Image Inpainting with Adaptive Offset Smoothing Operator
Shuozhong Wang · Jisuanji gongcheng · 2008
An image inpainting technique with adaptive filter is proposed. The filter is a nonlinear smoothing operator with a window whosecenter may deviate from the current missing pixel to be estimated in order to avoid edge blurring. The size and position of the window are adaptivelychosen so that the gray-level variance of the interior pixels is below a given threshold and the number of undamaged pixels is sufficiently large. For atradeoff between image quality and computation efficiency, the algorithm switches between the eccentric window approach for pixels near edges,and the conventional centered window for pixels in a smooth area. Experimental results show that the proposed method provides good results forboth types of pixels. In addition, a fragile watermark is embedded into the image to be protected by using a modified checksum method. In this way,subsequently damaged regions can be easily located.