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以３年生的山杨（Ｐｏｐｕｌｕｓｄａｖｉｄｉａｎａ）植株叶片为研究对象，应用电子计算机截取叶面形态的ＥＳＭ灰度图像，并对该图像进行分数维研究与伪彩图像处理，进而完成对叶片水分状态的评价。
Taking Populus davidiana plant leaves of 3-year-old as the research object, the electronic computer was used to intercept the ESM grayscale image of the leaf surface, and the fractal research and pseudo-color image processing of this image were carried out to evaluate the leaf water status .