Abstract: This paper proposes a modified approach to design of two dimensional windowed all phase image filtering templete，based on the concept of all phase data space，and a design of 2D all phase image filtering templete with window.It is a FIR filter design scheme possessing concurrently the merits of the conventional windowing and the frequency sampling.On taking full account of equivalence condition of circular convolution and linear convolution，in this paper，the authors give the custom design method of the all phase filter.Which insures that the all phase filter to be designed has excellent properties and makes much consistencies with filter prototype that has been proposed ahead.Theoretical analysis and simulation experiment show that it has the advantage of frequency sampling in the overall filter performance，and features its narrow transition bandwidth，high roll-off and deep stopband attenuation，with which to remove effectively block artifact and improve evidently image quality.

摘要： 基于全相位数据空间的概念以及一种二维加窗全相位图像滤波模板的设计，给出了一修正的二维全相位图像卷积滤波模板设计方法。方法在用全相位概念设计滤波模板中充分考虑了用DFT和循环卷积表达线性卷积时的等价性条件，以确保待设计的全相位滤波器的频率响应特性与给定的原型滤波器的频率特性矩阵有更好的相关性和一致性。实验表明，该全相位滤波模板与已有的二维全相位图像滤波模板比较，有过渡带的宽度窄、滚降陡峭，阻带衰减小等特点，可以进一步有效消除方块效应，提高滤波处理后图像的质量。