Recent trend in granulation technology is toward an improvement of process efficiency, stability of product quality and labor-saving. With such improvements and recent temporary increases in demand for granulation technologies, there is a great need for a reliable tool for the process monitoring and control. This paper presents new technologies for measurement and control of granule growth in wet granulation processes. Advanced technologies of image processing realize direct and continuous control of wet granulation processes. This contribution may assist readers who wish to stabilize the product quality and to establish the automated operation system of wet granulation processes.