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树木圆盘年轮宽度测定是研究树木生长过程、森林生产力的重要基础,也是测树学中至关重要的一项技能。为简洁高效地测定圆盘年轮宽度,本文介绍了3种借助图像处理软件测定年轮宽度的方法。该方法基于扫描或拍照后的圆盘图像,利用地理信息系统软件对年轮坐标信息进行提取,根据两点之间距离公式计算各年轮宽度。此法不仅可以提高测量精度,而且成本低廉,在不具备专业年轮测定仪器或软件时,更有利于发挥其作用。
Tree ring width measurement is to study the process of tree growth, an important basis for forest productivity, but also a vital skill in tree measurement. In order to concisely and efficiently measure the ring width of the disc, three methods for measuring the width of the ring wheel by means of image processing software are introduced in this paper. Based on the scanned or photographed disk image, the method extracts the annual ring coordinate information by GIS software and calculates the annual ring width according to the distance formula between two points. This method not only can improve the measurement accuracy, but also has the advantages of low cost and is more beneficial to play its role when there is no professional annual ring measuring instrument or software.