| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to precisely and efficiently classify and determine a woody material.SOLUTION: A first group is classified based on calculations of scores of plural pieces of reflection spectrum information included in a population using a first second main component loading obtained by a main component analysis. Subsequently, a second group is classified based on calculations of scores of plural pieces of reflection spectrum information included in the population using a second second main component loading obtained by the main component analysis using a second population not including the first group reflection spectrum information. By performing the second main component analysis using the second population, the second group can be precisely classified based on minute characteristics included in the reflection spectrum information for each types of the material. Thus, precise classification can be made and the classification can be made more efficiently compared to conventional manner. |
