i split the image pixels into many small matrices

i split the image pixels into many small overlapping matrices

block(:,:,kk+j)=grey_img((i:i+2),(j:j+2))

i want to recombine this overlapping matrices how please help

[Rik]

How do you want to recombine this? Purely based on the variable name I think the blockproc function might be a better choice.

[Rik]

Comment posted as answer by parvatham vijay:

Thank you

how to use blockproc for dividing the 256x256 matrix into 3x3 matrix with overlapping,kindly help

Answer 1

[Rik]

The blockproc function works on distinct blocks. If you want a sliding window operation you need to use a function like nlfilter.

A = imread('cameraman.tif');%load an included 256x256 example image
fun=@(x) max(x(:));
B=nlfilter(A,[3 3],fun);

%show input and output
figure(1),clf(1)%only use clf during debugging
subplot(1,2,1)
imshow(A)
title('original')
subplot(1,2,2)
imshow(B)
title('filtered')

The function can be as complicated as you want it to be.

[Rik]

Comment posted as answer by parvatham vijay:

what is function @(x), i couldn't get idea,pl.explain how to use function

Thank you

[Rik]

See this link.

Answer 2

[parvatham vijay]

i want to create a matrix which contains the numbers from 1 to 256, (3x3 matrix but continiously,)

3 rows and 768 columns.the matrix is a repeated matrix ,here 2nd and third column repeated

then 3rd and 4th column repeated.(1,1 1,2 represents first row ,first column element ;like wise)

1,1 1,2 1,3 1,2 1,3 1,4 1,3 1,4 1,5 ...etc

2,1 2,2 2,3 2,2 2,3 2,4 2,3 2,4 2,5 ....etc

3,1 3,2 3,3 3,2 3,3 3,4 3,3 3,4 3,5 ....etc

i tried this code but i cant get this answer

clear all

close all

a= [1:10];

for i=2:4

j=2:4

a(i,:)=a(i-1,:)+3;

end

this is sample i have taken 1 to 10 numbers

Kindly help

[Rik]

Please stop posting your comments (or questions) as answer. Also, your question is unformatted, making it difficult to understand. Please use the layout tools to make your question more readable.