基于AutoCAD软件确定番茄与青椒叶面积的简易方法

Simple model for tomato and green pepper leaf area based on AutoCAD software

为准确而方便的获取番茄和青椒的叶面积,利用扫描仪获取叶片图像,通过AutoCAD获取叶片的实际面积,并与田间实测叶长、叶宽及叶片长宽乘积分别进行回归分析,分别建立了叶长、叶宽及长宽乘积与实际叶面积的回归模型。研究结果表明,叶长、叶宽与叶面积呈幂函数关系,长宽乘积与叶面积呈线性关系;分别对3种估算模型模拟值进行误差分析结果显示,叶长、叶宽回归模型的模拟精度较差,而长宽乘积回归模型的模拟误差很小,精度较高,可以较真实地反映番茄和青椒叶面积的实际大小,叶片长宽乘积估算叶面积的折减系数分别为0.6393和0.6509。

In order to get tomato and green pepper＇s leaf area accurately and conveniently, scanner was used to get leaf＇ s images and AutoCAD was used to get actual leaves area. Regression analysis were carried on between actual leaf areas and leaf length, breadth, product of length-breadth measured in the field respectively, and regression models were established between leaf length, leaf breadth, product of leaf length-breadth and the actual leaves area respectively. The results showed that relations between the leaf length, the leaf breadth and the leaf area all assumes the power function, and relation between the product of leaf length-breadth and the leaf area assumes the linear. Errors analysis was carried on for three kinds of estimating models, and the results showed that accuracy of simulated value were bad for regression models of leaf length and leaf breadth. However, the estimated errors were much lower and precision was highest for the product of leaf length-breadth regression models for two kinds of crop, actual size of leaf area can be reflected truly, and the reduction coefficients were 0.6393 and 0.6509 respectively for tomato and the green pepper.