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基于三維激光掃描的樹木三維綠量測定
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“十二五”國家科技支撐計劃資助項目（2012BAH34B01）和高等學(xué)校博士學(xué)科點專項科研基金資助項目（20110014120002）


Tridimensional Green Biomass Measurement for Trees Using 3-D Laser Scanning
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    摘要:

    利用三維激光掃描儀獲取單株樹木的點云數(shù)據(jù)，通過點云數(shù)據(jù)的處理提取測樹因子,，將樹冠分割為多個不規(guī)則的臺體,，對每個臺體的體積加和，近似為樹冠體積,。同時將綠視率引入三維綠量的計算中,，以樹冠不同視角綠視率加權(quán)平均和與樹冠體積相乘計算樹木三維綠量。實驗選取了6個樹種,、共13棵樹的點云數(shù)據(jù),，以樹冠體積和綠視率2種方法計算三維綠量，結(jié)果表明：單純以樹冠體積計算平均三維綠量,，針葉樹大于闊葉樹,；而通過綠視率計算，闊葉樹綠視率為55.41%,，平均三維綠量為253.02 m3,，而針葉樹綠視率為30.75%，平均三維綠量為146.75 m3,，不論是綠視率或者三維綠量,，闊葉樹均大于針葉樹，與傳統(tǒng)方法相比更符合樹木的實際情況,。

    Abstract:

    A method applying 3-D laser scanning to estimate tridimensional green biomass of individual trees was proposed. For each objective tree, some tree parameters were obtained such as height, diameter at breast and crown width of an individual tree from cloud points, which were gotten from 3-D laser scanning. Then, through dividing crown into a plurality of irregular bodies, the volume of crown was regarded as the summation of volume of each body. Finally, the product of tridimensional green biomass and weighted average green looking rate from different perspectives and volume of tree crown was obtained. The method was tested on 13 trees, 6 species, and the results showed that the average tridimensional green biomass of broadleaf trees was 253.02 m3 and 146.75m3 for coniferous trees. It was obvious that the average tridimensional green biomass of broadleaf trees was bigger than coniferous ones, which was contrary to results from traditional method. 

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王佳,楊慧喬,馮仲科.基于三維激光掃描的樹木三維綠量測定[J].農(nóng)業(yè)機(jī)械學(xué)報,2013,44(8):229-233. Wang Jia, Yang Huiqiao, Feng Zhongke. Tridimensional Green Biomass Measurement for Trees Using 3-D Laser Scanning[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(8):229-233.

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  • 在線發(fā)布日期: 2013-07-19
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