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融合激光和機(jī)器視覺的立木胸徑檢測(cè)方法
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中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目（YX2013-15）、國家自然科學(xué)基金資助項(xiàng)目（31200431）和國家林業(yè)局引進(jìn)國外林業(yè)先進(jìn)技術(shù)項(xiàng)目（2011-4-02）


Measuring Diameters at Breast Height Using Combination Method of Laser and Machine Vision
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    摘要:

    為了提高立木胸徑檢測(cè)的效率，解決圖像法測(cè)量立木胸徑中的標(biāo)定問題，提出了融合激光和機(jī)器視覺的立木胸徑檢測(cè)方法。將激光光束進(jìn)行擴(kuò)束準(zhǔn)直后照射到立木樹干上，采用樹干上的激光光斑作為標(biāo)尺進(jìn)行圖像測(cè)量。通過Otsu法對(duì)激光光斑進(jìn)行分割，根據(jù)激光光斑的實(shí)際尺寸和像素?cái)?shù)確定圖像上立木胸徑的位置，根據(jù)立木胸徑的像素?cái)?shù)計(jì)算出立木胸徑值。試驗(yàn)結(jié)果表明，所提方法的測(cè)量結(jié)果與輪尺測(cè)量的胸徑值最大誤差1.22%，符合國家對(duì)森林資源清查操作的誤差要求。

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    The application of digital photographic method in the forest has shown great potential for improving the accuracy and efficiency. Image acquired with acommercially available digital camera were used to make measurements on 10 Platanus orientalis stems. Laser spot was used as scale instead of pole. The laser spot was extracted from the background by the 2-D Otsu algorithm. Error studies showed that the laser spot should be set at 1.3m high to improve the measurement accuracy. The accuracy of this method for measuring diameters at breast height was tested by comparing the results with those obtained from caliper. The comparison showed that the photographic method provided a good assessment of standing tree diameters at breast height and the maximum error was 1.22%.

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程朋樂,劉晉浩,王 典.融合激光和機(jī)器視覺的立木胸徑檢測(cè)方法[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(11):271-275. Cheng Pengle, Liu Jinhao, Wang Dian. Measuring Diameters at Breast Height Using Combination Method of Laser and Machine Vision[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(11):271-275.

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  • 在線發(fā)布日期: 2013-11-07
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