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Photonic quasi-crystals are ordered but not periodic structures that lack translational symmetry but include rotational symmetry. The present work apply index gradient concept to the familiar inhomogeneous index forms, Maxwell fish eye, Luneburg lens, and Eaton lens for aiming enhanced…

The use of quaternion data can provide benefit in applications like robotics and image recognition, and particularly for performing transforms in 3-D space. Here, we describe a kernel adaptive algorithm for quaternions. A least mean square (LMS)-based method was used,…

The method of incorporating information from multiple images into a single image to get enhanced imaging quality and reduce randomness and redundancy in medical images for diagnosis and assessment of medical problems. In this paper, we present a new technique…