Image scaling with aliasing cancellation

Alan Tõnisson; Andrew Dorrell; Nagita Mehrseresht; Richard Zillman

doi:10.1117/12.872284

24 January 2011 Image scaling with aliasing cancellation

Alan Tõnisson, Andrew Dorrell, Nagita Mehrseresht, Richard Zillman

Proceedings Volume 7876, Digital Photography VII; 78760J (2011) https://doi.org/10.1117/12.872284
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States

Abstract

This paper describes a novel image scaling algorithm based on a simple orientation adaptive anti-aliasing filter. The Projection-Slice theorem of Fourier theory is applied to characterize the structure of aliasing errors along edges in scaled images. This structure is used to explain the operation of our anti-aliasing filter which removes the dominant Fourier component of the aliasing error. It is shown that edge detail may be recovered from an aliased image by applying the anti-aliasing filter to the output of a separable wide-band interpolating filter. We also describe a simple one-dimensional inverse filter that may be combined with our anti-aliasing filter to restore further detail. Comparison of our scaling algorithm with other methods demonstrates that our scaling method is generally superior to other methods in removing visible aliasing artifacts along edges. Our method also competes favorably with state-of-the-art methods in recovering edge detail, without introducing sharpening artifacts exhibited by other methods.

Citation Download Citation

Alan Tõnisson, Andrew Dorrell, Nagita Mehrseresht, and Richard Zillman "Image scaling with aliasing cancellation", Proc. SPIE 7876, Digital Photography VII, 78760J (24 January 2011); https://doi.org/10.1117/12.872284

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