Color image of house for visual perception&#58; &#40;a&#41; original image&#44; &#40;b&#41; image with Gaussian noise &#963;&#61;25&#44; &#40;c&#41; Gaussian smoothing filter&#44; &#40;d&#41; AFD filter&#44; &#40;e&#41; AFI filter&#44; &#40;f&#41; proposed FDZP 2D filter&#46;