[IPOL announce] new article: Watervoxels

[announcements about the IPOL journal]

A new article is available in IPOL: http://www.ipol.im/pub/art/2019/250/

Pierre Cettour-Janet, Clément Cazorla, Vaia Machairas, Quentin Delannoy, 
Nathalie Bednarek, François Rousseau, Etienne Décencière, and Nicolas 
Passat,
Watervoxels,
Image Processing On Line, 9 (2019), pp. 317–328.
https://doi.org/10.5201/ipol.2019.250


Abstract

In this article, we present the n-dimensional version of the 
waterpixels, namely the watervoxels. Waterpixels constitute a simple, 
yet efficient alternative to standard superpixel paradigms, initially 
developed in the field of computer vision for reducing the space cost of 
input images without altering the accuracy of further image 
processing/analysis procedures. Waterpixels were initially proposed in a 
2-dimensional version. Their extension to 3-dimensions -and more 
generally n-dimensions- is however possible, in particular in the 
Cartesian grid. Indeed, waterpixels mainly rely on a seeded watershed 
transformation applied on a saliency map defined as the linear 
combination of a gradient map and a distance map. We propose a 
description of the algorithmics of watervoxels in n-dimensional 
Cartesian grids. We also discuss its parameters and its time cost. A 
source code for 2- and 3-dimensional versions of watervoxels is 
provided, such as a 2-dimensional demonstrator. This article can be seen 
as the companion of the article 'Waterpixels', published in 2015 in IEEE 
Transactions on Image Processing.