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Warped distance for space-variant linear image interpolation

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1 Author(s)
Ramponi, G. ; Dipt. di Elettrotecnica Elettronica ed Inf., Trieste Univ., Italy

The problem of image interpolation using linear techniques is dealt with in this paper. Conventional space-invariant methods are revisited and changed into space-variant ones, by introducing the concept of the warped distance among the pixels of an image. A better perceptual rendition of the image details is obtained in this way; this effect is proved both via the evaluation of the response to an idealized sigmoidal edge model and with experiments on real-world images. The computational costs of the proposed approach are very small when compared to those of state-of-the art nonlinear interpolation operators

Published in:

Image Processing, IEEE Transactions on  (Volume:8 ,  Issue: 5 )

Date of Publication:

May 1999

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