Image interpolation based on median-type filters

Bing Zeng; Anastasios N. Venetsanopoulos

doi:10.1117/1.601771

1 September 1998 Image interpolation based on median-type filters

Bing Zeng, Anastasios N. Venetsanopoulos

Optical Engineering, Vol. 37, Issue 9, (September 1998). https://doi.org/10.1117/1.601771

Image interpolation based on median-type filters is investigated. We study this problem for two decimation schemes that are most commonly used in practice: (1) quincunx lattice and (2) rectangular lattice. For each decimation lattice, we propose a number of interpolation structures that are based on some median or finite impulse response (FIR)-median hybrid filters. Extensive simulations show that the proposed median-based interpolators outperform significantly as compared with linear schemes. To further verify the effectiveness of these medianbased interpolators, we compare them with multilayer neural networks designed through a training process, and still show a preference for the median-based interpolators. As an application, they are used in an interpolative Joint Photographic Experts Group (JPEG) coding scheme to suppress blocking artifacts at very low bit rates.

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Bing Zeng and Anastasios N. Venetsanopoulos "Image interpolation based on median-type filters," Optical Engineering 37(9), (1 September 1998). https://doi.org/10.1117/1.601771

Published: 1 September 1998

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