Title
Real-time hyperspectral processing for automatic nonferrous material sorting
Abstract
The application of hyperspectral sensors in the development of machine vision solutions has become increasingly popular as the spectral characteristics of the imaged materials are better modeled in the hyperspectral domain than in the standard trichromatic red, green, blue data. While there is no doubt that the availability of detailed spectral information is opportune as it opens the possibility to construct robust image descriptors, it also raises a substantial challenge when this high-dimensional data is used in the development of real-time machine vision systems. To alleviate the computational demand, often decorrelation techniques are commonly applied prior to feature extraction. While this approach has reduced to some extent the size of the spectral descriptor, data decorrelation alone proved insufficient in attaining real-time classification. This fact is particularly apparent when pixel-wise image descriptors are not sufficiently robust to model the spectral characteristics of the imaged materials, a case when the spatial information (or textural properties) also has to be included in the classification process. The integration of spectral and spatial information entails a substantial computational cost, and as a result the prospects of real-time operation for the developed machine vision system are compromised. To answer this requirement, in this paper we have reengineered the approach behind the integration of the spectral and spatial information in the material classification process to allow the real-time sorting of the nonferrous fractions that are contained in the waste of electric and electronic equipment scrap. (c) 2012 SPIE and IS&T. [DOI: 10.1117/1.JEI.21.1.013018]
Year
DOI
Venue
2012
10.1117/1.JEI.21.1.013018
JOURNAL OF ELECTRONIC IMAGING
Field
DocType
Volume
Spatial analysis,Computer vision,Material classification,Decorrelation,Machine vision,Pattern recognition,Computer science,Feature extraction,Hyperspectral imaging,Sorting,Artificial intelligence,Electronic equipment
Journal
21
Issue
ISSN
Citations 
1
1017-9909
1
PageRank 
References 
Authors
0.38
15
6
Name
Order
Citations
PageRank
Artzai Picón112110.60
Ovidiu Ghita223418.12
Aranzazu Bereciartua310.38
Jone Echazarra410.38
Paul F. Whelan556139.95
Pedro M. Iriondo6364.69