Towards PDE-based image compression (CROSBI ID 542760)
Prilog sa skupa u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Galić, Irena ; Weickert, Joachim ; Welk, Martin ; Bruhn, Andrés ; Belyaev, Alexander ; Seidel, Hans-Peter
engleski
Towards PDE-based image compression
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.
partial differential equations ; nonlinear diffusion ; image compression ; image inpainting
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Podaci o prilogu
37-48.
2005.
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objavljeno
978-3-540-29348-4
10.1007/11567646_4
Podaci o matičnoj publikaciji
Lecture notes in computer science
Paragios, N. ; Faugeras, O. ; Chan, T. ; Schnörr C.
Berlin: Springer
0302-9743
1611-3349
Podaci o skupu
International Workshop "Variational, Geometric, and Level Set Methods in Computer Vision" (3 ; 2005)
poster
16.10.2005-16.10.2005
Peking, Kina