Use este identificador para citar ou linkar para este item:
http://www.repositorio.ufop.br/jspui/handle/123456789/1905
Título: | Multi-histogram equalization methods for contrast enhancement and brightness preserving. |
Autor(es): | Menotti, David Najman, Laurent Facon, Jacques Araújo, Arnaldo de Albuquerque |
Palavras-chave: | Constrast enhancement Brightness preserving Histogram equalization Multi-threshold selection |
Data do documento: | 2007 |
Referência: | MENOTTI, D. et al. Multi-histogram equalization methods for contrast enhancement and brightness preserving. IEEE Transactions on Consumer Electronics, v. 53, n. 3, p. 1186-1194, 2007. Disponível em: <http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4341603>. Acesso em: 29 nov. 2012. |
Resumo: | Histogram equalization (HE) has proved to be a simple and effective image contrast enhancement technique. However, it tends to change the mean brightness of the image to the middle level of the gray-level range, which is not desirable in the case of images from consumer electronics products. In the latter case, preserving the input brightness of the image is required to avoid the generation of non-existing artifacts in the output image. To surmount this drawback, Bi- HE methods for brightness preserving and contrast enhancement have been proposed. Although these methods preserve the input brightness on the output image with a significant contrast enhancement, they may produce images with do not look as natural as the input ones. In order to overcome this drawback, this work proposes a novel technique called Multi-HE, which consists of decomposing the input image into several sub-images, and then applying the classical HE process to each one. This methodology performs a less intensive image contrast enhancement, in a way that the output image presents a more natural look. We propose two discrepancy functions for image decomposing, conceiving two new Multi-HE methods. A cost function is also used for automatically deciding in how many sub-images the input image will be decomposed on. Experiments show that our methods preserve more the brightness and produce more natural looking images than the other HE methods. |
URI: | http://www.repositorio.ufop.br/handle/123456789/1905 |
Link para o artigo: | http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4341603 |
ISSN: | 00983063 |
Aparece nas coleções: | DECOM - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
ARTIGO_MultiHistogramEqualization.pdf Restricted Access | 1,31 MB | Adobe PDF | Visualizar/Abrir |
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.