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Interpolation of Non-Linear Retinex Type Algorithms

Shaked, Doron


Keyword(s): image processing; retinex-type algorithms; image interpolation

Abstract: In this paper we propose a method to speed up Retinex- type algorithms, consisting of a computationally intensive non-linear illumination estimation module followed by a relatively simple manipulation module. Speed up is obtained by way of computing the illumination on a sub-sampled image. The challenge is to interpolate a piece-wise smooth low resolution image. We present and analyze the trade off between two types of interpolation methods. On one hand, regular illumination interpolation, which preserves the Retinex-type output quality, however may result in artifacts. On the other hand a detail preserving interpolation which removes artifacts, however may compromise the output quality. Publication Info: Published in the proceedings of Electronic Imaging 2007, 28 January - 1 February 2007, San Jose, CA, USA

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