现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
17期
75-77
,共3页
信息隐藏%图像%抗压缩算法%LSB
信息隱藏%圖像%抗壓縮算法%LSB
신식은장%도상%항압축산법%LSB
information hiding%image%anti-compression algorithm%LSB
分析了压缩算法以及LSB算法对图像的影响,发现压缩效果存在块差异,因此,隐藏在图像中的秘密信息在图像有损压缩后,不同分块中的提取效果也是存在好坏差别,利用这种差别,提出一种图像信息隐藏新算法,即把秘密信息嵌入在抗压缩性能较好的分块上,从而实现具有一定抗压缩性能的空域信息隐藏算法。仿真实验证明:算法不仅嵌入提取简单,对JPEG和JPEG 2000具有一定抵抗性,而且算法嵌入容量大,能满足大图像中嵌入小图像的需求。
分析瞭壓縮算法以及LSB算法對圖像的影響,髮現壓縮效果存在塊差異,因此,隱藏在圖像中的祕密信息在圖像有損壓縮後,不同分塊中的提取效果也是存在好壞差彆,利用這種差彆,提齣一種圖像信息隱藏新算法,即把祕密信息嵌入在抗壓縮性能較好的分塊上,從而實現具有一定抗壓縮性能的空域信息隱藏算法。倣真實驗證明:算法不僅嵌入提取簡單,對JPEG和JPEG 2000具有一定牴抗性,而且算法嵌入容量大,能滿足大圖像中嵌入小圖像的需求。
분석료압축산법이급LSB산법대도상적영향,발현압축효과존재괴차이,인차,은장재도상중적비밀신식재도상유손압축후,불동분괴중적제취효과야시존재호배차별,이용저충차별,제출일충도상신식은장신산법,즉파비밀신식감입재항압축성능교호적분괴상,종이실현구유일정항압축성능적공역신식은장산법。방진실험증명:산법불부감입제취간단,대JPEG화JPEG 2000구유일정저항성,이차산법감입용량대,능만족대도상중감입소도상적수구。
The influence of compression algorithm and LSB algorithm on images are analyzed. It is found that the compres-sion results have block differences. So after lossy compression of image,the secret information hiding in the image also has differences of extraction effects in different blocks. With these differences , a new image information hiding algorithm is proposed,which embeds the secret information in blocks that have good anti-compression performance,so as to realize the space information hiding algorithm with anti-compression performance. The simulation results show that the proposed algorithm not only embeds and extracts information easily,but also has a certain resistance to JPEG and JPEG2000. The embedding capacity of the algorithm is large enough to meet the requirements of embedding small image in large image.