Improved Differential Energy Watermarking for Embedding Watermark. - Goo-Rak Kwon; Seung-Won Jung; Sang-Jae Nam; Sung-Jea Ko (IWDW, 2006)

Intellectual Property Rights Management Using Combination Encryption in MPEG-4. - Goo-Rak Kwon; Kwan-Hee Lee; Sang-Jae Nam; Sung-Jea Ko (IWDW, 2006)

A Novel Transcoding Technique between EVRC and G.729A for Mobile Multimedia Devices. - Goo-Rak Kwon; Ji-Min Chung; Sang-Jae Nam; Sung-Jea Ko (IEEE Trans. Consumer Electron., 2007)

Flash shadow detection and removal in stereo photography. - Sang-Jae Nam; Nasser Kehtarnavaz (IEEE Trans. Consumer Electron., 2012)