Abstract
Polar harmonic transforms (PHTs) are superior to Zernike moments and Pseudo-Zernike moments in terms of higher speed and numerical stability. Despite all these advantages, there is still a need for fast computing algorithms for real-world applications. So far, the approaches used in boosting the computational speed of PHTs include recursive relation and symmetric/anti-symmetric properties of kernel functions. Taking advantage of these two approaches, a new class of computational framework has been presented to compute the kernel functions with a minimal number of arithmetic operations. The proposed computational framework reduces the number of additions/subtractions from 56 to 24 and the number of multiplications from 12 to 8 compared to existing fast methods. The experimental results show that the proposed method is around 1.4 times faster than that of the existing fastest algorithm.
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Singh, S.P., Urooj, S. A New Computational Framework for Fast Computation of a Class of Polar Harmonic Transforms. J Sign Process Syst 91, 915–922 (2019). https://doi.org/10.1007/s11265-018-1417-0
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DOI: https://doi.org/10.1007/s11265-018-1417-0