Program matlab sharpening citra

function sharpening

A=imread('cameraman.tif');

%m=[0 -1 0;-1 4 -1;0 -1 0];

%m=[1/10 1/10 1/10;1/10 1/5 1/10;1/10 1/10 1/10];

m=[-1 -1 -1;-1 9 -1;-1 -1 -1];

A=double(A);

d=A;

[baris kolom]=size(A);

for i=2:baris-1;

    for j=2:kolom-1;

        d(i,j)=A(i-1,j-1)*m(1,1)+A(i-1,j)*m(1,2)+A(i-1,j+1)*m(1,3)+A(i,j-1)*m(2,1)+A(i,j)*m(2,2)+A(i,j+1)*m(2,3)+A(i+1,j-1)*m(3,1)+A(i+1,j)*m(3,2)+A(i+1,j+1)*m(3,3);

        if d(i,j)>255

            d(i,j)=255;

        else if d(i,j)

                d(i,j)=0;

            end

        end

    end

end

C=uint8(A);

subplot (2,2,1), imshow(C);

subplot (2,2,2), imhist(C);

D=uint8(d)

subplot (2,2,3), imshow(D);

subplot (2,2,4), imhist(D);