A spectral graph wiener filter in graph fourier domain for improved image denoising
Özet
A Wiener filtering scheme in graph Fourier domain is proposed for improving image denoising performance achieved by various spectral graph based denoising methods. The proposed Wiener filter is estimated by using graph Fourier coefficients of the noisy image after they are processed for denoising, to further improve the already achieved denoising accuracy as a post-processing step. It can be estimated from and applied to the entire image, or can be used patchwise in a locally adaptive manner. Our results indicate that the proposed step yields consistent accuracy improvement for different choices of weighted adjacency and graph Laplacian matrices used in computing the graph Fourier transform and for different processing methods used to denoise obtained transform coefficients. We obtain higher peak signal-to-noise ratio values than the BM3D method for some images
Kaynak
2016 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2016 - ProceedingsKoleksiyonlar
- Bildiri Koleksiyonu [355]
- Scopus İndeksli Yayınlar Koleksiyonu [8325]
İlgili Öğeler
Başlık, yazar, küratör ve konuya göre gösterilen ilgili öğeler.
-
GAME CHROMATIC NUMBER OF (WnP2)-P-center dot center dot
Akcan, Ummahan; Akyar, Emrah; Akyar, Handan (Editura Bibliotheca-Bibliotheca Publ House, 2016)In this paper we find an exact value for the game chromatic number of the Cartesian product graph (WnP2)-P-center dot center dot of two graphs, n-wheel W-n and the path graph P-2. This extends a previous work of Sia on the ... -
Taguchi Tasarımının Uygulanması ve Klasik Kesirli Çoketkenli Tasarımla Karşılaştırılması
Dervişoğlu, Nurten; Muluk, F.Zehra (Anadolu Üniversitesi, 2007)Cevap değişkenine etki eden etkenlerin ve düzeylerinin çok olduğu deneyleri tasarlamak ve etki tahminlerini kolaylıkla elde edebilmek için çeşitli yöntemler geliştirilmiştir. Bu yöntemler, tüm deneme kombinasyonlarının yer ... -
A spectral graph based image coding method [Spektral Çizge Tabanli Bir Görüntü Kodlama Yöntemi]
Yağan, Ali Cart; Özgen, Melanaet Tonkin (Institute of Electrical and Electronics Engineers Inc., 2017)In this paper, a spectral graph based image coding method is proposed. In the proposed method, only the smoothing parameter in the graph adjacency matrix, graph Fourier transform (GFT) coefficients kept after hard thresholding ...