The purpose of Raster Fairy is to transform any kind of 2D point cloud into a regular raster whilst trying to preserve the neighborhood relations that were present in the original cloud. A typical use case is if you have a similarity clustering of images and want to show the images in a regular table structure.
- Python 2.7 (Python 3 is not supported yet)
- numpy > =1.7.1
- scipy - only for coonswarp and rfoptimizer
From the root directory, run:
pip install .
import rasterfairy #xy should be a numpy array with a shape (number of points,2) grid_xy = rasterfairy.transformPointCloud2D(xy) #grid_xy will contain the points in the same order but aligned to a grid
- Add hexagonal circle grid
- Look into further improving splitting process
- Add Python 3 support
As I learned after publishing there is a very similar earlier developed technique called IsoMatch by O. Fried, S. DiVerdi, M. Halber, E. Sizikova and A. Finkelstein. Unfortunately I was not aware of it during my research and their solution works differently, but you might want to check it out and see if it's better suited to your requirements: IsoMatch Codebase
Another related technique is Kernelized Sorting by Novi Quadrianto, Le Song, Alex J. Smola. from 2009 Kernelized Sorting
Kyle McDonald's CloudToGrid project is a Python-based implementation of the Hungarian method.
A note about porting this to other languages