1 April 1992 An edge-restricted spatial interpolation algorithm
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J. of Electronic Imaging, 1(2), (1992). doi:10.1117/12.55185
Abstract
This study addresses how to generate high spatial resolution image data from a low spatial resolution imaging source. An edge-restricted spatial interpolation algorithm is developed to increase the image resolution and at the same time to enhance the sharp edges and details from the original imaging source. The algorithm is based on a cubic spline-under-tension interpolation kernel. The weights of the interpolation kernel can be adjusted adaptively according to the edge information in the neighborhood of the interpolated pixels. The algorithm can be applied to a relatively low spatial resolution image source, such as video, to generate high-resolution image data for high-quality printing devices.
Kefu Xue, Ann Winans, Eric Walowit, "An edge-restricted spatial interpolation algorithm," Journal of Electronic Imaging 1(2), (1 April 1992). http://dx.doi.org/10.1117/12.55185
JOURNAL ARTICLE
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KEYWORDS
Convolution

Image filtering

Spatial resolution

Algorithm development

Image enhancement

Optical filters

Video

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