Zhongwei Sun Dengguo Feng Chuankun Wu DWT-Domain Blind Watermark Detection Based on Weak Signal Detection Theory. 1920-1926 2006 43 Journal of Computer Research and Development 11 http://WWW.CQVIP.COM/QK/94913X/200611/23242937.html db/journals/jcrd/jcrd43.html#SunFW06