Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A review of EO image information mining   We analyze the state of the art of content-based retrieval in Earth
observation image archives focusing on complete systems showing promise for
operational implementation. The different paradigms at the basis of the main
system families are introduced. The approaches taken are analyzed, focusing in
particular on the phases after primitive feature extraction. The solutions
envisaged for the issues related to feature simplification and synthesis,
indexing, semantic labeling are reviewed. The methodologies for query
specification and execution are analyzed.

12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc