| 融合激光和机器视觉的立木胸径检测方法 |
| |
| 引用本文： | 程朋乐,刘晋浩,王 典.融合激光和机器视觉的立木胸径检测方法[J].农业机械学报,2013,44(11):271-275. |
| |
| 作者姓名： | 程朋乐 刘晋浩 王 典 |
| |
| 作者单位： | 北京林业大学;北京林业大学;北京林业大学 |
| |
| 基金项目： | 中央高校基本科研业务费专项资金资助项目（YX2013-15）、国家自然科学基金资助项目（31200431）和国家林业局引进国外林业先进技术项目（2011-4-02） |
| |
| 摘 要： | 为了提高立木胸径检测的效率，解决图像法测量立木胸径中的标定问题，提出了融合激光和机器视觉的立木胸径检测方法。将激光光束进行扩束准直后照射到立木树干上，采用树干上的激光光斑作为标尺进行图像测量。通过Otsu法对激光光斑进行分割，根据激光光斑的实际尺寸和像素数确定图像上立木胸径的位置，根据立木胸径的像素数计算出立木胸径值。试验结果表明，所提方法的测量结果与轮尺测量的胸径值最大误差1.22%，符合国家对森林资源清查操作的误差要求。
|
| 关 键 词： | 立木 胸径 机器视觉 激光 非接触测量 |
Measuring Diameters at Breast Height Using Combination Method of Laser and Machine Vision |
| |
| Cheng Pengle,Liu Jinhao and Wang Dian.Measuring Diameters at Breast Height Using Combination Method of Laser and Machine Vision[J].Transactions of the Chinese Society of Agricultural Machinery,2013,44(11):271-275. |
| |
| Authors: | Cheng Pengle Liu Jinhao and Wang Dian |
| |
| Institution: | Beijing Forestry University;Beijing Forestry University;Beijing Forestry University |
| |
| Abstract: | 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%. |
| |
| Keywords: | Standing trees Diameter at breast height Machine vision Laser Non-contact measurement |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
