• 图形图像处理(Graphics and image processi • 上一篇 下一篇
沈维燕 韦志辉 段秋枫
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摘要： 为了在克服振荡现象的同时更多地保留图像细节部分，利用一种新的图像细节表征方法Contourlet变换，在Contourlet框架下嵌入全变差，提出了一种新的非线性无约束最优化图像去噪方法。由于Contourlet变换具有多分辨率分析和多方向的特性，使得在Contourlets域中建立模型比在小波域中建立模型更有优势。实验证明该方法在抑制噪声的同时不仅能够很好地减少阈值产生的振荡现象，同时也能很好地保持图像的边缘，是一种有效的去噪方法。
