Estimating Canopy Bulk Density and Canopy Base Height using UAV LiDAR and Multispectral Images
Journal of remote sensing(2023)
Abstract
森æå å±ä½å¯åº¦ï¼Canopy Bulk Densityï¼CBDï¼åå å±åºé«ï¼Canopy Base Heightï¼CBHï¼æ¯è®¸å¤ç«è¡ä¸ºæ¨¡åçå ³é®è¾å ¥åæ°ãç¶èï¼å¨ä¸å½å¾å°æç ç©¶å ³æ³¨è¿äºåæ°çä¼°ç®ä»¥åå¨åºåç空é´åå¸æ åµãæ 人æºææ¯çåå±ä¸ºç²¾ç»å°ºåº¦ä¼°ç®CBDåCBHç空é´åå¸æä¾äºæºéãæ¬ç 究é¦å å©ç¨éå¤è°æ¥æ°æ®è®¡ç®æ ·å°çCBDåCBHï¼èåï¼å©ç¨æ 人æºLiDARç¹äºåå¤å 谱影åï¼æ建åºäºé¢ç¶åºåçæä¼åéåéæºæ£®æä¼°ç®æ¨¡åï¼å¹¶å¯¹ä¼°ç®ç»æè¿è¡è¯ä»·ï¼æåï¼ç»å¶ç 究åºçCBDåCBH空é´åå¸å¾ãç 究ç»æ表æï¼éç¨ç¸åæ°æ®æºå模åæ¶ï¼ä¼°ç®CBHçR2æ»æ¯é«äºCBDãCBDæä¼ä¼°ç®æ¹æ³ä¸ºèåLiDARåå¤å è°±æ°æ®çéæºæ£®æ模åï¼R2为0.5142ï¼RMSE为0.0773 kg/m3ï¼rRMSE为40.73%ãCBHçæä¼ä¼°ç®æ¹æ³ä¸ºä» 使ç¨LiDARæ°æ®çéæºæ£®æ模åï¼R2为0.6477ï¼RMSE为1.6245 mï¼rRMSE为31.17%ã使ç¨åä¸æ°æ®æºæ¶ï¼LiDARä¼°ç®ç²¾åº¦ææ¾é«äºå¤å è°±æ°æ®ãèå两ç§æ°æ®æºä¸ä¸å®æåCBDåCBHçä¼°ç®ç²¾åº¦ãæ¬ç 究ä¸æ建çæä¼åé模åéè¦3-6个ç¹å¾åéï¼éæºæ£®æ模ååéè¦è¾å ¥10-52个ç¹å¾åéãä» ä½¿ç¨å¤å 谱影åä¼°ç®CBDåCBHæ¶ï¼æä¼åéåå½ä¼°ç®ç²¾åº¦æ´å¥½ï¼ä½æ¯ç©ºé´é¢æµç»ææåå°è¡¨è¦çç±»åçå½±åãæ¬ç 究è½å¤ä¸ºæ£®æå å±å¯çç©åæ°ä¼°ç®æä¾æ¹æ³åèï¼åæ¶ä¹å¯ä»¥ä¸ºæç«è¡ä¸ºé¢æµæ¨¡åæä¾ç²¾ç»å°ºåº¦çè¾å ¥æ°æ®ã
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Key words
canopy base height,canopy bulk density,uav lidar
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