hi..

could plezz any of u run this code.. i dont have matlab now.. but i
really need to run this code now.. i want to know if there is any
error.. u can put any type of image to this code..

thanks..

IM = imread('ray image.jpg');
[p,q] = size(IM);

% create/resize image into 60-by-100
image = imresize(IM,[60 100]);			
figure, imshow(image), title('New Size')

[rows,cols] = size(image);

% create cell array all 0's
submat = zeros(rows,cols);

% divides into 3-by-5 cell array
% each cell array contain 20-by-20 matrix
submat = mat2cell(image,[20 20 20],[20 20 20 20 20]);
[20,20] = size(submat);

for i = 1 : 20 : rows
    for j = 1 : 20 : cols
        submat(i,j) = image(i,j);
         
        disp(submat{i,j})
    end
end

figure,imshow(submat), title('New Submatrices')
submat = zeros(rows,cols);

Hi,

I see that you are still working on your project :

I can't run this one for you because I have any tooolbox.

But I saw some wrong things :

> % create cell array all 0's
> submat = zeros(rows,cols);

That's wrong. It's creating an array not a cell array
I think you should replace submat by mycellarray.
It could be a good start to avoid the confusion that you still make
between both. TO preallocate you cell array try this :

[mycellarray{1:3,1:5}]=deal(zeros(20,20))

this create a 3x5 cell array composed of fifteen 20x20 zeros matrix.

Looking at your code I wonder why don't you use an easier code :

[IM,map,alpha] = imread('essai.jpg','jpg');

figure('Name','Original jpeg image');
imagesc(IM);
axis image
 
[mycellarray{1:3,1:5}] = deal(zeros(20,20));

figure('Name','Broken Image');
k=1;
for i = 1 : 5
    for j = 1 : 3
        
    ind1=(i-1)*20+1:i*20;
    ind2=(j-1)*20+1:j*20;
        
    mycellarray{i,j} = IM(ind1,ind2);
 
    subplot(5,3,k);
    imagesc(mycellarray{i,j});

    k=k+1;
        
    end
end

Your image is broken into sub one contained in a cell array
mycellarray

Hope It Helps
J�r�me.

J�r�me wrote:
>
>
> Hi,
>
> I see that you are still working on your project :
>
> I can't run this one for you because I have any tooolbox.
>
> But I saw some wrong things :
>
>> % create cell array all 0's
>> submat = zeros(rows,cols);
>
> That's wrong. It's creating an array not a cell array
> I think you should replace submat by mycellarray.
> It could be a good start to avoid the confusion that you still make
> between both. TO preallocate you cell array try this :
>
> [mycellarray{1:3,1:5}]=deal(zeros(20,20))
>
> this create a 3x5 cell array composed of fifteen 20x20 zeros
> matrix.
>
> Looking at your code I wonder why don't you use an easier code :
>
> [IM,map,alpha] = imread('essai.jpg','jpg');
>
> figure('Name','Original jpeg image');
> imagesc(IM);
> axis image
>
> [mycellarray{1:3,1:5}] = deal(zeros(20,20));
>
> figure('Name','Broken Image');
> k=1;
> for i = 1 : 5
> for j = 1 : 3
>
> ind1=(i-1)*20+1:i*20;
> ind2=(j-1)*20+1:j*20;
>
> mycellarray{i,j} = IM(ind1,ind2);
>
> subplot(5,3,k);
> imagesc(mycellarray{i,j});
>
> k=k+1;
>
> end
> end
>
> Your image is broken into sub one contained in a cell array
> mycellarray
>
> Hope It Helps
> J�r�me.

hi

thanks jerome..
i'll try to run ur code later.. at home..
bye..

julie

julie wrote:
>
>
> J�r�me wrote:
>>
>>
>> Hi,
>>
>> I see that you are still working on your project :
>>
>> I can't run this one for you because I have any tooolbox.
>>
>> But I saw some wrong things :
>>
>>> % create cell array all 0's
>>> submat = zeros(rows,cols);
>>
>> That's wrong. It's creating an array not a cell array
>> I think you should replace submat by mycellarray.
>> It could be a good start to avoid the confusion that you still
> make
>> between both. TO preallocate you cell array try this :
>>
>> [mycellarray{1:3,1:5}]=deal(zeros(20,20))
>>
>> this create a 3x5 cell array composed of fifteen 20x20 zeros
>> matrix.
>>
>> Looking at your code I wonder why don't you use an easier code
:
>>
>> [IM,map,alpha] = imread('essai.jpg','jpg');
>>
>> figure('Name','Original jpeg image');
>> imagesc(IM);
>> axis image
>>
>> [mycellarray{1:3,1:5}] = deal(zeros(20,20));
>>
>> figure('Name','Broken Image');
>> k=1;
>> for i = 1 : 5
>> for j = 1 : 3
>>
>> ind1=(i-1)*20+1:i*20;
>> ind2=(j-1)*20+1:j*20;
>>
>> mycellarray{i,j} = IM(ind1,ind2);
>>
>> subplot(5,3,k);
>> imagesc(mycellarray{i,j});
>>
>> k=k+1;
>>
>> end
>> end
>>
>> Your image is broken into sub one contained in a cell array
>> mycellarray
>>
>> Hope It Helps
>> J�r�me.

hi..

i've run ur code.. but i'm still not really sure about some functions
in that code.. after i compiled it, image has been broken into 15
cell array size 20x20.. but not in the grayscale type.. should i put
colormap gray

subplot(5,3,k);
imagesc(mycellarray{i,j});
colormap gray;
k = k+1;

one more thing, i'm not understand this statement..

ind1=(i-1)*20+1:i*20;
ind2=(j-1)*20+1:j*20;

thanks 4 ur help.. and i'm still working on the same project using
mat2cell.

thanks
julie

Hi,

just add "colormap gray" after the figure creation. Because it is
applied to figure, you don't have to set it for each subplot.

The indices ind1 & ind2 are just indices of your IM matrix.

ind1 corresponds to the rows indice of IM, ind2 to its columns
indices

i=1 => ind1= 1 to 20 (IM rows 1 to 20)
i=2 => ind1= 21 to 40 (IM rows 21 to 40)
....
i=5 => ind1= 21 to 40 (IM rows 81 to 100)

j=1 => ind2= 1 to 20 (IM columns 1 to 20)
....
j=3 => ind2= 41 to 60 (IM columns 41 to 60)

so each time the code takes a 20x20 elements of IM.

J�r�me.