An image processing system was developed which was specially used for the detection of the quality indexes of chalkiness and percentage of chalky rice kernels listed in the national standard GB/T 17891-1999. Six round-grained and two long-grained nonglutinous varieties of rice were inspected with the aid of the system. Its characteristics were well objective, accurate, quick and repeatable. The system is a potential solution for rapid quality determination in rice purchasing practice.