激光与光电子学进展, 2020, 57 (22): 221006, 网络出版: 2020-10-24   

基于信息熵和梯度因子的改进Criminisi图像修复方法 下载: 926次

An Improved Criminisi Image Inpainting Method Based on Information Entropy and Gradient Factor
王凤随 1,2,3,*刘正男 1,2,3付林军 1,2,3
作者单位
1 教育部高端装备先进感知与智能控制重点实验室, 安徽 芜湖 241000
2 安徽省电气传动与控制重点实验室, 安徽 芜湖 241000
3 安徽工程大学电气工程学院, 安徽 芜湖 241000
摘要
针对传统Criminisi算法中优先权值很快趋于零,且修复时间较长等缺点,提出一种改进的基于信息熵和梯度因子的图像修复算法。首先,将图像信息熵与梯度因子拟合为权重因子,采用优化优先权的计算方式找到最优修复块;其次,利用可度量像素块复杂度的信息熵对匹配块的搜索区域进行调整,建立搜索区域的动态法则;然后,借助于梯度因子建立匹配块模板尺寸的自适应模型,完善最优匹配块搜索策略;最后,引入序贯相似性检测算法从源区域中选取最优匹配块,实现图像的修复。实验结果表明,与传统Criminisi算法相比,所提算法无论在客观方面还是在主观方面都获得了较满意的图像修复结果,修复效果更加真实,修复图像具有更好的视觉效果。
Abstract
In order to solve the shortcomings of the traditional Criminisi algorithm which the priority value tends to zero quickly and costs much inpainting time, an improved image inpainting algorithm is proposed based on information entropy and gradient factor. Firstly, the information entropy and the gradient factor for the image are fitted as weight factors, and the priority calculation method is optimized to find the optimal inpainting block. Secondly, the information entropy which can measure the complexity of the pixel block is used to adjust the search area of the matching block to establish a dynamic rule of the search area. Then, an adaptive model of the template size for the matching block is established with the help of the gradient factor to improve the optimal matching block search strategy. Finally, the sequential similarity detection algorithm is introduced to select the optimal matching block from the source region to achieve image inpainting. The experimental results show that compared with the traditional Criminisi algorithm, the proposed algorithm is effective both at the objective level and the subjective level. Moreover, the effectiveness of the image inpainting is more real, and the restored image has better visual effects.

王凤随, 刘正男, 付林军. 基于信息熵和梯度因子的改进Criminisi图像修复方法[J]. 激光与光电子学进展, 2020, 57(22): 221006. Fengsui Wang, Zhengnan Liu, Linjun Fu. An Improved Criminisi Image Inpainting Method Based on Information Entropy and Gradient Factor[J]. Laser & Optoelectronics Progress, 2020, 57(22): 221006.

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