Apparatus and method for steganalysis
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United States of America Patent
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Aug 24, 2010
Grant Date -
Jun 18, 2009
app pub date -
Feb 23, 2009
filing date -
Jan 26, 2005
priority date (Note) -
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Abstract
An apparatus and method for steganalysis that enhances the ability to detect distortion introduced by data hiding. In embodiments of the invention, a pixel grayscale value in an image is predicted by using its neighboring grayscale values of neighboring pixels. Further, a prediction-error image is produced by subtracting the image from its predicted image. The prediction-error image may is employed to remove at least some variations in image data other than those associated with data hiding an thus, at least partially offsets variations from image aspects other than data hiding.
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