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Automatic diagnosis of strawberry water stress status based on machine vision

International Journal of Agricultural and Biological Engineering 2019年第1期12卷 159-164页

作者： Han Li Jian Yin Man Zhang nick sigrimis Yu Gao Wengang Zheng Key Laboratory for Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural UniversityBeijing 100083China Department of Natural Resources Management and Agricultural Engineering Agricultural University of AthensAthens 11855Greece School of Electronic and Information Engineering Hebei University of TechnologyTianjin 300401China National Research Center of Intelligent Equipment for Agriculture Beijing 100097China

Water stress status of plants is very important for irrigation ***,plant water stress status monitoring has become the bottleneck of irrigation *** this study,an automatic water stress status monitoring method for strawberry plant was proposed and realized using combined RGB and infrared image *** image and infrared images were obtained using RGB digital camera and infrared thermal camera,which were placed in a fixed shell in *** the first experimental stage,three kinds of water stress treatments were carried out on three groups of strawberry plants,and each group includes three *** point plant temperature,dry surface temperature,wet surface temperature were *** the second experimental stage,the infrared and visible light images of the canopy leaves were ***,plant temperature,dry surface temperature,wet surface temperature,and stomatal conductance were measured not only for single point but also for plant area temperature *** information of infrared image and visible light image was analyzed using image processing technology,to calculate the average temperature of plant *** on single point temperature,area temperature,dry surface temperature and wet surface temperature of the plant,single point crop water stress index(CWSI)and area CWSI were *** analysis of variance(ANOVA),the experimental results showed that CWSI measured for plants under different treatments,were significantly *** correlation analysis,the experimental results showed that,determination coefficient between area CWSI and the corresponding stomatal conductance of three strawberry groups were 0.8834,0.8730 and 0.8851,respectively,which were larger than that of single-point CWSI and stomatal *** results showed that area CWSI is more suitable to be used as the criteria for automatic diagnosis of plants.

关键词： automatic diagnosis water stress crop water stress index machine vision strawberry

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基于多光谱图像分析的温室黄瓜叶片营养元素检测与诊断

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光谱学与光谱分析 2010年第1期30卷 210-213页

作者：杨玮 nick sigrimis 李民赞中国农业大学现代精细农业系统集成研究教育部重点实验室北京100083 Department of Agricultural Engineering Agricultural University of Athens Athens Greece

采用CCD照相机加滤光片的方法,进行了基于多光谱图像分析的温室黄瓜叶片营养元素检测与诊断研究。对近红外光波段的叶片图像分别采用遗传算法和分水岭算法进行阈值选取,对两种算法二值化的效果进行对比分析,结果表明采用分水岭方法分割... 详细信息

采用CCD照相机加滤光片的方法,进行了基于多光谱图像分析的温室黄瓜叶片营养元素检测与诊断研究。对近红外光波段的叶片图像分别采用遗传算法和分水岭算法进行阈值选取,对两种算法二值化的效果进行对比分析,结果表明采用分水岭方法分割的图像,边界清晰,噪音小,与原图像更接近,背景和叶片分离的效果更好。NDVI与叶面积、叶片含氮量之间有明显的线性关系,R^2分别为:0.820 9和0.701 7。GNDVI与叶面积、叶片的含氮量之间也有较高的线性关系,R^2分别为:0.762 5和0.676 2。RVI与叶面积之间有明显的线性相关关系,R^2为0.857 7,但与叶片的含氮量之间则包含了非线性成分,R^2为0.598 8。以上结果表明,CCD照相机加滤光片可以作为一种作物含氮量信息的快速诊断方法。

关键词：多光谱氮含量 NDVI 黄瓜图像处理

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日光温室封闭式栽培系统的设计与试验

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农业工程学报 2013年第21期29卷 159-165页

作者：袁洪波王海华庞树杰李莉 nick sigrimis 中国农业大学现代精细农业系统集成教育部重点实验室北京100083 河北农业大学机电工程学院保定071001 农业机械化科学研究院北京100083 Department of Agricultural Engineering Agricultural University of AthensAthensl 1855Greece

土壤连作灾害、生产资源严重浪费和环境污染已成为日光温室生产中制约其发展的瓶颈问题,为了解决这些问题,实现节水、节肥、保护环境的目的并提高温室生产的管理水平和自动化水平,该文设计了一种日光温室封闭式栽培系统。与传统栽培管... 详细信息

土壤连作灾害、生产资源严重浪费和环境污染已成为日光温室生产中制约其发展的瓶颈问题,为了解决这些问题,实现节水、节肥、保护环境的目的并提高温室生产的管理水平和自动化水平,该文设计了一种日光温室封闭式栽培系统。与传统栽培管理方式不同,该系统使用基质栽培代替土栽方式,采用基质袋装或塑料薄膜完全包裹的模式,实现了与外界环境的有效隔离;使用水肥一体化营养液滴灌代替水肥分离灌溉方式,回收多余营养液并循环利用;采用无线传感器网络模式,实现了温室环境信息的自动采集和发送。试验结果表明,采用封闭式栽培比传统土栽方式番茄产量提高了11.7%,水、肥用量均节省了2%(基质不同,节省水、肥量不同),同种基质情况下,采用封闭式栽培方式,由于营养液实现了循环利用,水、肥节省率可以达到17.2%。

关键词：温室水肥料环境监测一体化封闭式栽培基质日光温室

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Estimating Nitrogen Content of Cucumber Leaves Based on NIR Spectroscopy

Estimating Nitrogen Content of Cucumber Leaves Based on NIR ...

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作者： Yang Wei Li Minzan nick sigrimis Key Laboratory of Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural University

A machine vision method CCD camera and a NIR method NDVI tester were used to measure the spectral reflectance of the cucumber leaves in different nitrogen *** the reflectance information of cucumber leaves were obtained,the vegetation indexes,RVI,NDVI and GNDVI were calculated and then the correlation coefficients between each vegetation index and nitrogen content or leave area were *** result showed that there was an obvious linear correlation between NDVI got from CCD camera and nitrogen content of leaves or leave area,the R were0.8209 and 0.7017 *** high correlations were also observed between GNDVI and nitrogen content of leaves or leave area,the R were 0.7625 and 0.6762 *** trend of correlation between RVI and nitrogen content is disagreed with the correlation between RVI and leave *** is an obvious linear correlation between RVI and leave area,and the R is *** the correlations between RVI and nitrogen content appears nonlinear relationship,and Ris only *** experimental result proves machine vision method CCD camera can be used as a good method on diagnosing nitrogen content of *** Machine vision method and NIR method of NDVI tester on cucumber leaves are proved to be significant and convenient.

关键词： Spectral Characteristic Nitrogen Content NDVI Cucumber Photo Process

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