Abstract
The ambrosia beetle, Platypus quercivorus, is a vector of Japanese oak wilt, which causes massive mortality of oak trees in Japan. Some mid-resolution multispectral images such as ALOS/AVNIR-2 true color images can be used to help detect areas of oak wilt, although such detection by inventory surveys is not realistic. Furthermore, high resolution images may be more useful for this purpose. Applying pan-sharpening techniques, a higher spatial resolution multispectral image can be generated from lower-resolution multispectral images and higher-resolution panchromatic images. In this study, pan-sharpened image was generated using the Brovey transformation and evaluated for the detection of damage points. The detection rate of the pan-sharpened image was 1.36 times higher than that of the 62.5 m multispectral image.
