计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
20期
141-144,160
,共5页
异性扩散%自适应滤波%图像平滑%高斯滤波
異性擴散%自適應濾波%圖像平滑%高斯濾波
이성확산%자괄응려파%도상평활%고사려파
anisotropic diffusion%adaptive filtering%image smoothing%Gaussian filter
固定尺度的高斯滤波器对图像中的所有像素使用相同的加权系数,在平滑噪声的同时也模糊了边缘信息,影响了后期的边缘定位和提取,为此提出了一种异性扩散的自适应仿高斯滤波器,通过计算当前像素与周围像素的灰度梯度,预判该像素类型(噪声点或是边缘点),并根据像素点类型和梯度生成自适应的、各向异性的加权系数,通过多次平滑迭代实现权重的异性扩散。实验结果表明,该滤波算法具有平滑噪声的同时保留并锐化边缘效果。
固定呎度的高斯濾波器對圖像中的所有像素使用相同的加權繫數,在平滑譟聲的同時也模糊瞭邊緣信息,影響瞭後期的邊緣定位和提取,為此提齣瞭一種異性擴散的自適應倣高斯濾波器,通過計算噹前像素與週圍像素的灰度梯度,預判該像素類型(譟聲點或是邊緣點),併根據像素點類型和梯度生成自適應的、各嚮異性的加權繫數,通過多次平滑迭代實現權重的異性擴散。實驗結果錶明,該濾波算法具有平滑譟聲的同時保留併銳化邊緣效果。
고정척도적고사려파기대도상중적소유상소사용상동적가권계수,재평활조성적동시야모호료변연신식,영향료후기적변연정위화제취,위차제출료일충이성확산적자괄응방고사려파기,통과계산당전상소여주위상소적회도제도,예판해상소류형(조성점혹시변연점),병근거상소점류형화제도생성자괄응적、각향이성적가권계수,통과다차평활질대실현권중적이성확산。실험결과표명,해려파산법구유평활조성적동시보류병예화변연효과。
Gaussian filter with fixed scale-parameter uses the fixed coefficients for every pixel to smooth image. The noise is smoothed out while the edge is distorted. The defect will influence the edge detection and extraction later. Therefore a kind of anisotropic diffusion smooth algorithm is proposed in this paper. In the algorithm, the type(noise or edge)of current pixel is pre-dicted by calculating the gray-gradients of the pixels around the pixel, and according to the pixel type and gradients, the unique and anisotropic coefficients for the pixel are generated. The coefficients anisotropic diffusion is achieved by some times itera-tion. The experimental results show that, the algorithm can smooth noise while preserving and sharpening the edge.