i've an image of of size 210x240.in the following code i've made one block..but i want many blocks how can i do it?

clc;

close all;

I=imread('images1.jpeg');

whos I;

fun = @(block_struct) ...

std2(block_struct.data) * ones(size(block_struct.data));

block=blockproc(I,[8 8],fun);

imshow(block);

i want to divide input image into overlapping blocks of size let say 8x8 like Block1,Block2 and so on ... on the basis of intensity as parameter and after that i want to sort these blocks in the form of list..

 can u help me how can i do it? plz provide the required code for it so that i can understand it....

[Raman]

can anybody help me

[Jan]

You find a lot of threads concerning dividing images to blocks in this forum already. Please take the time to read them. Asking for code based on the vague explanation "sort these blocks in form of a list" is most likely not successful: Creating code is very time-consuming, when it requires to guess, what you want.

[Image Analyst]

Your blockproc does not "overlap" the blocks - they're adjacent. So it essentially "tiles" the image and the tiles are not overlapping. Do you want an overlap? If so, you need to use the 'BorderSize' option in blockproc().

[Raman]

i include the bordersize in it...

plz tell me how can i make blocks like block 1, block 2,block3 and so on....from the above blockproc()....

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Raman]

sir i m confused...can u provide the code plz so that

fun = @(block_struct) ...

std2(block_struct.data) * ones(size(block_struct.data));

block=blockproc(I,[6 6],fun,'BorderSize',[3 3]);

can be made in the form of blocks B1,B2,....

here I is an image of size 321x400

[Walter Roberson]

What would you do with the over 4500 individual B variables if you had them? Are you planning to code all 4500+ different variable names into your code? And it's going to be obvious to the reader of the code what variable B138 means, and it is going to be obvious that B108 is not in the same row as B107 ?? Please reconsider using individual variable names.

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Raman]

sir actually i m working on copy move forgery...i need blocks because after sorting the duplicate regions are adjacent in the sorted list...thats y m asking...yet the block size is also not fixed to 6x6...m trying which block size is better for doing all this.. loop concept i understand but

how to make a loop on

block=blockproc(I,[6 6],fun,'BorderSize',[3 3]);

m not getting this.

plz sir can u make a loop on block=blockproc(I,[6 6],fun,'BorderSize',[3 3]); so that i can understand...

[Image Analyst]

See my answer to angel: http://www.mathworks.com/matlabcentral/answers/63118#comment_129150

Answer 1

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/60198-how-to-partition-an-image

[Raman]

thank u sir