Xiaomei Xing, Yuesheng Zhu, Zhiwei Mo, Ziqiang Sun, Zhen Liu, Vol. 9, No. 12, December 30, 2015
10.3837/tiis.2015.12.017

• Perceptual hashing
• color images
• pure quaternion
• full quaternion
• Quaternion Discrete Cosine Transform

Ziqiang Sun, Yuesheng Zhu, Xiyao Liu, Liming Zhang, Vol. 7, No. 11, November 28, 2013
10.3837/tiis.2013.11.012

• Content-based copy detection
• video fingerprint
• copyright control
• spatio-temporal gradient
• concentric rings