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 predetermined recognition condition based on the shape of the specific signal pattern, a flag that is obtained when a result of determination according to the recognition condition is true, and a flag that is obtained when the result of determination is false, into a memory; and a particulate determination step of scanning an array of the flags stored in the memory using a scanning window having a predetermined size, and determining independence of the particulate from rows of the flags obtained when the result of determination in the scanning window is true.