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本文提出了小波变换中线性相位具有任意阶正则性的FIR共轭镜像滤波器的逼近方法，证明用此方法获得的滤波器均方误差最小，并比较了它的幅频特性、能量集中特性、正则性.实验表明，本文得到的滤波器具有很好的综合性能，适于进行数据压缩的应用．
In this paper, we propose an approximation method for FIR conjugate image filters with arbitrary order of linear phase in wavelet transform. The results show that the mean square error of the filter obtained by this method is the smallest, and its amplitude-frequency characteristic, energy concentration characteristic, Regularity.Experiments show that the filter obtained in this paper has a good overall performance, suitable for data compression applications.