Abstract
Shearlets not only possess all properties that other transforms have, but
also are equipped with a rich mathematical structure similar to wavelets, which are
associated to a multi-resolution analysis. Recently, shearlets have been used in
image denoising, sparse image representation, and edge detection. However, its
application in image fusion is still under study. In this letter, we study the
feasibility of image fusion using shearlets. Fusion rules of larger high-frequency
coefficients based on regional energy, regional variance, and absolute value are
proposed because shearlet transform can catch detailed information in any scale and
any direction. The fusion accuracy is also further improved by a region consistency
check. Several different experiments are adopted to prove that fusion results based
on shearlet transform can acquire better fusion quality than any other method.
© 2011 Chinese Optics Letters
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