Processes in which mixing plays a crucial role in increasing mass transfer, interfacial surface, and homogenization are frequently and widely used throughout the industry. Agitation of immiscible liquids or solid-liquid suspensions is a frequent operation in chemical and metallurgical industry. The aim of this contribution is to study drop size evolution kinetics in a liquid-liquid dispersion system in a vessel agitated by a Rushton turbine and to analyze the homogeneity of the dispersed system in a volume of the agitated vessel. The homogeneity of liquid-liquid dispersion in a volume of a mixed system was determined by comparison of Sauter mean diameters and drop size distribution (DSD) from different measured regions. The sizes of drops were obtained from the images captured by a camera system and were processed by the Image Analysis method.