1D all-phase digital processing method has been applied in such fields as spectrum analysis

adaptive processing

template design and filter bank analysis synthesis.However

the progress of researches on 2D all-phase is so slow that there are no implementation methods yet.Due to the above

this paper firstly analyzes the 2D all-phase signal processing mode to deduce out 2D all-phase filter with convolution windows;Secondly

the implementation structure of 2D all-phase processing is given and thealgorithm is optimized as well.Thirdly

2 important characteristics of 2D all-phase filter are discussed;finally

3D transmission curves are drawn out based on MATLAB.Summarizedly

this paper completes designing 2D all-phase digital filter theoretically

implementation method and experimental verification.