Computing the moment of two - dimensional images using straightforward algorithm needs lots of additions and multiplications . however , operation speed is crucial in many applications , especially in real - time pattern recognition applications . so it is necessary to investigate fast algorithms for reducing computation complexity 用直接方法求取二維圖像的矩值需要計(jì)算大量的加法和乘法,而運(yùn)算速度在許多應(yīng)用(尤其是實(shí)時(shí)模式識(shí)別)中是非常關(guān)鍵的,因而有必要研究減少計(jì)算復(fù)雜度的矩快速算法。