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英文翻译中文

2.3 Development of reference table Since the θ-L relationship is different for different block heights, the projection angle calibration must ideally be performed for the specific height each time the height measurement needs to be carried out. Since this is not practical, a reference table was developed that can be used
to find the θ-L relationship for any object heights by interpolation.
The projection angle calibration was carried out for different block heights to obtain the reference table. Six pieces of glass plates of approximate thickness 2 mm each were used. The calibration was first done at 2 mm height using a single piece, than the height was increased until all six pieces were placed together, giving an overall height of approximately 12 mm. Adhesive compound was not used to attach the glass pieces to avoid errors due to non-uniform compound thickness. The projection angle variation was determined as before by scanning the block surface and the background in the phase map and subtracting the pixel coordinates of points having the same intensities. The actual heights of the glass block pieces were measured using the laser sensor. This method was used to generate the reference table for θ-L relationship for any height less than 12 mm. The data were linear-fitted using the leastsquares method and are shown in Fig. 7. The linear-fitted data were used to obtain the reference table (Table 1). The θ-L relationship for any height within 12 mm can be
obtained by interpolation from the reference table.
2.4 Projection angle variation across the field of view In addition to varying with height, the projection angles for a non-collimated light source also varies across the field-ofview (FOV). To investigate the error introduced by the projection angle variation across the FOV, the heights of four glass blocks, positioned across the FOV, were calculated using the θ-L relationship formulated from the reference table for a fixed location. The average heights of
each glass block were measured using the laser instrument at selected points at 10 mm interval. The average heights of the four blocks measured using the laser instrument were, respectively, 5.72 mm, 5.70 mm, 5.81 mm and 5.73 mm and the mean height of all four blocks is 5.74 mm. Since the projection angle calibration was previously done for the height of 5.73 mm (Table 1), it was not necessary to carry out interpolation from the reference table due to the small difference in height (0.01 mm). The equation derived for the illumination angle at height 5.73 mm is given by:
（一个数学公式，跳过）

Answer 1

2.3发展的参考表自θ一L的关系是不同的不同块高地，投影角度校准必须履行理想的具体高度，每次测量需求的高度来进行。由于这是不切合实际，参考表的开发，可用于找到θ一L关系的任何物体的高度插值。

投影角度进行了校准不同区块的高度，以获取参考表。六块玻璃钢板的厚度2毫米近似每个人使用。校准完成首次在2毫米的高度使用一块比身高增加，直至所有六件放在一起，使整体高度约为12毫米。胶粘剂复合不被重视的玻璃碎片，以避免错误，由于非均匀复合层厚度。投影角度的变化决定前通过扫描块表面和背景中的相图，并减去像素坐标点具有相同的强度。实际高度的玻璃块件测量使用激光传感器。这种方法是用来产生参考表θ左旋关系的任何高度小于12毫米。这些数据是线性拟合使用最小二乘法，并显示在图。 7 。线性拟合数据被用来获取参考表（表1 ） 。的θ左旋关系范围内的任何高度12毫米可插值法求得的参考表。

2.4投影角度的变化整个视野除了随高度，投影角度对非准直光源也不尽相同外地ofview （视场） 。调查的误差所介绍的投影角度的变化整个视野，高度四个玻璃块，整个视场的位置，分别计算使用θ左旋关系制定的参考表为一个固定的位置。平均高度

每块玻璃被利用激光测量仪器在选定的点， 10毫米间隔。平均高度的4次盖帽使用激光测量仪器分别五点七二毫米，五点七零毫米，五点八一毫米和五点七三毫米和平均身高的所有4次盖帽是五点七四毫米。由于投影角度校准以前所做的高度五点七三毫米（表1 ） ，所以没有必要进行插值从参考表由于小差异高度（ 0.01毫米） 。方程导出了照明角度高度五点七三毫米给予：

答案你参考下吧~

Answer 2

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Answer 3