学术
摘 要:
土壤表层含水率是影响作物生长的重要因素,在节水灌溉控制系统中对其进行在线检测尤为重要。运用计算机数字图像处理技术,探索一种土壤表层含水率在线检测的新方法。通过土壤表层图像的中值滤波、图像模式转换和＂坏区＂过滤,提取图像的特征参数——灰度值,并对土壤表层图像的灰度值与其含水率的关系进行了试验研究。理论分析与试验结果表明,土壤含水率的百分比与土壤表层图像的灰度值之间是一种近似线性的函数关系。[著者文摘]
文章出处:
《农业工程学报》-2007年23卷10期 -57-61页
栏目信息:
文献标识码:
A
文章编号:
1002-6819（2007）10-0057-05
Methods for on-line measurement of soil moisture content based on image processing technique
Zhang Rongbiao;He Jiaxiang;Wu Tao;Feng Youbing （College of Electrical and Information Engineering;Jiangsu University;Zhenjiang 212013;China）
Abstract:
Soil moisture content is an important factor of influencing crop＇s growth. It is very important that the moisture content is measured online in water-saving irrigation control system especially. By application of computer digital image processing technique, a method for measuring soil moisture content online is put forward. After median filtering, image mode transforming, and ＂bad area＂ filtrating to images of soil layer, the authors extract the characteristic parameter of a image, that is gray-value, and carry out experiments on the relationship between the gray-value of soil layer image and the soil moisture content. The theoretical analysis and the experimental results show clearly that there is an approximate linear function relationship between the percentage of soil moisture content and gray-value of soil layer image.[著者文摘]
Key words:
soil moisture content;online measurement;invariable false alarm rate;image mode transform;median filtering
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