Provided that the image is uint8 or uint16 or int16, but not double:
Lsb = mod(TheImage, 2);
Now for any given row R and column C
Lsb(R, C, :)
will be the least significant bit of each of the bit planes.
TheImage - Lsb + NewLsb
would then set the least significant bit to be NewLsb
There are times when it makes sense to convert to grayscale before looking at Lsb, but there are other times when it should be left as rgb. In particular if you are doing watermark work then you need to keep the cover as rgb.
