温维亮, 郭新宇, 王勇健, 李 超, 陆声链. 葡萄树地上部形态结构数据获取方法[J]. 农业工程学报, 2015, 31(22): 161-168. DOI: 10.11975/j.issn.1002-6819.2015.22.022
    引用本文: 温维亮, 郭新宇, 王勇健, 李 超, 陆声链. 葡萄树地上部形态结构数据获取方法[J]. 农业工程学报, 2015, 31(22): 161-168. DOI: 10.11975/j.issn.1002-6819.2015.22.022
    Wen Weiliang, Guo Xinyu, Wang Yongjian, Li Chao, Lu Shenglian. Morphological and structural data acquisition for above-ground part of grapevine[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2015, 31(22): 161-168. DOI: 10.11975/j.issn.1002-6819.2015.22.022
    Citation: Wen Weiliang, Guo Xinyu, Wang Yongjian, Li Chao, Lu Shenglian. Morphological and structural data acquisition for above-ground part of grapevine[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2015, 31(22): 161-168. DOI: 10.11975/j.issn.1002-6819.2015.22.022

    葡萄树地上部形态结构数据获取方法

    Morphological and structural data acquisition for above-ground part of grapevine

    • 摘要: 葡萄树为多年蔓生植物,其形态结构复杂且受人工修剪及架势的影响。获取葡萄树地上部植株及器官的形态结构及纹理数据,有助于建立3D可视化模型以表征该植株的品种遗传特征、受环境、架式和人工修剪等因素的影响。该文针对葡萄树形态结构数据获取工作量大、效率低、依靠单一手段所获取数据缺乏完整性等特点,提出一种高效的葡萄树地上部形态结构数据获取方法,首先对葡萄树进行拓扑结构解析和数字化表达实现复杂结构的显示表达;然后针对目标植株进行葡萄树三维形态数据采集,包括植株拓扑结构三维数字化数据采集、品种一致性与差异性分析的DUS(植物新品种特异性(distinctness)、一致性(uniformity)和稳定性(stability)的栽培鉴定试验或室内分析测试)数据采集,器官的形态参数测量,三维扫描与纹理数据采集,目标植株的栽培环境及人工管理措施等信息的采集。结果表明,基于所获取形态结构数据结合植物参数化建模方法重建的葡萄树器官与植株几何模型具有较高的真实感。在葡萄树形态结构数据获取方法的基础上,对植物地上部形态结构数据获取标准化流程进行探讨,以期为其他植物主要器官与植株的形态结构数据获取提供方法参考。

       

      Abstract: Abstract: Three-dimensional (3D) reconstruction of aerial plants using in-site measurement morphological data, which is effective and highly realistic, is one of the main approaches to show the morphological diversity of diverse cultivars and intra specific differences caused by cultivation and environment factors. In order to satisfy the demand of digital plant modeling using in-site measurement morphological data combined with the advanced instruments and approaches of current plant morphological data acquisition, in this study, we made a systematic exposition of the 3D morphological data acquisition method of aerial grapevine. Firstly, a target plant of grapevine was selected according to the demand of modeling cultivar, tree structure and cultivation factors. Secondly, to simplify the complex structure of grapevine, the topological structure of target grapevine was subdivided into structure units which were identified by a naming strategy to distinguish organ type, growth order and inter-connected relationships. This gave a digital representation of the real target grapevine and facilitates subsequent digital operations. On the basis of digital representation, morphological data acquisition was conducted including four parts:1) The topological structure of the whole grapevine plant determined the reconstruction accuracy and sense of reality, hence to describe the 3D topological distribution of plant skeleton, 3D digital data in point skeleton form of the target plant was captured using 3D digitizer. This process had many difficulties actually, such as wide range, complex field environment, electromagnetic interference, etc. We used the FastScan digitizer and its probe combined with Polhemus Long Ranger calibration system to overcome these difficulties. 2) The DUS (Distinctness, Uniformity and Stability) information, which was used to describe the cultivar feature of plants, was captured randomly on target cultivar grapevines. DUS information reduced the data acquisition work on the basis that the measured morphological data could reflect cultivar characteristics statistically, especially providing guidance for choosing representative grapevine organs when acquiring 3D scanning and texture image data. In addition, DUS information provided a statistical description of organ parameters which were hardly to measure due to the huge amount of organs. 3) Organ morphological data was obtained, including 3D scanning and 2D texture image. The 3D point cloud obtained by Artec EVA and Spider 3D scanners was used to reconstruct geometric models of grapevine organs, where the organs were chosen according to the DUS information to be more representative. Geometric models of organs had a unique name consistent with the naming strategy as a structure unit. 4) Supplementary information such as current growth period, cultivation density, special treatment of target grapevine, consulted from the grapevine growers and experts, were recorded to describe the growth environment. To demonstrate the data acquisition approach, we acquired the morphological data of five different kinds of cultivar grapevines during the florescence to the first fruit-swell stage as the target plant, including a structure diagram of the grapevine; a morphological and texture DUS information; 3D point clouds with texture of the grapevine truck; 3D topological representation of the grapevine obtained by 3D digitizer; point clouds of leaves with texture; and point clouds of new shoot internode with texture. Combined with parameterized plant modeling technique and the measured morphological data, the geometric models of grapevine plant and organs were reconstructed with highly realistic. The models were used for 3D exhibition of the 11th international conference on grapevine breeding and genetics. Finally, a procedure of plant morphological data acquisition was extracted and discussed for other plants, mainly including three parts: target plant selection, digital representation of plant structure and data acquisition. The procedure could constraint the morphological data acquisition of plants more systematic and standardized, which has significance for further study and provides efficient and accurate data to support the research of digital plant.

       

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