Scale Object Selection (SOS) through a hierarchical segmentation by a multi-spectral per-pixel classification - Archive ouverte HAL Access content directly
Journal Articles Pattern Recognition Letters Year : 2014

Scale Object Selection (SOS) through a hierarchical segmentation by a multi-spectral per-pixel classification

Abstract

In high resolution multispectral optical data, the spatial detail of the images are generally smaller than the dimensions of objects, and often the spectral signature of pixels is not directly representative of classes we are interested in. Thus, taking into account the relations between groups of pixels becomes increasingly important, making object­oriented approaches preferable. In this work several scales of detail within an image are considered through a hierarchical segmentation approach, while the spectral information content of each pixel is accounted for by a per­pixel classification. The selection of the most suitable spatial scale for each class is obtained by merging the hierarchical segmentation and the per­pixel classification through the Scale Object Selection (SOS) algorithm. The SOS algorithm starts processing data from the highest level of the hierarchical segmentation, which has the least amount of spatial detail, down to the last segmentation map. At each segmentation level, objects are assigned to a specific class whenever the percentage of pixels belonging to the latter, according to a pixel­based procedure, exceeds a predefined threshold, thereby automatically selecting the most appropriate spatial scale for the classification of each object. We apply our method to multispectral, panchromatic and pan­sharpened QuickBird images.
Fichier principal
Vignette du fichier
SOS_Chini_et_al.pdf (9.96 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01065938 , version 1 (18-09-2014)

Identifiers

Cite

Marco Chini, Alessandro Chiancone, Salvatore Stramondo. Scale Object Selection (SOS) through a hierarchical segmentation by a multi-spectral per-pixel classification. Pattern Recognition Letters, 2014, 49, pp.214-223. ⟨10.1016/j.patrec.2014.07.012⟩. ⟨hal-01065938⟩
437 View
151 Download

Altmetric

Share

Gmail Facebook X LinkedIn More