计算机与现代化
計算機與現代化
계산궤여현대화
COMPUTER AND MODERNIZATION
2015年
5期
53-56
,共4页
图像去噪%剪切波变换%各向异性扩散%多尺度分析%阶梯效应
圖像去譟%剪切波變換%各嚮異性擴散%多呎度分析%階梯效應
도상거조%전절파변환%각향이성확산%다척도분석%계제효응
image denoising%shearlet transform%anisotropic diffusion%multi-scale analysis%staircase effect
针对多尺度几何分析方法去噪时产生的伪Gibbs效应和各向异性扩散模型产生的阶梯效应，提出一种基于剪切波的改进各向异性扩散图像去噪方法。首先对噪声图像进行剪切波变换得到不同尺度的系数矩阵，然后利用改进的各向异性扩散方程对变换后的系数进行处理，实现建立在对图像精细分析基础上的各向异性扩散模型。实验结果表明，该方法能较好地抑制噪声和保持边缘，同时有效地抑制伪Gibbs效应，取得良好的视觉效果。
針對多呎度幾何分析方法去譟時產生的偽Gibbs效應和各嚮異性擴散模型產生的階梯效應，提齣一種基于剪切波的改進各嚮異性擴散圖像去譟方法。首先對譟聲圖像進行剪切波變換得到不同呎度的繫數矩陣，然後利用改進的各嚮異性擴散方程對變換後的繫數進行處理，實現建立在對圖像精細分析基礎上的各嚮異性擴散模型。實驗結果錶明，該方法能較好地抑製譟聲和保持邊緣，同時有效地抑製偽Gibbs效應，取得良好的視覺效果。
침대다척도궤하분석방법거조시산생적위Gibbs효응화각향이성확산모형산생적계제효응，제출일충기우전절파적개진각향이성확산도상거조방법。수선대조성도상진행전절파변환득도불동척도적계수구진，연후이용개진적각향이성확산방정대변환후적계수진행처리，실현건립재대도상정세분석기출상적각향이성확산모형。실험결과표명，해방법능교호지억제조성화보지변연，동시유효지억제위Gibbs효응，취득량호적시각효과。
To suppress the pseudo-Gibbs in multi-scale geometric analysis denoising and alert the staircase effect in anisotropic diffusion effectively , an image denoising method combining shearlet transform and improved anisotropic diffusion is proposed . Firstly, the noisy image is decomposed by shearlet transform , and different scale coefficient matrices are obtained .Then, the im-proved anisotropic diffusion equation is applied to process these shearlet coefficients , which realized a new anisotropic diffusion denoising based on multi-scale analysis of the image .Finally, the clean image is obtained from the processed shearlet coeffi-cients.Experiments show that the proposed method can suppress the pseudo-Gibbs and staircase effect, as well as reduce the noise and preserve the detail better .
