Particle group characteristic measurement device, particle group characteristic measurement method, storage medium recording program for particle group characteristic measurement device, particle diameter distribution measurement device, and particle diameter distribution measurement method

Abstract

A particle group characteristic measurement device includes an image acquisition portion that acquires images of a particle group, a particle information extraction portion that processes acquisition images acquired by the image acquisition portion, and then extracts particle information which is information about particles appearing in the acquisition images, and a particle group characteristic calculation portion that calculates a particle group characteristic at a plurality of time points in a time series based on the particle information extracted from a plurality of the acquisition images acquired prior to respective time points. The particle group characteristic calculation portion calculates the particle group characteristic at each time point based on the plurality of acquisition images used to calculate the particle group characteristic at time points previous to that time point, and on the particle information extracted from the plurality of acquisition images whose image acquisition time periods partially overlap each other.