PersistenceImage

Package that provides an implementation to the persistence algorithm proposed in https://dl.acm.org/citation.cfm?id=3122017.

Installation

In order to install the package follow the steps below

using Pkg
Pkg.add("https://github.com/chronchi/PersistenceImage.jl")

Usage

Given a persistence diagram the algorithm will output a persistence image using the function transformdiagram.

a = rand(100)
diagram = [a a.^(2/3)]
persimg = transformdiagram(diagram)

Parameters

There are some parameters described in the paper that you have to choose, namely the grid size and distribution. The current implementation only supports the Gaussian distribution, therefore there is a choice of the standard deviation σ. The grid size is a tuple, namely pixels and is used as below.

a = rand(100)
diagram = [a a.^(2/3)]
σ = 1.0 # standard deviation
pixels = (10, 10) # grid size
persimg = transformdiagram(diagram, pixels=pixels, σ=σ)