Attacks on wavelet domain watermarks

spatial domain attacks


median filtering	stirmark

grayscale/color depth	down-scaling

smoothing	gamma correction

cropping

frequency domain attacks


JPEG

wavelet domain attacks


SPIHT	IW4

EPIC	EPWIC

WaveKit	EZW

JPEG2000

Peter Meerwald, pmeerw@cosy.sbg.ac.at