title: Spectral-spatial classification of hyperspectral data based on a stochastic minimum spanning forest approach.
abstract: In this paper, a new method for supervised hyperspectral data classification is proposed. In particular, the notion of stochastic minimum spanning forest (MSF) is introduced. For a given hyperspectral image, a pixelwise classification is first performed. From this classification map,   M marker maps are generated by randomly selecting pixels and labeling them as markers for the construction of MSFs. The next step consists in building an MSF from each of the   M marker maps. Finally, all the  M realizations are aggregated with a maximum vote decision rule in order to build the final classification map. The proposed method is tested on three different data sets of hyperspectral airborne images with different resolutions and contexts. The influences of the number of markers and of the number of realizations  M on the results are investigated in experiments. The performance of the proposed method is compared to several classification techniques (both pixelwise and spectral-spatial) using standard quantitative criteria and visual qualitative evaluation.
authors.affiliation: University of Iceland, Reykjavik, Iceland.
authors.forename: Kévin
authors.initials: K
authors.lastname: Bernard
authors.forename: Yuliya
authors.initials: Y
authors.lastname: Tarabalka
authors.forename: Jesús
authors.initials: J
authors.lastname: Angulo
authors.forename: Jocelyn
authors.initials: J
authors.lastname: Chanussot
authors.forename: Jón Atli
authors.initials: JA
authors.lastname: Benediktsson
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008029:Lighting / Q000379:methods*; D015233:Models, Statistical; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013269:Stochastic Processes