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Sains Malaysiana 46(11)(2017): 2119-2124 http://dx.doi.org/10.17576/jsm-2017-4611-12 Steep Slope DEM Model
Construction based on the Unmanned Aerial Vehicle (UAV) Images WENFEI XI1* & DONGSHENG LI2 1College of Tourism and Geographic
Sciences, Yunnan Normal University, Kunming 650050 China 2Kunming Metallurgy College, Kunming
650033, China Received: 27 January
2017/Accepted: 18 May 2017 ABSTRACT The DEM construction of high and steep slope has great importance
to slope disaster monitoring. The conventional method used to
construct high and steep slope DEM model requires larger field
surveying workload. First of all, the high and steep slope image
was obtained through unmanned aerial vehicle (UAV) platform;
Then the SIFT algorithm is used to extract the feature points
which are going to be matched accurately by using RANSAC algorithm.
Finally, stereo pair splicing method is used to generate orthogonal
images and construct DEM model. After comparing the DEM model
with actual slope measurement result collected by total station
finding, it is shown that elevation error between the DEM model
constructed by unmanned aerial vehicle (UAV) and actual measurement
is minimal and its efficiency is proven. Keywords: DEM model; high and steep slope; orthogonal
image; SIFT algorithm; unmanned aerial vehicle (UAV) ABSTRAK Pembinaan DEM di cerun tinggi dan
curam adalah
penting kepada pemantauan bencana cerun. Kaedah konvensional yang digunakan
untuk membina
model DEM cerun tinggi dan
curam memerlukan
beban kerja pengukuran
lapangan lebih
besar. Pertama, imej cerun yang tinggi dan curam
diambil melalui
platform kenderaan udara awasan automatik (UAV); kemudian, algoritma SIFT digunakan untuk mendapatkan ciri butiran yang akan dipadankan
dengan tepat
menggunakan algoritma RANSAC. Akhir sekali, kaedah
penyambatan pasangan
stereo digunakan untuk
menjana imej ortogonal
dan membina
model DEM. Selepas membandingkan keputusan model DEM dengan pengukuran cerun sebenar yang dikumpul melalui jumlah stesen, ditunjukkan bahawa ralat penaikan antara
model DEM yang dibina oleh
kenderaan udara awasan automatik (UAV) dan pengukuran sebenar adalah minimum dan kecekapannya telah dibuktikan. Kata kunci: Algoritma SIFT; cerun tinggi dan curam;
kenderaan udara awasan
automatik (UAV); imej ortogon; model DEM REFERENCES Abd Rahman, N.H., Lee, M.H., Suhartono & Latif, M.T. 2016. Evaluation
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