【作者】 张健钦；

【导师】 邝朴生； 王秀；

【作者基本信息】 河北农业大学 ， 农业机械化工程， 2003， 硕士

【摘要】 化学除草是目前最主要的除草方式，但由于除草剂的使用方式都是大面积喷洒，不仅造成了浪费，也带来了许多负面的影响，如对水源、土壤和空气的污染等。提高除草剂的有效利用率是当务之急，研制用于化学除草的智能化变量喷药机是一条很有发展前景的新途径。智能化变量喷药机是指借助于计算机视觉技术，识别出杂草覆盖率并确定杂草的位置，有针对性地喷洒除草剂，这不仅能有效的减轻草害，而且能大大节约除草剂的使用，降低投入，还能保护生态环境。计算机视觉技术用于杂草识别是一个相当新的研究应用领域，目前理论和技术尚不成熟。智能化的变量喷药机能够做到利用计算机视觉技术实时根据杂草的生长密度变量喷洒药液，但是药液的浓度配制还不能实时进行。只能喷药前根据杂草的长势配制相应的药液浓度。杂草叶面积是评估杂草长势的重要指标，也是目前配制除草剂药液浓度的主要依据。论文应用计算机视觉理论和方法开发了一套包含测量叶面积的图像采集和调整模块、图像处理模块、叶面积数据库模块、叶面积曲线图显示和分析模块的软件系统，设计实现了既可用于采摘的叶片又可用于活体原位叶面积测量的硬件系统。整个系统既可用于测量杂草叶面积和分析杂草长势，也可用于其他绿色植物。针对户外采集的杂草图像论文研究实现了一种快速杂草识别算法，使其能够满足后续实时变量控制对信号的要求。根据这种算法设计了一种用于变量喷药机的杂草识别和信号控制系统，为进一步的研究工作打下了一定的基础。更多还原

【Abstract】 The chemical herbicide is the most effective way of weeding. However, much chemical herbicide are wasted and may cause pollution of water, air and soil because of its use for large area. One promising way of solving the problem is to study and apply the intelligentized variable herbicide machine. The intelligentized variable herbicide machine can sense the density and location of weeds, and spray herbicide according these. So it can alleviate the harm of weeds, reduce cost and protect environment effectively. Because it is a new research filed to apply computer vision for weed-sensing, there are not mature theories to support the weed-sensing technology. Although the intelligentized variable herbicide machine sprays herbicide according to the results of weed-sensing, the herbicide can not be compounded while spraying. The concentration of herbicide must be made before spraying according the condition of weeds. The leaves area of weed is the standard of making the concentration. In this paper a set of software is made including four modules such as image-processing mould based on computer vision. An equipment for measuring area of live leaves is developed. They can be used to measure and analyses all green leaves. A short time algorithm for outdoor weed-sensing is realized in this paper. It can provide controlling-signal for variable control, and a system of weed-sensing and variable control for the intelligentized variable herbicide machine is designed.更多还原