@InProceedings{AlvesMasc:1993:PrDiRe,
author = "Alves, Andr{\'e} Hiroshi Hayashi and Mascarenhas, Nelson Delfino
d'{\'A}vila",
affiliation = "{Divis{\~a}o de Processamento de Imagens (DPI) do Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Divis{\~a}o de
Processamento de Imagens (DPI) do Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Probabilistic and dictionary-based relaxation techniques applied
to a statistical method of edge detection",
booktitle = "Anais...",
year = "1993",
editor = "Figueiredo, Luiz Henrique de and Gomes, Jonas de Miranda",
pages = "81--87",
organization = "Simp{\'o}sio Brasileiro de Computa{\c{c}}{\~a}o Gr{\'a}fica e
Processamento de Imagens, 6. (SIBGRAPI)",
publisher = "Sociedade Brasileira de Computa{\c{c}}{\~a}o",
address = "Porto Alegre",
keywords = "relaxation techniques probabilistic, statistical method of edge
detection, Image Processing.",
abstract = "Two relaxation schemes, a probabilistic and a dictionary-based
one, applied to edge detection, are described. The problem of edge
detection is defined using a statistical approach. The solution,
in terms of statistical decision theory, leads to a test among
hypotheses of configurations of sets of four pixels (quadruplets).
The relaxation schemes are also developed using the quadriplets as
labelling objects. The initial probabilities for the label set of
each object are synthesized from the values obtained in the
statistical tests. The interaction neighborhood adopted for the
two methods is the 4-neighborhood. The iterative label probability
updating is performed using a classical heuristic procedure in the
two schemes. Tests using noisy synthetic and real images are
presented. An experimental analysis of convergence to a consistent
and non-ambiguous labelling and speed of convergence is performed
for the two schemes and results are compared. A change in the
dictionary according to a modification in the definition of
consistency is proposed and the resulting scheme is tested and
compared with the two other ones.",
conference-location = "Recife, PE, Brazil",
conference-year = "19-22 Oct. 1993",
isbn = "978-85-7669-271-3",
language = "en",
ibi = "8JMKD3MGPBW34M/3D76B3B",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3D76B3B",
targetfile = "10 Probabilistic and dicionary.pdf",
type = "Processamento de Imagens I",
volume = "1",
urlaccessdate = "2024, May 03"
}