摘要: IQTM-F5方法在高嵌入比情况下,DCT系数直方图统计特性会被破坏。针对该问题,利用新的信息嵌入策略并结合IQTM-F5方法中采用的修改后量化表,提出一种保持DCT系数直方图统计特性的F5隐写方法。实验结果表明,该方法能够取得与IQTM-F5方法近似的信息隐藏容量和嵌入效率,隐秘图像具有更高的图像质量,并且抗直方图统计分析攻击的能力更强。
关键词:
隐写术,
JPEG图像,
量化表修改,
高嵌入比,
嵌入策略,
离散余弦变换,
DCT系数直方图统计特性
Abstract: IQTM-F5 method may destroy Discrete Cosine Transform(DCT) coefficient histogram statistic characteristic at the time of high embedding rate. Aiming at the problem, this paper proposes a new F5 steganographic method using the same modified quantization table as that in IQTM-F5, but adopts different embedding strategy to preserve the DCT coefficient histogram statistic characteristic. Experimental results show that the proposed method achieves the same steganographic capacity and embedding efficiency as IQTM-F5, and obtains better stego-image quality and stronger resistibility to histogram statistical steganalysis.
Key words:
steganography,
JPEG image,
Quantization Table Modification(QTM),
high embedding rate,
embedding strategy,
Discrete Cosine Transform(DCT),
DCT coefficient histogram statistical characteristic
中图分类号:
鲁国鹏, 叶学义, 汪云路, 张艳. 一种基于量化表修改的F5隐写方法[J]. 计算机工程, 2012, 38(24): 123-127.
LU Guo-Feng, XIE Hua-Xi, HONG Yun-Lu, ZHANG Yan. An F5 Steganographic Method Based on Quantization Table Modification[J]. Computer Engineering, 2012, 38(24): 123-127.