Adaptive Watermarking Scheme Using Biased Shift of Quantization Index

Figure 3

Various examples of extracted watermarks: (a) original watermark, the extracted watermark with error ratio of (b) 1.5%, (c) 5.6%, (d) 10.7%, and (e) 14.2%.

(a)

(b)

(c)

(d)

(e)