So the edge extracting must be done for grain measurement.
为了测量颗粒粒径，需要做边缘提取。
The algorithm consists of two part: edge statistical judgement and edge extracting.
该算法包括边缘统计判决及边缘检测两部分。
Owing to the difficulties in extracting iris edge image, a new iris location algorithm using geometric symmetry feature and edge detection from gray scale image is presented.
针对虹膜二值边缘图像提取的困难，提出利用虹膜图像的灰度边缘图像以及虹膜的几何特征进行虹膜定位的快速算法。
Aiming at the disadvantage of fuzzy image, by making some analysis about extracting edge feature based on fuzzy contrast enhancement algorithm, two images registration is achieved.
针对模糊图像的弱点，分析了通过增强象素模糊属性对比度来提取边界特征的基本原理，实现了两幅图像的配准。
By identifying and inputting the image format, improving the quality of image, extracting and enhancing the edge of image, the image-based numerical control engraving system was researched.
通过对图像格式识别与输入、图像质量改善、图像边缘提取和增强，进行了基于图像的数控雕刻系统研究。
A fast algorithm to extracting straight lines from edge images is proposed in this thesis.
本文提出一种从边缘图像中提取直线的快速算法。
Firstly the new algorithm processes the image by extracting edge and thresholding, then calculates the correlation of the binary images using the defined ESD distance.
该算法首先对图像进行边界提取并二值化，然后利用所定义的基于边缘的相似距离(esd)对处理后的二值图像进行相似性匹配运算。
In this paper, the noise is first removed by using Multistage Combination Filter remained the initial image's detail, after that, the Extracting Edge will be completed.
文章针对这一情况采用了保持图像细节的多级组合滤波器先将噪声从图像中分离出来，然后再对图像进行边界提取。
Extending the type of model in edge-based tracking from CAD model to general mesh model by extracting the silhouette from the 3D model.
利用抽取轮廓边的算法将边跟踪算法从CAD模型扩展到一般的面片模型。
Research on the method for extracting edge in noise image;
提出一种基于快速模拟退火的噪声图像配准算法。
For the sand porous condensate gas reservoirs with edge water, when the water has broken through in the gas Wells, liquid extracting should not be carried out by only several Wells.
对砂岩孔隙性边水凝析气藏，气井见水后不能靠少量井提掖排水。
For the sand porous condensate gas reservoirs with edge water, when the water has broken through in the gas Wells, liquid extracting should not be carried out by only several Wells.
对砂岩孔隙性边水凝析气藏，气井见水后不能靠少量井提掖排水。
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