matlab 将图像切分为N*N像素的小块

将数据数据按照N*N的方格切割，并将图像数据输出。
图像不足的部分全部补为0。
图像以cell单元的方式输出，其排列顺序与原图的排向顺序相同。

function Divided_image = Divide_into_N_block(N)
%Brian%2012-10-06% 
%将数据数据按照N*N的方格切割，并将图像数据输出。
%图像不足的部分全部补为0。
%图像以cell单元的方式输出，其排列顺序与原图的排向顺序相同。
Img = imread('im1.png');
% Img = rgb2gray(Img);
[Img_hang , Img_lie] = size(Img);
Remainder_hang = rem(Img_hang,N);
Remainder_lie = rem(Img_lie,N);
Supplement_hang = N - Remainder_hang;
Supplement_lie = N - Remainder_lie; 

if (Remainder_hang > 0 )
    hang_flag = 0;
else
    hang_flag =1;
end

if (Remainder_lie>0 )
    lie_flag = 0;
else
    lie_flag =1;
end

Divided_image = divide_Image(Img,hang_flag,lie_flag,N,Img_hang,Img_lie,Supplement_hang,Supplement_lie);

end

function Divided_image = divide_Image(Img,hang_flag,lie_flag,N,Img_hang,Img_lie,Supplement_hang,Supplement_lie)
[Img_hang , Img_lie] = size(Img);
Integer_hang = floor(Img_hang/N);
Integer_lie = floor(Img_lie/N);
if (hang_flag== 1 && lie_flag == 1)
    for i = 1 : Integer_hang
        for j = 1 : Integer_lie
            Divided_image(i,j) = {Img((i-1)*N+1 : i*N , (j-1)*N+1 : j * N)};
        end
    end
elseif (hang_flag== 1 && lie_flag == 0)
    Img_insect_hang = zeros(Img_hang,Supplement_lie);
    Img_New_hang = [Img Img_insect_hang];
    for i = 1 : Integer_hang
        for j = 1 : Integer_lie+1
            Divided_image(i,j) = {Img_New_hang((i-1)*N+1 : i*N , (j-1)*N+1 : j * N)};
        end
    end
elseif (hang_flag== 0 && lie_flag == 1)
    Img_insect_lie = zeros(Supplement_hang,Img_lie);
    Img_New_lie = [Img ; Img_insect_lie];        
    for i = 1 : Integer_hang + 1
        for j = 1 : Integer_lie
            Divided_image(i,j) = {Img_New_lie((i-1)*N+1 : i*N , (j-1)*N+1 : j * N)};
        end
    end
elseif (hang_flag== 0 && lie_flag == 0)
    Img_insect_hang = zeros(Img_hang,Supplement_lie);
    Img_New_hang = [Img Img_insect_hang];
    [~,New_lie] = size(Img_New_hang);
    Img_insect_lie = zeros(Supplement_hang,New_lie);
    Img_New = [Img_New_hang ; Img_insect_lie];
    for i = 1 : Integer_hang + 1
        for j = 1 : Integer_lie+1
            Divided_image(i,j) = {Img_New((i-1)*N+1 : i*N , (j-1)*N+1 : j * N)};
        end
    end
end


end

　　调用的话，如果需要将原图像分为5*5像素，即：Divided_image = Divide_into_N_block(5)