中心线

Aiming at shadow influence problem in vision navigation process of agricultural robot, illumination invariant image based on shadow removal algorithm was introduced. An enhanced OSTU image segmentation method was used, and an optimized Hough transformation algorithm was used to extract crop line, and coordinate transform was applied to obtain navigation parameters.

该研究针对农业机器人视觉导航中存在的阴影干扰问题，采用基于光照无关图的方法去除导航图像中的阴影，然后采用增强的最大类间方差法进行图像分割和优化的Hough变换提取作物行中心线，最终通过坐标转换获得导航参数。

Because of the cragginess of the 3-D surface, the distortion stripes appear when the common rectangular grating or sine grating is projected onto the object surface, which includes information about the 3-D surface profilometry. The images including distortion stripes are taken by CCD camera. The 2-D stripes information is got after processing these images. On the basis of mathematic reconstruction model and arithmetic, the 3-D surface profilometry data are gotten.

用普通白光将矩形光栅或者正弦光栅投影于被测物体表面上，由于物体外形凹凸等几何形状变化而在物体表面产生畸变条纹，这些畸变条纹就包含了物体表面形状的三维信息，由CCD摄像头摄取这些畸变条纹信息，对这些图像进行相应的处理，得到有关条纹中心线的二维信息，然后再根据相应的数学转换模型和重构算法对物体的轮廓进行重构，就可以得到被测物体表面的三维外形数据信息。

Because of the cragginess of the 3-Dsurface, the distortion stripes appear when the common rectangular grating or sine grating is projected onto the object surface, which includes information about the 3-Dsurface profilometry. The images including distortion stripes are taken by CCD camera. The 2-D stripes information is got after processing these images. On the basis of mathematic reconstruction model and arithmetic , the 3-D surface profilometry data are gotten.

用普通白光将矩形光栅或者正弦光栅投影于被测物体表面上，由于物体外形凹凸等几何形状变化而在物体表面产生畸变条纹，这些畸变条纹就包含了物体表面形状的三维信息，由CCD摄像头摄取这些畸变条纹信息，对这些图像进行相应的处理，得到有关条纹中心线的二维信息，然后再根据相应的数学转换模型和重构算法对物体的轮廓进行重构，就可以得到被测物体表面的三维外形数据信息。

Outside the path, Kathmandu experiences a partial eclipse of magnitude 0.962, while Dacca witnesses a 0.930 magnitude event.

在路径外，尼泊尔最大的城市Kathmandu经历亮等为0.962的全食。00：59UT，日蚀的中心线到达不丹。

The centerline of elastic rod or elastic filament can be abstracted as space curves to deal with them by the knowledge of the theory of space curve and differential geometry.

由于弹性杆的中心线或弹性细丝可以抽象成空间曲线，然后根据空间曲线论和微分几何的知识进行处理。

Vessel connections for external cage displacer level switches shall normally be 50 mm (2") flanged with a centreline to centreline dimension of 356 mm (14").

外浮筒式液位开关的容器管口应通常是50 mm (2")的，中心线之间的距离为356 mm (14")的法兰。

Equipped with a centerline flying boom - along with two underwing hose and drogue pods, plus a fuselage hose and drogue refueling unit - the KC-45 can refuel multiple aircraft simultaneously, and is interoperable with U.S. Air Force, Navy, Marine Corps and allied aircraft on the same mission without downtime for ground reconfiguration.

装备一副中心线加油伸缩套管－外加两个翼下软管和锥形套吊舱，加上一副机身软管和锥形加油单元－KC-45能够同时给多架飞机加油，并且不需要经过地面改装即可在同一次任务中供美国空军，海军，海军陆战队和盟国的飞机通用。

As speed increases, the American Eskimo Dog will single track with the legs converging toward the center line of gravity while the back remains firm, strong, and level.

随着速度增加，美国爱斯基摩犬趋向于单一轨迹，由于地心引力的作用，四肢向身体中心线聚拢，背部保持稳固、强健和水平。

Bolt hole should be drilled without fash or burr, and slant central line should be no more than 2mm.

高强度螺栓孔必须是钻成的，孔边应无飞边、毛刺，中心线倾斜度不得大于2mm 。

The next area of concern affecting pick-up reliability is the parallelism of the head to the feeder pick-up center line.

影响拾取可靠性相关的第五个因素是贴装头对喂料器拾取中心线的平行度。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。