how to take union of images?

i rotate an image a of size 150*150 from 0 to 90 degrees. I wanted to take the union of all images rotated and then calculate mean and max of the union images... how to do that.... please do reply...

 for j = 0:90
    rROI = imresize(ROI, [150 150]);
    a = imrotate(rROI,j);
 end

is it possible to display mean and max of that image also....

[Image Analyst]

What is your definition of "union"? Do you mean the average? A bitwise OR operation?

[Image Analyst]

The link says "elysicoc's images are not publicly available.".

[Elysi Cochin]

o sorry.. sir... atry this link

http://tinypic.com/view.php?pic=2r5dh4y&s=8#.UyKQZs6CxDB

[Walter Roberson]

Still how do you define "union" for this purpose?

Answer 1

[Youssef Khmou]

union is not clear yet, but try this way :

a Sample :

 X=imread('circuit.tif');
 ROI=X(1:100,1:100);

 F1=rot90(ROI,1);
 F2=rot90(ROI,2);
 F3=rot90(ROI,3);

You have the rotated parts, for easy calculus ROI is considered square, you can now compte the mean (F1+F2+F3)/3 or the variance or the std.....