关键词:可逆数据隐藏; 预测误差差值扩展; 直方图平移; 溢出定位图
Reversible data hiding using prediction error difference expansion without location map
XIONG Zhi-yong, JIANG Tian-fa
(College of Computer Science, South Central University for Nationalities , Wuhan 430074, China)
Abstract:This paper proposed a reversible data hiding algorithm for color images using prediction error difference expansion. To avoid the drawback of Tian’s algorithm which must embed a location map and thequality decline of stego-images from excessive modulation to pixels, this algorithm using correlation of color components to decrease difference and disperse smaller expansion to two components, and improved histogram shifting technique to improve the quality of stego images, the embedding pixels was determined with sum of prediction values, so the algorithm did not need location map. Experimental results show the quality of stego-image is significantly improved, and the complexity is lower, when compared with other new or classical algorithms. ......