Median filter on gray image

I need to write a code for this median filter on gray image for 3 x 3, 5 x 5, 9 x 9 pixels size in matlab...Please help me with this.

Answer 1

[Image Analyst]

From the help:

B = medfilt2(A, [m n]) performs median filtering of the matrix A in two dimensions. Each output pixel contains the median value in the m-by-n neighborhood around the corresponding pixel in the input image. medfilt2 pads the image with 0s on the edges, so the median values for the points within [m n]/2 of the edges might appear distorted.

Of course, needless to say, a and b take on the values 3, 5, and 9. Let me know if you can't figure it out.

[QuestionsAccount]

please explian it further like what's the values for A.. B m or n. to apply 5×5 median filter on gray image

[Image Analyst]

A is the image variable, a 2-D matrix. B is the filtered version of A. m is the number of rows in the small scanning filter window, and n is the number of columns in the filter window that slides across the input image A.