基于ORB和WHT的电力视觉快速水印算法研究

基于对电力信息安全保护及实时性的需求,提出了基于 ORB 和沃尔什哈达码变换( WHT )的快速数字水印算法。首先,提取 ORB 特征点并对其进行筛选优化,选择特征点邻域作为水印嵌入区域;然后,对各邻域进行 WHT 变换嵌入水印,生成含密载体图像,提取水印过程为嵌入水印的逆过程。实验表明,这种快速水印算法,运行时间远小于常规水印算法,不可见性良好,对几何攻击和噪音攻击具有良好的抵抗力。

Research on Fast Watermarking Algorithm for Power Vision Based on ORB and WHT

Based on the demand for information security of the power and real-time performance , this paper proposes a fast digital watermarking algorithm based on ORB(oriented FAST and rotated BRIEF )and WHT( walsh hadamard transform ) .Firstly , the ORB feature points are extracted and optimized , the feature point neighborhood is selected as the watermark embedding area , WHT transformation is performed on each neighborhood to embed the watermark , and generate the dense carrier image.The watermark extraction process is the reverse process of embedding the watermark.Experiments show that the fast watermarking algorithm proposed has a much shorter running time than conventional watermarking algorithms , it has good invisibility , and good resistance to geometric attacks and noise attacks.