1. A particulate determination method for determining independence of a particulate as a measurement target according to a specific signal pattern that appears when a memory expressing a distribution of an electric signal is scanned along a predetermined scanning direction, said method including: a data storage step of storing a plurality of different recognition conditions based on signal levels of the specific signal pattern, flags that are obtained when results of determinations according to the respective recognition conditions are true, and flags that are obtained when the results of determinations are false, into plural memories which are provided correspondingly to the respective recognition conditions; and a particulate determination step of scanning arrays of the flags that are stored in the plural memories using scanning windows having the same predetermined size, and comparing rows of the flags in the same region on the memory expressing the distribution of the electric signal, on the arrays of the flags stored in the plural memories, thereby determining independence of the particulate.