Details

Autor(en) / Beteiligte

• Li, Jian Tao
• Lin, Zhen Xian
• Li, Yuan Sheng

Titel

An Improved QIM Watermarking Algorithm

Ist Teil von

• Applied Mechanics and Materials, 2014-09, Vol.644-650, p.4641-4644

Ort / Verlag

Zurich: Trans Tech Publications Ltd

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Put forward an improved QIM watermark embedding algorithm. The carrier image is transformed into YCbCr space, lifting wavelet transform the three components, then using the QIM quantization method embeds watermark into high frequency coefficients of Cb and Cr component, and Y component of low frequency coefficients. The experimental results show that embedded watermark which using improved algorithm has good invisibility. Anti attack test results show that after using common attack method attack the image embedded watermark, it can still extract the watermark completely. The anti-attack performance of improved QIM algorithm is much better than texture watermarking algorithm based on DCT.