CAJ | 학술논문

利用差值直方图偏移算法来预测像素差值实现可逆信息隐藏。提出了一种基于曲线拟合的可逆信息隐藏方案，该方案将图像划分成大小相等的块，每一块转化为相应的序列，序列中奇数坐标值用于曲线拟合，通过曲线拟合得到预测值，预测值减去产生差值的当前位置的像素即得到差值计算。秘密数据被嵌入在具有不同解释的差值直方图中，根据阈值来实现可逆信息的隐藏。实验结果表明，该算法不仅提供了高容量信息隐藏，而且峰值信噪比较其他算法更优，取得了良好的视觉效果。
이용차치직방도편이산법래예측상소차치실현가역신식은장。제출료일충기우곡선의합적가역신식은장방안，해방안장도상화분성대소상등적괴，매일괴전화위상응적서렬，서렬중기수좌표치용우곡선의합，통과곡선의합득도예측치，예측치감거산생차치적당전위치적상소즉득도차치계산。비밀수거피감입재구유불동해석적차치직방도중，근거역치래실현가역신식적은장。실험결과표명，해산법불부제공료고용량신식은장，이차봉치신조비교기타산법경우，취득료량호적시각효과。
T he difference histogram algorithm is used to offset the difference from the predicted pixels to achieve reversible information hiding . A reversible data hiding scheme based on curve fitting is proposed . The image is partitioned into equal‐sized blocks , and every block is transformed to a corresponding sequence . The values with odd coordinate in the sequence are maintained and used to curve fitting . The values with even coordinate in the fitted curve are predicted values . The predicted value subtracts the pixel of the current position to generate a difference . The differences are counted . Secret data is embedded in the differences by translating the histogram of the differences according to a threshold to achieve reversible data hiding . Experimental results show that the proposed algorithm not only provides high capacity , but also has the better peak signal noise ratio compared to other algorithm .