松材线虫病变色松树遥感监测研究进展

目的]综合评述了松材线虫病变色松树遥感监测的数据和方法研究进展,并就星-机-地多源遥感数据协同监测变色松树提出展望。方法]通过分析松材线虫病染病松树的生理生态特征和冠层光谱,综述遥感数据的获取、基于遥感数据的变色松树解译方法,讨论当前松材线虫病变色松树遥感监测存在的主要问题,并指出未来可能的研究方向。结果]不同的遥感监测平台对于变色松树的识别各具其优势,地面调查具有高可靠性优势、卫星遥感具有多时相优势、无人机遥感具有高空间分辨率和高灵活性优势。其中以无人机遥感和高分卫星遥感为主的遥感技术的发展,伴随着遥感图像解译算法和计算机软硬件的改进,为松材线虫病疫区变色松树的快速定位和计数提供了新的手段。但新手段在变色松树监测过程中还存在着监测手段单一,定位位置偏差大、识别精度和识别效率低等问题。结论]未来随着卫星数量的增多和无人机影像获取成本的减少,从多源遥感影像上采用人工智能算法快速定位出单株变色松树和疫区变色松树的计数将成为新的模式。

Progress in Remote Sensing Monitoring for Pine Wilt Disease Induced Tree Mortality:A Review

Objective]To survey the recent developments and summarize the urgent research problems on remote sensing monitoring for pine wilt disease(PWD)induced tree mortality,then to put forward a research idea of monitoring the attacked pine trees via scheme of satellite-airborne-ground collaboration which can meet the complex terrain conditions of south China.Method]The characteristics of physio-ecology and canopy spectra of affected pine trees were analyzed.The acquisition of remote sensing images,the location and counting of affected pine trees in the past decades were investigated.In addition,some research problems on remote sensing monitoring for PWD induced tree mortality were discussed,and the prospects of future studies were expected.Result]Each monitoring platform of remote sensing for attacked pine trees has its own advantage.For example,high reliability for ground survey,multi-temporal for remote sensing satellite platform,high spatial resolution and flexibility for unmanned aerial vehicle(UAV)remote sensing platform.Of which,the technologies of UAV and high resolution satellite have made a great progress,as well as the interpretation algorithm of remote sensing images.Those two aspects provide a new idea to the quick monitoring of PWD induced pine trees.However,when monitoring the PWD induced tree mortality using the new technologies,there exist some problems,such as the single monitoring means,large position deviation,and low recognition precision and efficiency.Conclusion]In the future,with the ever-increasing satellites platform and ever-lower cost of UAV,the quick locating of individual affected pine trees and evaluate the damage levels based on multi-source remote sensing data will become a new perspective.