Abstract
A
new secure image transmission technique is proposed, which transforms automatically
a given large-volume secret image into a so-called secret-fragment-visible
mosaic image of the same size. The mosaic image, which looks similar to an arbitrarily
selected target image and may be used as a camouflage of the secret image, is
yielded by dividing the secret image into fragments and transforming their color
characteristics to be those of the corresponding blocks of the target image.
Skillful techniques are designed to conduct the color transformation process so
that the secret image may be recovered nearly losslessly. A scheme of handling
the overflows/underflows in the converted pixels’ color values by recording the
color differences in the untransformed color space is also proposed. The information
required for recovering the secret image is embedded into the created mosaic
image by a lossless data hiding scheme using a key. Good experimental results
show the feasibility of the proposed method.
Domain : Image Processing
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