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NTIS 바로가기대한원격탐사학회지 = Korean journal of remote sensing, v.34 no.5, 2018년, pp.829 - 846
나상일 (농촌진흥청 국립농업과학원) , 박찬원 (농촌진흥청 국립농업과학원) , 소규호 (농촌진흥청 국립농업과학원) , 안호용 (농촌진흥청 국립농업과학원) , 이경도 (농촌진흥청 국립농업과학원)
Crop monitoring can provide useful information for farmers to establish farm management strategies suitable for optimum production of vegetables. But, traditional monitoring has used field measurements involving destructive sampling and laboratory analysis, which is costly and time consuming. Unmann...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
작황 모니터링의 장점은 무엇인가? | 작황 모니터링은 농민들에게 최적의 작물 생산을 위한 농작업 관리 전략을 수립하는데 유용한 정보를 제공할 수 있다. 그러나 시료 채취에 의한 분석 등에 한정된 기존의 현장 모니터링 방법은 많은 시간과 노동력이 필요하다. | |
토지이용도 및 토지 피복도를 작성하기위해 작물 분류 기법중 자동으로 클래스를 지정하는 방법의 장단점은 무엇인가? | 여기서 작물분류는 기존의 위성영상을 기반으로 토지이용도 및 토지피복도 (Land Use & Land Cover; LULC)를 작성하기 위하여 고안된 분류기법을 농경지에 적용하여 촬영 범위 내 모든 작물에게 자동으로 클래스를 지정하는 방법이다. 이 방법은 다양한 작물에 대한 재배면적을 짧은 시간에 파악할 수 있다는 장점이 있지만 사전에 분류 항목을 설정하기 위하여 대상지역 내 재배되는 모든 작물에 대한 사전 정보가 필요하다는 한계가 있다. 또한, 무인항공기 촬영 영상은 1 m 이내의 고해상도 영상으로 필지 내 토양과 멀칭을 위한 비닐 등의 피복상태가 잡음으로 반영 되어 위성영상과 비교하여 정확도가 감소하는 단점이 있다. 반면에 작물추출은 기존의 촬영된 영상을 기반으로 작성된 작물별 판독 라이브러리를 참고하여 육안판 독에 의한 디지타이징(digitizing) 방법 또는 작물 생육단 계별 식생지수 최고치(peak)가 나타나는 시기의 차이를 이용한 시계열 분석 방법 등을 이용하여 특정 작물의 재배 필지만을 추출하는 방법이다. | |
무인항공기의 의미는 무엇인가? | 무인항공기(Unmanned Aerial Vehicle; UAV)는 사람이 탑승하지 않고 지상에서 원격조종(Remote control) 을 이용한 반자동(Semi-auto-piloted) 형식으로 운영하거나 사전 프로그램 된 경로에 따라 자동(Autopiloted)으로 운영되는 비행체를 의미하며, 넓은 범위에서는 비행체 뿐만 아니라 이를 제어하는 지상통제장비(Ground Control System; GCS)와 통신장비, 지원장비 등의 전체 시스템까지도 포함하고 있다. 일반적으로 드론(Drone) 으로도 표현되고 있지만 드론의 어원이 ‘벌이 윙윙 거린다’라는 뜻의 영어단어에서 파생된 것으로 볼 때, 드론은 단순히 회전익 기체만을 의미하는 것으로 회전익 기체와 고정익 기체를 통칭할 경우에는 무인항공기 또는 UAV로 표기하는 것이 정확한 표현이라 할 수 있다. |
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