HIGH CAPACITY,LOSSLESS,SECURE IMAGE STEGANOGRAPHY USING WAVELETS

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IMAGE STEGANOGRAPHY

Steganography means – “COVERED WRITING”.

It’s a concealed communication

Image steganography is the technique hiding a payload (message) is hided
inside cover image (carrier),to get a stego-image.

Cover image is not statistically changed.

The modern example of steganography is a microdot.


DRAWBACKS….


Drawbacks some of the commonly used transforms:

FOURIER TRANSFORM-applicable to only stationary signals. No time-frequency representations.

SHORT TIME FOURIER TRANSFORM :
it is applicable to non stationary signals, there is time–freq. representation, but the resolution is poor.