摘要
针对由于裁剪、翻转和旋转等产生的图像拷贝问题,提出一种Shi-Tomasi角点的拷贝检测算法.先使用Shi-Tomasi角点检测算法提取图像的局部角点;然后在以Shi-Tomasi角点为中心的圆环区域内计算特征向量的协方差描述子(多特征融合);最后通过协方差描述子的相似性度量来检测圆环区域的相似性,并以此判断检测图像是否为原图像的拷贝.实验结果证明,该检测算法对图像的裁剪、旋转等攻击具有较好的鲁棒性.
An image copy detection algorithm based on Shi-T0masi corner to detect the image copy transformed by cropping, flipping, and rotating efficiently was proposed. Firstly, the local corner was extracted by Shi- Tomasi corner detector. Secondly, the circle area around the corner was constructed and the covariance descriptor of the feature vector of the region as the similarity of circle area was calculated. Finally~ whether the image was a copy by the similarity of circle area was determined. The experiment results demonstrate that this algorithm has a good robustness to the crop and rotation transformation.
出处
《中国计量学院学报》
2014年第3期263-267,共5页
Journal of China Jiliang University
