Estimation of Color Images by Box Splines from Their Observation through Honeycomb Color Filter

Tomoko YOKOKAWA  Masaru KAMADA  Yasuhiro OHTAKI  Tatsuhiro YONEKURA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E89-A   No.12   pp.3678-3684
Publication Date: 2006/12/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e89-a.12.3678
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Digital Signal Processing
box splines,  consistent sampling,  B-splines,  

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An experimental test has been done on the suitability of box splines for the estimation of color images from their observation through the honeycomb color filter. The estimation is made by following the framework of consistent sampling by Unser and Aldroubi. Numerical evaluation of the estimation errors has shown that the best estimation may be made by choosing the box splines which are twice locally averaged along each of the three axes consisting of the unilateral triangular mesh. A close look at estimated images has indicated that those box splines are almost free from directional jaggy noises that the traditional B-splines suffer from.