1 September 1998 Image interpolation based on median-type filters
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Optical Engineering, 37(9), (1998). doi:10.1117/1.601771
Abstract
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.
Bing Zeng, Anastasios N. Venetsanopoulos, "Image interpolation based on median-type filters," Optical Engineering 37(9), (1 September 1998). http://dx.doi.org/10.1117/1.601771
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KEYWORDS
Linear filtering

Digital filtering

Image compression

Image filtering

Nonlinear filtering

Image interpolation

Optical filters

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