File Exchange

image thumbnail


version 1.0 (2.14 KB) by

Performs a circular shift of bit values



View License

BITROTATE is a version of the built-in BITSHIFT that performs a circular shift of the bit pattern instead of discarding bits that overflow. Type "help bitrotate" at the command prompt to get a complete description of how to use BITROTATE.

As a cool example, I used BITROTATE to successively shift each bit of the default image data into the highest bit position to show the additional image data hidden within. The sample image above was created as follows:

defImage = pow2(get(0,'DefaultImageCData'),47);
imgCell = repmat({zeros(size(defImage))},8,7);
for shift = 0:52
imgCell{shift+1} = bitrotate(defImage,shift);
allImages = cell2mat(imgCell.');
imshow(allImages,[min(allImages(:)) max(allImages(:))]);

You could do the same thing using BITSHIFT instead of BITROTATE, but I just thought it would be a neat illustration. You can check out the full story about this image on Steve's blog:

Comments and Ratings (1)


Amruta (view profile)

how to optimise code for array to find rotation invariant lbp

MATLAB Release
MATLAB 7.11 (R2010b)
Tags Add Tags

Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.

» Watch video