nearest.m

[matlab] DIP nearest neighbor interpolation and bilinear interploation

function nearest(img,a)
A=double(img);
B=zeros(a.*size(A));
[br_size,bc_size]=size(B);

for i=1:br_size
    for j=1:bc_size
        x=round(i/a);
        y=round(j/a);
        if x==0
            x=1;
        end
        if y==0
            y=1;
        end
        B(i,j)=A(x,y);
    end 
end

imshow(uint8(B));
size(A)
size(B)
imwrite(uint8(B),'d:\pic\result.jpg','jpg');