DeepAI AI Chat
Log In Sign Up

The VOISE Algorithm: a Versatile Tool for Automatic Segmentation of Astronomical Images

by   P. Guio, et al.

The auroras on Jupiter and Saturn can be studied with a high sensitivity and resolution by the Hubble Space Telescope (HST) ultraviolet (UV) and far-ultraviolet (FUV) Space Telescope spectrograph (STIS) and Advanced Camera for Surveys (ACS) instruments. We present results of automatic detection and segmentation of Jupiter's auroral emissions as observed by HST ACS instrument with VOronoi Image SEgmentation (VOISE). VOISE is a dynamic algorithm for partitioning the underlying pixel grid of an image into regions according to a prescribed homogeneity criterion. The algorithm consists of an iterative procedure that dynamically constructs a tessellation of the image plane based on a Voronoi Diagram, until the intensity of the underlying image within each region is classified as homogeneous. The computed tessellations allow the extraction of quantitative information about the auroral features such as mean intensity, latitudinal and longitudinal extents and length scales. These outputs thus represent a more automated and objective method of characterising auroral emissions than manual inspection.


page 5

page 6

page 8


Segmentation hiérarchique faiblement supervisée

Image segmentation is the process of partitioning an image into a set of...

Prior-based Hierarchical Segmentation Highlighting Structures of Interest

Image segmentation is the process of partitioning an image into a set of...

Automatic Image Segmentation by Dynamic Region Merging

This paper addresses the automatic image segmentation problem in a regio...

Automated Detection of Regions of Interest for Brain Perfusion MR Images

Images with abnormal brain anatomy produce problems for automatic segmen...

A Locally Adapting Technique for Boundary Detection using Image Segmentation

Rapid growth in the field of quantitative digital image analysis is pavi...

LISA: a MATLAB package for Longitudinal Image Sequence Analysis

Large sequences of images (or movies) can now be obtained on an unpreced...