Measuring the wholeness of the unpolished grains involves placing 1,000 grains into a grain differentiator, in which images of the grains are optically compared to a standard size.
測量糙米完整粒，則是一次放 1,000 顆糙米進米粒判別機，運用類似照相機的光學原理，將欲測量米粒與內建的標準米粒圖像相互比對。