'Micro-GPS' that can acquire location information in units of several millimeters is developed
GPS is used to acquire location information for smartphones, automobiles, drones, etc., but there are problems such as 'it is difficult to acquire location information indoors' and 'it is difficult to acquire location information in units of several millimeters'.
High-Precision Localization Using Ground Texture
https://arxiv.org/abs/1710.10687
Micro-GPS
https://microgps.cs.princeton.edu/
Micro-GPS can recognize position information in units of several millimeters based on the pattern data on the ground. The following movie explains how Micro-GPS works.
Micro-GPS ICRA2019 --YouTube
In large warehouses such as Amazon's warehouse , robots are used for purposes such as picking luggage. These robots use a two-dimensional code placed on the ground to recognize their position.
The newly developed Micro-GPS is a system that recognizes the position by reading scratches and marks on the ground.
Micro-GPS takes a high-definition picture of the ground in the area covered by the camera and spreads the picture to create a database of the ground in the entire area.
Micro-GPS is compatible with the ground of various materials such as wood, carpet, tile, concrete and asphalt.
For example, at first glance, a carpet looks like a repeating simple pattern ...
When magnified, there are subtle differences in color and spacing, and it has a unique pattern depending on the position, just like a fingerprint.
The same is true for asphalt ...
There are unique patterns depending on the location, such as cracks and dirt, which can be used as location information identifiers.
The difference in pattern can be used for coarse-grained asphalt as well.
When scratches and cracks are used to identify location information, the pattern may change over time, but the research team's verification allows location information to be identified even 16 days after the initial database construction. It was.
In the case of concrete ground, it was identifiable even after 26 days.
Cameras that take pictures of the ground do not have to be that high-performance. For example, even if the ground of the tile
With Micro-GPS, you can identify location information even if the pattern on the ground changes a little. For example, after building a carpet database, you can easily identify location information by scratching the carpet by hand.
However, when a large number of leaves fall on the concrete, it becomes impossible to identify the location information.
The research team is appealing that Micro-GPS can accurately and quickly detect reliable location information both indoors and outdoors with an accuracy of a few millimeters. You can also see the ground dataset that was actually used to develop Micro-GPS on the
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