how to permute matrix here?
2 views (last 30 days)
Show older comments
Hi.. I have an image 128x128pixels. then it is divided into 8x8 block. so that we get 16 subblocks. each 8x8 block, i would like to permute position(1,1) of matrix 8x8 from one subblock to another subblock with same position (1,1). do you know how to solve this problem? i don't know about permutation here. Thank you
0 Comments
Answers (1)
Image Analyst
on 31 Mar 2013
I don't even know what that means. Can you explain better and give an example? Can you also explain why you want to do this?
Otherwise, the only thing I can suggest is to get the row and column of each pixel in each block that you wish to swap and do the usual swap code:
savedPixelValue = grayImage(row1, column1);
grayImage(row1, column1) = grayImage(row2, column2);
grayImage(row2, column2) = savedPixelValue;
4 Comments
Image Analyst
on 31 Mar 2013
So why can't you adapt my code as follows:
row1 = 1;
column1 = 1;
savedPixelValue = b1(row1, column1);
b1(row1, column1) = b2(row2, column2);
b2(row2, column2) = savedPixelValue;
See Also
Categories
Find more on Data Converters in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!