CAJ | 학술논문

针对现有高容量水印嵌入算法中载体图像失真问题，提出一种邻域差值预测的可逆水印算法，该算法通过计算相邻像素差值的绝对值来决定是否嵌入水印。为确保较高的图像质量，设置理想阈值，嵌入过程中如果绝对差值高于预设的阈值，则像素保持不变。结果表明，与同类算法相比，该算法具有较好的图像质量和高嵌入容量。
침대현유고용량수인감입산법중재체도상실진문제，제출일충린역차치예측적가역수인산법，해산법통과계산상린상소차치적절대치래결정시부감입수인。위학보교고적도상질량，설치이상역치，감입과정중여과절대차치고우예설적역치，칙상소보지불변。결과표명，여동류산법상비，해산법구유교호적도상질량화고감입용량。
To solve the image distortion of its carrier that occurs in high capacity reversible watermarking , a re-versible watermarking algorithm was proposed to determine whether the pixel is embeddable or not by calculating the absolute difference of its neighboring pixels .In order that the image might be in a higher quality , and that the threshold should be an ideal one , the pixel should be unchanged in insetting if the absolute difference is higher than the threshold expected .Experimental results and performance comparisons showed that the proposed method has much better visual quality and higher capacity than the methods recently proposed .