关键词: 壁画修复, Telea算法, 尺度空间, 小波纹理描述算法, 梯度算子

Abstract:

In recent years,murals digital restoration is greatly developed,but its main algorithms has no obvious effect on the restoration of image texture direction.In order to solve this problem and restore the original appearance of murals, we propose a simple and rapid mural repairing algorithm in which the Telea algorithm is improved. According to the multiscale feature of image texture,the proposal repairs texture structure of murals by using the wavelet texture description algorithm. To repair the murals’ texture, nonlocal gradient operator is used to calculate the nonlocal gradient value of pixels in unrepaired areas and diffusion is performed according to the global optimal direction. The experimental results demonstrate the effectiveness of the algorithm. 

Key words: mural inpainting;Telea algorithm;scale space;wavelet texture description algorithm;gradient operator