CAJ | 학술논문

针对传统三维数字图像嵌入水印算法保留的水印特征信息过多，易被攻击的弊端，提出了一种考虑水印特征隐藏的三维数字图像保护方法，对于待加入水印的三维数字图像，引入分块DCT算法对原始图像进行水印特征隐藏处理并得到水印特征隐藏图元矩阵，再将水印图像通过BCH编码进行特征隐藏降噪压缩。根据设定的特征隐藏系数随机分配图元位置并插入原始图像中，得到包含特征隐藏水印的数据图像。仿真结果表明，该方法嵌入的特征隐藏水印不仅可抵抗多种不同类型攻击，比传统算法抗噪声攻击性提高了约25%，抗剪切攻击性提高了15%左右。
침대전통삼유수자도상감입수인산법보류적수인특정신식과다，역피공격적폐단，제출료일충고필수인특정은장적삼유수자도상보호방법，대우대가입수인적삼유수자도상，인입분괴DCT산법대원시도상진행수인특정은장처리병득도수인특정은장도원구진，재장수인도상통과BCH편마진행특정은장강조압축。근거설정적특정은장계수수궤분배도원위치병삽입원시도상중，득도포함특정은장수인적수거도상。방진결과표명，해방법감입적특정은장수인불부가저항다충불동류형공격，비전통산법항조성공격성제고료약25%，항전절공격성제고료15%좌우。
In view of the traditional three-dimensional digital image watermark algorithm retains the watermark information is overmuch, the disadvantages of vulnerability, this paper proposes a consider hidden three-dimensional digital image wa-termarking features protection method, for to join 3 d digital image watermark, introducing block DCT algorithm to the origi-nal image for watermarking features hidden process, and get the watermark hidden primitive matrix, then the watermark im-age features hidden noise reduction by BCH coding compression. According to a set of primitive features hidden coefficient randomly assigned position and insert in the original image, get contains features hidden watermark data image. Simulation results show that this method is characteristic of the embedded hidden watermark can resist a variety of different types of at-tacks, not only about 25% higher than that of traditional algorithm noise attack resistance, resistance to shear attack in-creased by 15%.