DC-QIMDistortion-Compensated Quantization Index Modulation
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References in periodicals archive ?
As can be seen from Figure 3 both variants of the proposed method perform better than DC-QIM for WNR values less than -2 dB and, obviously, much higher capacity provided by DC-QIM-IDL is compared to the other methods in that range.
The other two methods whose performance is quite close to NS-QIM are DC-QIM and FZDH.
According to the plots in Figure 5, the performance of NS-QIM in general is very close to that of DC-QIM but is slightly worse for low Q factor.
It has been demonstrated that for some popular types of attack the performance of NS-QIM is comparable or better than that of DC-QIM. The mentioned DC-QIM is considered to be one of the best quantization methods for watermarking, but it is extremely vulnerable to GA.
For all the mentioned in the experimental section methods (QIM, DC-QIM, RDA, FZDH, TCM, and the proposed methods) the results were collected under equal conditions of each kind of attack.