计算机应用与软件
計算機應用與軟件
계산궤응용여연건
COMPUTER APPLICATIONS AND SOFTWARE
2014年
2期
307-311
,共5页
压缩感知(CS)%数字水印%人类视觉系统(HVS)%量化%盲提取
壓縮感知(CS)%數字水印%人類視覺繫統(HVS)%量化%盲提取
압축감지(CS)%수자수인%인류시각계통(HVS)%양화%맹제취
Compressive sensing (CS)%Digital watermark%Human eye visual system (HVS)%Quantification Blind extraction
现有的数字水印算法的研究成果大多在变换域,此类方法嵌入水印相对于空域而言数据量较大,安全性较高,鲁棒性较强,但是其计算复杂且抗攻击和防提取能力仍然有限。因此根据压缩感知 CS (Compressive Sensing)的特点,结合人眼视觉系统(HVS)的特性,提出一种性能更高的数字水印算法,利用块不均匀度来选取容量大的子块,采用量化的方法自适应地选择量化步长来嵌入经过置乱处理后的数字水印。经实验验证,该算法保证数字水印具有更好的鲁棒性、隐蔽性和安全性,并且提高了含水印图像的抗攻击和防提取能力,而且提取水印不需要原始图像的参与,大大降低了存储载体数据的成本。
現有的數字水印算法的研究成果大多在變換域,此類方法嵌入水印相對于空域而言數據量較大,安全性較高,魯棒性較彊,但是其計算複雜且抗攻擊和防提取能力仍然有限。因此根據壓縮感知 CS (Compressive Sensing)的特點,結閤人眼視覺繫統(HVS)的特性,提齣一種性能更高的數字水印算法,利用塊不均勻度來選取容量大的子塊,採用量化的方法自適應地選擇量化步長來嵌入經過置亂處理後的數字水印。經實驗驗證,該算法保證數字水印具有更好的魯棒性、隱蔽性和安全性,併且提高瞭含水印圖像的抗攻擊和防提取能力,而且提取水印不需要原始圖像的參與,大大降低瞭存儲載體數據的成本。
현유적수자수인산법적연구성과대다재변환역,차류방법감입수인상대우공역이언수거량교대,안전성교고,로봉성교강,단시기계산복잡차항공격화방제취능력잉연유한。인차근거압축감지 CS (Compressive Sensing)적특점,결합인안시각계통(HVS)적특성,제출일충성능경고적수자수인산법,이용괴불균균도래선취용량대적자괴,채용양화적방법자괄응지선택양화보장래감입경과치란처리후적수자수인。경실험험증,해산법보증수자수인구유경호적로봉성、은폐성화안전성,병차제고료함수인도상적항공격화방제취능력,이차제취수인불수요원시도상적삼여,대대강저료존저재체수거적성본。
Most research achievements of existing digital watermarking algorithms are in transform domain.Relative to the spatial domain, the watermarks embedded with these methods have larger data volume,higher security and stronger robustness,but it is complex in computation and limited in attack resistance and anti-extraction capabilities.Therefore,we propose a digital watermarking algorithm with higher performance according to the characteristic of compressive sensing (CS)and in combination with human eye visual system (HVS).It selects the sub-block with larger capacity by the non-uniformity of the block,and embeds the scrambled digital watermark by using quantification method to adaptively choose the quantified steps.It is verified through experiments that the algorithm ensures the watermark to obtain better robustness,invisibility and security.At the same time,it also improves the capability of defending against attack and extraction of the image with watermark embedded.Furthermore,the watermark extraction does not need the involvement of the original image,this remarkably decreases the cost of storing carrier data.