Because of the low resolution and few gray-level for B-ultrasonic images, we can hardly obtain satisfied result by the traditional edge detection methods.
由于B超图像的分辨率差、灰度级别少等特点，用传统的边缘检测方法难以得到满意的效果。
Aiming at the shortcomings of traditional edge detection methods, considering the features of computer vision measurement, a practical contour extraction method is introduced.
针对传统边缘检测方法中存在的问题，结合计算机视觉测量技术的特点，提出了一种实用的轮廓提取方法。
Experiments indicate that the traditional methods of edge detection are not ideal because of the bigger noise of remote sense image.
由于遥感图像一般带有较大的噪声，通过实验表明，用传统的边缘检测方法效果不理想。
At present, the methods of edge detection of erythrocyte are using traditional theory such as edge one-order or second-order orient differential coefficient and using simple methods to detect edge.
目前，红细胞边缘形态的检测一般都是利用传统的边缘检测方法，如边缘临近一阶或二阶方向导数法，利用简单的方法来检测边缘。
The image edge detection is the basis of image segmentation and image recognition. But the traditional methods of image edge detection are sensitive to noise.
图像边缘检测是图像分割、图像识别的基础，传统的边缘检测方法对噪声非常敏感。
The image edge detection is the basis of image segmentation and image recognition. But the traditional methods of image edge detection are sensitive to noise.
图像边缘检测是图像分割、图像识别的基础，传统的边缘检测方法对噪声非常敏感。
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