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Title:
THREE-DIMENSIONAL FEATURE REGION EXTRACTION METHOD
Document Type and Number:
Japanese Patent JP3892750
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a three-dimensional feature region extraction method that can shortly extract a three-dimensional feature region by reducing cycles of convergence calculations.
SOLUTION: A three-dimensional active grid with a three-dimensional grid structure is used for extraction of a three-dimensional feature region from three-dimensional volume data defined as data handleable in a three-dimensional virtual space. A convergence calculation based on an energy minimization principle determines positions where internal energy for contracting the three- dimensional active grid and image energy for converting the contraction at a three-dimensional feature region balance with each other to thereby extract the three-dimensional feature region. As the three-dimensional grid structure, a quadratic surface grid structure enabling fewer cycles of convergence calculations than a hexahedral grid structure is used.


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Inventors:
Akio Doi
Application Number:
JP2002111398A
Publication Date:
March 14, 2007
Filing Date:
April 12, 2002
Export Citation:
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Assignee:
Japan Science and Technology Agency
International Classes:
G06F17/50; G06T7/60; (IPC1-7): G06T7/60; G06F17/50; G06T17/40
Domestic Patent References:
JP7184877A
JP5197785A
Attorney, Agent or Firm:
西浦 ▲嗣▼晴



 
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