针对图像匹配受几何变形的影响，提出了一种基于相邻像素间的灰度差异来提取图像多像素边缘的方法。
To reduce the influence of geometrical deformation on image matching, we put forward a method which can detect multi-pixels edge of image.
传统的图像边缘检测算子一般都只能得到多像素宽边缘，这为后续的图像处理带来了一定困难。
The traditional image edge detectors can only get multiple-pixel-wide edges usually, thus it is difficult to operate by post-processing methods.
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