Applying the radial section scanning method based on gray centroid, the image edges are tested with a sub-pixel precision.

采用基于灰度质心法的径向截面扫描法对图像边缘进行亚像素级检测；

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This floor comprises a face board and a base material, the surface of base material is timber cross section, radial section or staggered section of timber cross section and radial section.

该地板包括表板、基材，基材的表面为木材横切面、径切面或者木材径切面和横切面的交错面。

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Radial horizontal well is the most complicated one in horizontal well series, it has a major horizontal section and one or several branch sections.

辐向水平井是水平井系列中的高难度井，它除了有一段水平井段外，还有另外一条或多条分支井段。

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