论文部分内容阅读
本文介绍了一种操作简便、精度较高的圆盘解析测量方法:先在圆盘上放置刻度尺,利用数码相机拍摄圆盘以获得数字影像,通过计算机软件对数字影像校正,并进行每圈年轮半径的测量;然后,依次点选直径线与每圈年轮的交点,算出交点和髓心之间的坐标距离,并代入拟合方程,即可得到年轮的径向尺寸。分析结果显示,此方法测量半径的最大误差为0.007650 cm,最小误差为0.000040 cm,平均误差为0.002477 cm,而常规的毫米刻度尺测量方法的精度仅达到毫米与亚毫米级,大型专业的树木年轮分析仪器精度一般精度范围在0.0005~0.0010 cm。此方法具有成本低、方便快捷、操作简单、精度较高等优点,是一种有推广价值的树木年轮半径测量方法,对分析树木生长过程具有重要意义。
This paper presents an easy and accurate method for analyzing and analyzing discs: placing a scale on a disc, capturing a disc with a digital camera to obtain a digital image, correcting the digital image with computer software, Then measure the radius of the annual ring; then, click the intersection of the diameter line and each ring in turn to calculate the coordinate distance between the intersection point and the medullary center, and substitute the fitting equation to get the radial dimension of the annual ring. The results show that the maximum error of this method is 0.007650 cm, the minimum error is 0.000040 cm and the average error is 0.002477 cm. However, the precision of the conventional millimeter scale measurement method only reaches millimeter and submillimeter, and the large professional tree year General accuracy of wheel analysis instruments range from 0.0005 to 0.0010 cm. The method has the advantages of low cost, convenience, quickness, simple operation and high precision, and is a popularized method for measuring the radius of tree rings, which is of great significance for analyzing the growth process of trees.