|
HI, all, i amBODY bgColor=#ffffff> now in research in RST attack in digital
watermarking. as to most methods, they refer the RST,merely mean the attacks
don't include croping, that is the image size changes when rotating ,and as to
transaltion, they also mean just transalte in a background, without cropping.
but as to the image, it seems no meaning. another RST is include croping
attacks, which can't be represented by the linear equation [ x y]=[s 0;0
s]*[cosa -sina;sina cosa][x' y']+[a b]ĄŁ can anyone tell me some useful method to
deal with the second RST types? the Invariant domain based on moments are all
related with no cropping.
|
