月16日17:02發表的評論
Yes, thanks for adding that, edited the post with the link.
由mvexel於2018年5月16日17:08發表的評論
Also, interestingly, someone on hacker news pointed out that the example image highlights a sign for an exit speed limit, not the main road speed limit :) This to prove the point that this kind of technology a) needs improvement, so it can only benefit from being open source and b) the results will need the crucial human mapper eye to be useful for OSM.
由philippec於2018年5月16日17:47發表的評論
I wait for a better smartphone to contribute.
由Baloo Uriza於2018年5月16日18:55發表的評論
So, I got a Waylens Horizon, now how do I use it for OSC?
由RafalR於2018年5月18日11:17發表的評論
When will the OpenStreetCam map show the places where the photos were taken in a correct way?
由Carnildo於2018年5月19日01:40發表的評論
Not only is the sign an exit speed limit, it’s the yellow of an advisory speed limit rather than the white of a mandatory speed limit.
由Baloo Uriza於2018年5月19日02:54發表的評論
Nice catch, Carnildo. “Speed limit” isn’t even the correct verbiage for those yellow signs, they’re Advisory Speeds in the US and Canada, and don’t have the force of law, just guidance of what the DOT can send a sedan around without passengers feeling uncomfortable.