High-precision Fast Computation of Legendre Moments Based on Image Block Strategy
Maozi Chen · Journal of Chinese Computer Systems · 2011
In order to decreasing the computational time and avoiding numerical approximation which is involved in Legendre orthogonal moments,a new algorithm for high-precision and fast computation of Legendre moments on gray scale images is presented.A maximum image block first representation strategy(MBF) is proposed which is used to extract blocks of all intensity values.After extracting the blocks,the image can be redefined and computed using integral formula in terms of blocks of different intensities.The experimental results show that,as compared with the existing fast Legendre moment methods,the proposed method reduces the computational complexity of Legendre moments and has the high precision.