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Autori: Galić, Irena; Weickert, Joachim; Welk, Martin; Bruhn, Andrés; Belyaev, Alexander; Seidel, Hans-Peter
Naslov: Towards PDE-based image compression
Izvornik: Proceedings of the Third International Workshop on Variational, Geometric, and Level Set Methods in Computer Vision : VLSM 2005 / Paragios, Nikolas ; Faugeras, Olivier ; Chan, Tony ; Schnörr Christoph (ur.). - Berlin : Springer , 2005. 37-48 (ISBN: 978-3-540-29348-4).
Skup: International Workshop on Variational, Geometric, and Level Set Methods in Computer Vision (3 ; 2005)
Mjesto i datum: Peking, Kina, 16.10.2005.
Ključne riječi: partial differential equations; nonlinear diffusion; image compression; image inpainting
Sažetak:
While methods based on partial differential equations (PDEs) and variational techniques are powerful tools for denoising and inpainting digital images, their use for image compression was mainly focussing on pre- or postprocessing so far. In our paper we investigate their potential within the decoding step. We start with the observation that edge-enhancing diffusion (EED), an anisotropic nonlinear diffusion filter with a diffusion tensor, is well-suited for scattered data interpolation: Even when the interpolation data are very sparse, good results are obtained that respect discontinuities and satisfy a maximum– minimum principle. This property is exploited in our studies on PDE-based image compression.We use an adaptive triangulation method based on B-tree coding for removing less significant pixels from the image. The remaining points serve as scattered interpolation data for the EED process. They can be coded in a compact and elegant way that reflects the B-tree structure. Our experiments illustrate that for high compression rates and non-textured images, this PDE-based approach gives visually better results than the widely-used JPEG coding.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Računarstvo
URL Internet adrese: http:///books.google.hr/books?id=MnaN3_SN7XUC&printsec=frontcover&dq=ISBN978-3-540-29348-4&source=gbs_summary_r&cad=0#PPA37,M1
Upisao u CROSBI: irena@etfos.hr (irena@etfos.hr), 28. Lis. 2008. u 12:37 sati
Napomene:
Lecture Notes in Computer Science (ISSN 0302-9743) Vol. 3752



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