PROBLEM TO BE SOLVED: To provide an identification system which facilitates personal identification on the basis of a two-dimensional image of a tooth, a denture mold or the like.SOLUTION: An identification system 100 comprises: a photographing unit 101 for acquiring image data of a tooth, a denture mold, a dental model, and a derivative generated on the basis of a dental technology material or the tooth; a feature extraction unit 102 for extracting the feature amount of the image data; a feature-patient information storage unit 103 which associates patient information with the feature amount relating to a patient and stores them; and a retrieval unit 104 which retrieves, from the feature-patient information storage unit, the patient information corresponding to the feature amount extracted by the feature extraction unit.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】歯又は歯の模型等の2次元画像に基づいて容易に個人識別を行うことができる識別システムを提供する。【解決手段】識別システム100は、歯、歯型、歯科模型、歯科技工物又は歯に基づいて生成される派生物の画像データを取得する撮影部101と、前記画像データの特徴量を抽出する特徴抽出部102と、患者情報と、前記患者にかかる前記特徴量と、を対応付けて記憶する特徴-患者情報記憶部103と、前記特徴抽出部が抽出した前記特徴量に対応する前記患者情報を、前記特徴-患者情報記憶部から検索する検索部104と、を有する。【選択図】図1