摘要
提出一种结合隐写技术的JPEG2000压缩码流非均等差错保护方法。依据JPEG2000码流的特点设计容错信息,然后对量化前的小波系数进行非线性处理,估算出量化以后各个小波系数上存在冗余的相对大小,根据估算的冗余对各个嵌入点处的嵌入强度进行图像自适应调整,最后将容错信息嵌入到图像的高频分量中,实现对码流的非均等差错保护。
An unequal error protection method based on steganography for JPEG2000 is proposed in this paper. First, the error resilience information is designed according to the characteristics of the JPEG2000 code stream. Then the wavelet coefficients are modified non-linearly before quantization. Relative redundancy of every wavelet coefficient is evaluated and the intensity of each embedded point is adjusted adaptively according to the estimated redundancy. Finally, the error resilience information is embedded into high-frequency components of the image, which realizes an unequal error protection for the code stream.
出处
《电子科技》
2005年第12期27-30,共4页
Electronic Science and Technology
基金
国家自然科学基金(60202009)
天津市自然科学基金(033600611)
中国民航学院科研启动基金资助项目。
