Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New similarity index based on entropy and group theory   In this work, we propose a new similarity index for images considering the
entropy function and group theory. This index considers an algebraic group of
images, it is defined by an inner law that provides a novel approach for the
subtraction of images. Through an equivalence relationship in the field of
images, we prove the existence of the quotient group, on which the new
similarity index is defined. We also present the main properties of the new
index, and the immediate application thereof as a stopping criterion of the
"Mean Shift Iterative Algorithm".

22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg