Next, we want to solve problems which are how to extract tooth regions, how to segment teeth from tooth regions, how to detect amalgam from a tooth, and how to detect the existence of a missing tooth.

• 因此，我们要解决的问题为：如何从牙齿影像中撷取出牙齿的区域、从牙齿的区域切割出每颗牙齿、再从每颗我们所切割的牙齿判别是否补银粉及侦测缺牙。