IEEE Trans Image Process - Fast image upsampling via the displacement field.

Tópicos

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Resumo

In this paper, we present a fast image upsampling method within a two-scale framework to ensure the sharp construction of upsampled image for both large-scale edges and small-scale structures. In our approach, the low-frequency image is recovered via a novel sharpness preserving interpolation technique based on a well-constructed displacement field, which is estimated by a cross-resolution sharpness preserving model. Within this model, the distances of pixels on edges are preserved, which enables the recovery of sharp edges in the high-resolution result. Likewise, local high-frequency structures are reconstructed via a sharpness preserving reconstruction algorithm. Extensive experiments show that our method outperforms current state-of-the-art approaches, based on quantitative and qualitative evaluations, as well as perceptual evaluation by a user study. Moreover, our approach is very fast so as to be practical for real applications.

Resumo Limpo

paper present fast imag upsampl method within twoscal framework ensur sharp construct upsampl imag largescal edg smallscal structur approach lowfrequ imag recov via novel sharp preserv interpol techniqu base wellconstruct displac field estim crossresolut sharp preserv model within model distanc pixel edg preserv enabl recoveri sharp edg highresolut result likewis local highfrequ structur reconstruct via sharp preserv reconstruct algorithm extens experi show method outperform current stateoftheart approach base quantit qualit evalu well perceptu evalu user studi moreov approach fast practic real applic

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