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Fast Parallel Approach for 2-D DHT-Based Real-Valued Discrete Gabor Transform

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2 Author(s)
Liang Tao ; MOE Key Lab. of Intell. Comput. & Signal Process., Anhui Univ., Hefei, China ; Hon Keung Kwan

Two-dimensional fast Gabor transform algorithms are useful for real-time applications due to the high computational complexity of the traditional 2-D complex-valued discrete Gabor transform (CDGT). This paper presents two block time-recursive algorithms for 2-D DHT-based real-valued discrete Gabor transform (RDGT) and its inverse transform and develops a fast parallel approach for the implementation of the two algorithms. The computational complexity of the proposed parallel approach is analyzed and compared with that of the existing 2-D CDGT algorithms. The results indicate that the proposed parallel approach is attractive for real time image processing.

Published in:

IEEE Transactions on Image Processing  (Volume:18 ,  Issue: 12 )