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Journal of Electronic Imaging

Nearest-neighbor and bilinear resampling factor estimation to detect blockiness or blurriness of an image
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Paper Abstract

In digital publishing, a low-resolution image is highly undesirable. Inexperienced users often try to include low-resolution images from the Internet or digital cameras in documents they are composing. Current preflight tools are able to single them out, but what if those low-resolution images have been interpolated? They may have a sufficient resolution, but their quality has been compromised, especially images interpolated by nearest-neighbor (which includes pixel replication) and bilinear interpolation. The interpolated images often display blocky artifacts, blurry artifacts, or loss of texture. We outline novel nearest-neighbor and bilinear interpolation detection algorithms that are designed to estimate rational resampling factors (above 1×) in both the vertical and horizontal dimensions. The robustness of these algorithms to several common postprocessing algorithms is also evaluated.

Paper Details

Date Published: 1 April 2008
PDF: 16 pages
J. Electron. Imag. 17(2) 023005 doi: 10.1117/1.2912053
Published in: Journal of Electronic Imaging Volume 17, Issue 2
Show Author Affiliations
Ariawan Suwendi, Xerox Corp. (United States)
Jan P. Allebach, Purdue Univ. (United States)

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