bitrotate

버전 1.0.0.0 (2.14 KB) 작성자: Kenneth Eaton
Performs a circular shift of bit values

다운로드 수: 588

업데이트 날짜: 2011/3/8

라이선스 보기

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);
end;
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:

http://blogs.mathworks.com/steve/2006/10/17/the-story-behind-the-matlab-default-image/

인용 양식

Kenneth Eaton (2022). bitrotate (https://www.mathworks.com/matlabcentral/fileexchange/30679-bitrotate), MATLAB Central File Exchange. 검색됨 .

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