NBN ISO 13322-2:2022

This document describes a method to transfer the images from particles having relative motion to
binary images within practical systems, in which the particles in the images are individually separated.
Images of moving particles are created by an optical image capture device. Effects of particle movement
on the images are either minimized by the instrumentation or corrected by software procedures. This
method is applicable to the particle images that are clearly distinguishable from static background.
Further processing of the binary image, which is then considered as static, is described in ISO 13322-1. A
dynamic image analysis system is capable of measuring a higher number of particles compared to static
image analysis systems. This document provides guidance on instrument qualification for particle
size distribution measurements by using particulate reference materials. This document addresses
the relative movement of the particles with respect to each other, the effect of particle movement on
the image (motion blur), the movement and position along the optical axis (depth of field), and the
orientation of the particles with respect to the camera.