It is announced at ACRS2016（Asian Conference on Remote Sensing 2016）.

1. Remote Sensing with Multiple
Types of Photographs
Shuntaro Otsubo, Susumu Ogawa, Haruhiro
Hidaka, Tran Thanh Dan, Yoichi Imamura
Nagasaki University

2. Introduction
Recently, UAV (Unmanned Aerial
Vehicle) technology are developed
rapidly. UAV may work at lower cost
than satellite or aerial photos. The
expansion of research for UAV is
expected. However, the number of
bands for UAV is less than satellite
images. In this study, UAV, a digital
camera, aerial photos, and satellite
data were used in multiple types.
Phantom 4

3. Objectives
• To get RGB, near infrared, and short infrared
images with high resolution in multiple types
by UAV and a digital camera.
• To obtain NDVI and NDWI images with UAV
and a digital camera. NDWI is a normalized
difference water index.
• To monitor vegetation covers and to make a
land-use map with UAV and a digital camera.

4. Photographing methods with UAV
• IR72 filter is a band pass filter more than 720
nm. Near infrared photos are taken with UAV
and a digital camera with an IR 72 filter.
Additionally, IR90 filter is a band pass filter
more than 900 nm. Short infrared photos are
taken with UAV and a digital camera with an
IR 90 filter.
IR72 filter

5. Methods: Paddy field map
• Band 3 distributions were calculated in the survey
field with PhotoScan. Band 3 distribution made
paddy field maps because vegetation absorbed
Band 3, red.

6. Study area
Onigi paddy fields

7. NDVI at Onigi village (July 30 2016)

8. RGB image with UAV
NIR image with UAV NDVI image in Hasami with UAV

9. Orthogonal images with UAV (left) and
aerial photos (right) at Onigi village
Resolution: 6 cm

10. Fine resolution DEM at Onigi
Resolution: ~10 cm

11. NDWI at Onigi village (July 30 2016)
Rice paddy
fields

12. Detecting a land use map at
Onigi village
Tea
plantations
Rice paddy
fields
Abandoned
Fields

13. CONCLUSIONS
• RGB, near infrared, and short infrared images were
obtained by a digital camera with band pass filters,
while RGB and near infrared were inquired by UAV
with 6 cm resolution.
• NDVI images were obtained by a digital camera and
UAV with IR72, while NDWI images were estimated
by a digital camera with IR72 and IR90, which
estimates water contents and permeability in soils.
• Vegetation cover was monitored in any time and also
land use map was obtained with fine-resolution DEM.

14. Thank you for your attention