Relative Coordinate Encoder

[rhyolight]

I would not say deprecated, but you have more options. There has been lots of work on this recently, check these out!

Grid Cell Encoder

Hi all, The community fork now includes an encoder which converts 2-D coordinates into plausible grid cell module activity: [Grid_Cell_Receptive_Fields] To generate pictures like this one, call: python3 -m nupic.encoders.grid_cell_encoder See also the help message: python3 -m nupic.encoders.grid_cell_encoder --help

Grid Cell Inspired Scalar Encoder

After several days of thinking about grid cells and localization (still trying to grok a plausible mechanism that would give rise to the observed grid cell behavior), I finally made a somewhat related connection back to the encoders that I thought I would run by the HTM community. While considering the 1D example of grid cell behavior in @rhyolight’s HTM School video, I came up with a simple scalar encoder that I believe has some rather nice properties and is also fairly simple to implement. Th…

Path anomoly detection using Grid Cells and Temporal Memory

I’m surprised that no one has ever tried grid cells as location encoders (like to the old GeoSpatial Encoder) for anomaly detection. So it became an experiment I ran for the final project for my ML course. Here is a screen shot for your viewing pleasure. And letting me to explain things more clearly. [image] On the left you see a white and red circle revolving in a circle. That is the target. HTM will try to learn lt’s path and generate anomaly signals when even the path is altered. On the …