Logo extraction using dynamic stochastic resonance

被引：10

作者：

Jha, Rajib Kumar ^{[1
]}

Biswas, P. K. ^{[2
]}

Shrivastava, S. ^{[1
]}

机构：

[1] PDPM Indian Inst Informat Technol Design & Mfg, Jabalpur 482005, India

[2] Indian Inst Technol, Kharagpur 721302, W Bengal, India

来源：

SIGNAL IMAGE AND VIDEO PROCESSING | 2013年 / 7卷 / 01期

关键词：

Digital image watermarking; Discrete wavelet transform; Discrete cosine transform; Dynamic stochastic resonance; DIGITAL IMAGE WATERMARKING; SCHEME;

D O I：

10.1007/s11760-011-0236-6

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a novel technique for watermark (logo) extraction from the distorted watermarked images. The proposed technique is based on the combined discrete wavelet transform (DWT), discrete cosine transform (DCT), and dynamic stochastic resonance (DSR). In this technique, DCT transform is applied to the DWT coefficients of the watermarked image. Later on, variance is calculated from the DCT coefficients, and it is used to tune the DCT coefficient with the help of dynamic double-well system parameters that causes resonance to DCT coefficients. The experimental results have been compared with the existing techniques and were found superior in terms of peak-value-of-signal-to-noise-ratio (PSNR) and correlation coefficient.

引用

页码：119 / 128

页数：10

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