A Closed-Form Solution to Retinex with Nonlocal Texture Constraints.
IEEE Trans Pattern Anal Mach Intell
; 34(7): 1437-44, 2012 Jul.
Article
em En
| MEDLINE
| ID: mdl-22450820
ABSTRACT
We propose a method for intrinsic image decomposition based on retinex theory and texture analysis. While most previous methods approach this problem by analyzing local gradient properties, our technique additionally identifies distant pixels with the same reflectance through texture analysis, and uses these nonlocal reflectance constraints to significantly reduce ambiguity in decomposition. We formulate the decomposition problem as the minimization of a quadratic function which incorporates both the retinex constraint and our nonlocal texture constraint. This optimization can be solved in closed form with the standard conjugate gradient algorithm. Extensive experimentation with comparisons to previous techniques validate our method in terms of both decomposition accuracy and runtime efficiency.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
IEEE Trans Pattern Anal Mach Intell
Ano de publicação:
2012
Tipo de documento:
Article