计算机科学 ›› 2014, Vol. 41 ›› Issue (5): 299-303.doi: 10.11896/j.issn.1002-137X.2014.05.064
胡文瑾,刘仲民,李战明
HU Wen-jin,LIU Zhong-min and LI Zhan-ming
摘要: 针对全变分小波图像修复算法在平滑区易产生阶梯效应并且噪声抑制不充分的缺陷,提出一种新颖的小波域图像修复模型。通过优化一个全变分和图像梯度的二范数的能量泛函来实现小波域的图像修复,使得在去除噪声的同时较好地保留了图像的边缘,在平滑区域削弱了阶梯效应,并利用有限差分法对所建立的扩散方程进行数值求解。实验结果表明:所提方法对于不同丢失比例的图像以及噪声图像都取得了较好的修复效果,尤其当小波系数丢失率较高时更为明显。
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