Host: The Japanese Forestry Society
Early detection of oak trees damaged by the ambrosia beetles using satellite remote sensing is expected. Reflectance spectrum by the damage status and bands are calculated from two scenes of ortho rectified QuickBird images. Reflectance of "dead" was lower than the "frass" and "healthy" in the pan band. Reflectance of band 1 of the multi sensor was almost same among three statuses. Reflectance of band 2 and 3 were also almost same among all statuses. However, it was considered that the dead crowns can be seen with red color on true color composite images are because of a little weakness of band 2 and a little strength of band3. Reflectance of band 4 was highest with "healthy", moderate with "frass" and lowest with "dead". Quick preprocessing, detection by human eyes with true color images and extracting lower reflection area using band 4 are recommended for early detection of damaged trees.
