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A New Descreening Technique in the Frequency Domain
(The Eurographics Association, 2006)
In this paper a new algorithm to obtain a continuous tone image starting from a halftoned one is proposed. This descreening technique is based on Butterworth filtering in the frequency domain. It removes the pattern of the ...
Color Palette Images Re-indexing by Self Organizing Motor Maps
(The Eurographics Association, 2006)
Palette re-ordering is a well known and very effective approach for improving the compression of color-indexed images. If the spatial distribution of the indexes in the image is smooth, greater compression ratios may be ...