2005 Volume 4 Pages 175-191
Although the Minnaert constant of the Minnaert topographic correction method would be decided depending on each landcover, there is almost no example which compared how much it would change according to an observation scene. The purpose of this study is comparing the Minnaert constants among three forest types at each scene using multitemporal remote sensing image. The Minnaert constant for each forest type was computed by the sampling data from the same topographical feature conditions (slope angle and slope azimuth), and significant difference test was performed. Furthermore, the Minnaert constants from the stratified random sampling data only on topographical feature conditions were obtained without specifying a forest type and I discussed their identity. The study area is forested area of the Sangun mountainous region, the environs of Fukuoka city, Japan. The satellite images were SPOT/HRV data of seven scenes observed during 1997. As a result of the comparing the Minnaert constant among three forest types from the sample of the same topographic conditions, significant differences were not recognized on some scenes. The Minnaert constants from the random sampling data only stratified on topographic conditions indicated no significant differences in all scenes and bands. Consequently, even if the sample changed, when stratifying on topographical feature conditions, stable Minnaert constant may be acquired.
