Matlab影像處理(四)影像濾波

 %% 平均濾波 中值濾波

close all; clear; clc;

img = double(rgb2gray(imread('A.jpg')));

[row, col] = size(img(:, :, 1));

avgimg = zeros(row, col); medimg = zeros(row, col);

count=0; A=0; s=zeros(1, 9);

for i=1:row-2

    for j=1:col-2

        for ii=1:3

            for jj=1:3

                count = count + 1;

                A = A + img(i+ii-1, j+jj-1);

                s(1, count) = img(i+ii-1, j+jj-1);

            end

        end

        avgimg(i+1, j+1) = A./count;

        count=0; A=0;

        s = sort(s);

        medimg(i+1, j+1) = s(1, 5);

        s = zeros(1, 9);

    end

end

subplot(1, 3, 1), imshow(uint8(img)), title('原圖')

subplot(1, 3, 2), imshow(uint8(avgimg)), title('平均濾波')

subplot(1, 3, 3), imshow(uint8(medimg)), title('中值濾波')