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Signs in Images Blurred out #27
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This is a hard problem and we are continuously working on improving the detection algorithms. Sorry I can't give you a more specific answer. I will leave this open so others can report their cases as well. |
@martijnv-telenav yes, this is a difficult problem. A lot of things look like a face or a license plate, which I presume are the two primary things you are trying to blur. Perhaps you could maintain a copy of the original image on your servers and allow the user to selectively "un-blur" parts of an image. |
This is definitely important. Almost all signs on my photos are blurred. E.g. http://openstreetview.org/details/10984/86 and http://openstreetview.org/details/10984/73 |
I used horatiu's images along I-40 to add a speed limit sign. The whole series of images has false positives on signs and parts of the desert along the way. The most problematic blurs are the two images on a standard green US information sign. The first image is completely useless after the blurs. The second image escapes the blurs but by then the image shows the sign mostly cut off. The kicker is the image of the semi trailer. There is not a single blur. Just as with Mapillary, OSV is less than it could be with all this blurring that goes on. If I want to use Mapillary as it is, then I have saturate an area with images so that I can find enough detail about all four numbers in an address. If this is too hard to do, then please don't blur the images. |
http://www.openstreetview.org/details/1159/1951 |
I tried using OpenStreetCam images for mapping today, but blurs like in https://openstreetcam.org/details/9294/786 makes them practically useless. At least with Mapillary I can request that such images are unblurred. |
Saw several like this, and it makes me question the value/importance of intentionally blurring anything if obscured signs is the result. IANAL, but this does make one wonder about expectations when traveling on public streets. https://storage9.openstreetcam.org/files/photo/2018/12/14/proc/1314347_6c258_1481.jpg Even blurred a business name: http://storage9.openstreetcam.org/files/photo/2018/12/14/proc/1314347_6c258_1424.jpg Blurred street name seems particularly bad/frustrating: https://storage9.openstreetcam.org/files/photo/2018/12/14/proc/1314551_3dc4f_118.jpg |
Even just the option to unblur our own imagery would be good. |
A new blurring mechanism is currently under development. |
Another Example: |
Here is some blurring inside signs which have a valid detections!
And some other signs which are blurred, and not detected: |
See the area circled in red in the image below:
![image](https://cloud.githubusercontent.com/assets/15094680/17222439/7a7f8d72-54b5-11e6-9acb-37963abfad9f.png)
Although we can still see that it is a stop sign, it would be nice to be able to read the name of the road on the sign above it.
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