A feature quantity calculation device to calculate a feature quantity for a 3-D
object from 3-D object data contained in the 3-D object includes a 3-D object data
input module to input the 3-D object data, a 3-D object data analysis module to
analyze the input 3-D object data, a volume data conversion module to convert the
analyzed 3-D object data to volume data, and a feature quantity calculation module
to calculate a feature quantity from the converted volume data.
