共查询到10条相似文献,搜索用时 46 毫秒
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Alberto Tellaeche Xavier P. BurgosArtizzu Gonzalo Pajares Angela Ribeiro Csar Fernndez-Quintanilla 《Computers and Electronics in Agriculture》2008,60(2):144-155
One of the objectives of precision agriculture is to minimize the volume of herbicides by using site-specific weed management systems. To reach this goal, two major factors need to be considered: (1) the similarity of spectral signatures, shapes, and textures between weeds and crops and (2) irregular distribution of weeds within the crop. This paper outlines an automatic computer vision method for detecting Avena sterilis, a noxious weed growing in cereal crops, and differential spraying to control the weed. The proposed method determines the quantity and distribution of weeds in the crop fields and applies a decision-making strategy for selective spraying, which forms the main focus of the paper. The method consists of two stages: image segmentation and decision-making. The image segmentation process extracts cells from the image as the low-level units. The quantity and distribution of weeds in the cell are mapped as area and structural based attributes, respectively. From these attributes, a multicriteria decision-making approach under a fuzzy context allows us to decide whether any given cell needs to be sprayed. The method was compared with other existing strategies. 相似文献
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针叶树种计算机视觉苗木自动分级系统的研究 总被引:7,自引:0,他引:7
针对苗木分级领域的实际需要及国际苗木分级技术发展状况,研究,设计了针叶树种计算机视突苗木自动分级系统。该系统应用计算机视觉技术和神经网络技术。通过对苗木图像的处理。在实验室中实现对苗木的自动分级,实验研究表明,计算机视觉自动分级系统在苗木分级领域中具有良好的应用前景。 相似文献
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基于邻域直方图的玉米田绿色植物图像分割方法 总被引:1,自引:0,他引:1
为了准确分割绿色植物与土壤背景,克服田间环境的复杂性,比如植物阴影、残渣的存在和光照强度变化等外界因素带来的影响,采用图像处理和支持向量机方法,以超绿特征(2G-R-B)灰度图像为研究对象,以像素点邻域组成的灰度直方图特征作为输入特征向量,通过试验选出最佳训练参数和最优邻域窗口模型。实验表明,该方法适应不同光照强度,并且可以减小噪声、植物阴影和残渣对图像分割带来的影响,得到完整的分割图像。 相似文献
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Xin ZhangDaoliang Li Wenzhu YangJinxing Wang Shuangxi Liu 《Computers and Electronics in Agriculture》2011,78(1):71-79
Foreign fibers in cotton seriously affect the quality of cotton products. The identification of foreign fibers in cotton is a critical step in the automated inspection of foreign fibers in cotton; image segmentation is crucial in this identification process. This paper presents a new approach for segmenting images of foreign fibers in cotton. Firstly, color images were captured, and the edge of color images were detected by an edge detection method based on improved mathematical morphology. The color images were subsequently converted into a gradient map, the law of experience values was analyzed, and the best thresholding value of the gradient map was chosen by selecting the best experience value iteratively. The experiment results indicate that the proposed method successfully segments the high-resolution color images of cotton foreign fibers both directly and precisely. Furthermore, the speed of image processing is much faster than that of conventional methods. 相似文献
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对插秧机的自动导航技术作了初步介绍,并分析了国内外插秧机自动导航技术的研究现状,介绍了用GPS技术、机器视觉技术和惯性传感器技术对插秧机进行导航的原理、方法及试验获得的精度;对国内插秧机自动导航研究现状也作了分析。最后对插秧机自动导航面临的问题作了总结,并提出了建议。 相似文献
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叶片的形态测量在苗木生长自动监测中具有重要意义,在形态测量前首先要将完整的叶片从背景中提取出来.针对彩色苗木叶片图像的特点研究了利用几何活动轮廓模型进行完整叶片的自动分割的方法.首先利用图像的全局信息和C-V模型进行初始分割,当曲线到达目标边界附近时,利用改进的基于图像局部信息的能量模型进行边界的精确定位.该方法将C-... 相似文献