GF-1衛(wèi)星多時(shí)相組合近紅外數(shù)據(jù)水稻識(shí)別能力
本文關(guān)鍵詞: 遙感 作物 面積識(shí)別 多時(shí)相 近紅外波段 GF-/WFV 水稻 出處:《農(nóng)業(yè)工程學(xué)報(bào)》2017年23期 論文類(lèi)型:期刊論文
【摘要】:針對(duì)近紅外波段水稻識(shí)別能力的問(wèn)題,選擇銀川市所屬的5個(gè)縣區(qū)為研究區(qū)域,采用2016年5月18日、6月16日、7月30日、9月13日4個(gè)時(shí)相GF-1/WFV影像的近紅外波段(0.76~2.526μm)數(shù)據(jù),基于決策樹(shù)分類(lèi)方法,獲取了4個(gè)單時(shí)相、3個(gè)多時(shí)相條件下的水稻識(shí)別結(jié)果,并與全波段數(shù)據(jù)分類(lèi)結(jié)果進(jìn)行了比較。單時(shí)相5、6、7和9月份近紅外波段水稻識(shí)別精度分別為83.63%、57.40%、75.82%和62.61%,除5月份精度高于全波段5.75個(gè)百分點(diǎn)外,其他時(shí)相都低于全波段識(shí)別精度,6月份相差最高為30.23個(gè)百分點(diǎn)。多時(shí)相5/6、5/7、5/6/7/9月份組合,近紅外水稻識(shí)別精度分別為83.76%、93.93%和94.03%,分別比全波段低5.47,高8.58和0.73個(gè)百分點(diǎn)。結(jié)果表明,水稻生長(zhǎng)早期的5月份、中期的7月份,近紅外波段可以作為單時(shí)相遙感識(shí)別數(shù)據(jù)源,包括生長(zhǎng)早期和中期2個(gè)時(shí)相在內(nèi)的多時(shí)相近紅外波段組合都可以作為遙感識(shí)別的數(shù)據(jù)源,研究結(jié)果可以作為GF-1數(shù)據(jù)水稻遙感識(shí)別的依據(jù)。
[Abstract]:In order to solve the problem of rice recognition ability in near infrared band, five counties of Yinchuan city were selected as study areas, May 18th 2016, June 16th and July 30th were adopted. In September 13th, four single phase GF-1/WFV images were obtained based on the decision tree classification method based on the near infrared band (0.76 ~ 2.526 渭 m) of four temporal GF-1/WFV images. The results of rice identification under three multi-phase conditions were compared with the results of full-band data classification. The accuracy of rice recognition in single-phase 5Y6H7 and NIR region in September was 83.63%, respectively. The accuracy of 57.40% and 62.61% is lower than that of full band recognition except that in May the accuracy is higher than that in the whole band by 5.75%. In June, the maximum difference was 30.23 percentage points. In the combination of 5 / 6 / 7 / 5 / 7 / 7 / 7 / 9, the accuracy of near-infrared rice recognition was 83.76%, respectively. The values of 93.93% and 94.03 were 5.47 lower and 8.58 and 0.73 percentage points higher than those of the whole band, respectively. The results showed that the rice growth period was May in the early stage and July in the middle period. The near infrared band can be used as the data source of single phase remote sensing recognition, and the combination of multi-time and similar infrared bands, including the early and middle phases of growth, can be used as the data source of remote sensing recognition. The results can be used as the basis of rice remote sensing recognition based on GF-1 data.
【作者單位】: 中國(guó)農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與農(nóng)業(yè)區(qū)劃研究所;
【基金】:國(guó)家重點(diǎn)研發(fā)計(jì)劃“糧食作物生長(zhǎng)監(jiān)測(cè)診斷與精確栽培技術(shù)”課題“作物生長(zhǎng)與生產(chǎn)力衛(wèi)星遙感監(jiān)測(cè)預(yù)測(cè)”(2016YFD0300603)
【分類(lèi)號(hào)】:S511;TP79
【正文快照】: 0引言水稻是中國(guó)三大糧食作物之一,準(zhǔn)確掌握水稻種植面積是中國(guó)農(nóng)作物種植結(jié)構(gòu)調(diào)整的依據(jù)。遙感技術(shù)具有客觀性強(qiáng),覆蓋范圍廣的特點(diǎn),是區(qū)域農(nóng)作物面積信息準(zhǔn)確獲取的主要技術(shù)[1]。近紅外譜段(0.76~2.526μm)介于可見(jiàn)光與中紅外光之間,水稻在近紅外波段有較高的反射率,而水體則
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