1. A system for classifying particles in a liquid sample, system comprising: an optical detection assembly comprising at least one image acquisition device and corresponding lens with an optical axis, the image acquisition device is configured to acquire images of an image acquisition area perpendicular to the optical axis; a sample device comprising at least one sample container suitable for holding a sample in liquid form comprising particles; a translating arrangement configured to translate said image acquisition area through at least a part of said sample container with a step length between each acquired image; a controller configured to control said optical detection assembly and said translating arrangement to acquire images of a plurality of image acquisition areas; an image processor programmed to analyze said acquired images and to determine a set of features for an individual particle captured by said acquired images by creating objects of the individual particle and assigning each of the objects to a corresponding stack of objects comprising diffrent images of the individual particle; and an artificial intelligent processor programmed to associate said set of features for said individual particle to a particle classification of particles. where said step length between each acquired image is used to determine a distance between the objects in the stacks of objects.