Akio Matsuzaki

Two-dimensional image analysis of the shape of rice and its application to separating varieties

To analyze the shapes of brown rice and polished rice, a series of measurements by image processing on Japonica, Indica and Javanica types composed of four rice varieties with three polishing methods were carried out. Area, perimeter, maximum length, maximum width, compactness and elongation were measured. The maximum length, maximum width and elongation of a rice particle defined here were different from the traditional dimensions such as length and width. Further, separating the rice varieties by the shape difference of a rice particle was examined. From the result of the investigation on brown rice and polished rice, separating the rice varieties was possible at a probability level of 95.4% with combined dimensions and shape factors or with single ones.